Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2000 by Hans Reiser, licensing governed by reiserfs/README |
| 3 | */ |
| 4 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | #include <linux/time.h> |
| 6 | #include <linux/fs.h> |
Al Viro | f466c6f | 2012-03-17 01:16:43 -0400 | [diff] [blame] | 7 | #include "reiserfs.h" |
Al Viro | a3063ab | 2012-03-17 01:03:10 -0400 | [diff] [blame] | 8 | #include "acl.h" |
Al Viro | c45ac88 | 2012-03-17 00:59:06 -0400 | [diff] [blame] | 9 | #include "xattr.h" |
Christoph Hellwig | a569425 | 2007-07-17 04:04:28 -0700 | [diff] [blame] | 10 | #include <linux/exportfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/pagemap.h> |
| 12 | #include <linux/highmem.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Fabian Frederick | 17093991 | 2014-08-08 14:21:12 -0700 | [diff] [blame] | 14 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <asm/unaligned.h> |
| 16 | #include <linux/buffer_head.h> |
| 17 | #include <linux/mpage.h> |
| 18 | #include <linux/writeback.h> |
| 19 | #include <linux/quotaops.h> |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 20 | #include <linux/swap.h> |
Christoph Hellwig | e2e40f2 | 2015-02-22 08:58:50 -0800 | [diff] [blame] | 21 | #include <linux/uio.h> |
Christoph Hellwig | be29796 | 2016-11-01 07:40:16 -0600 | [diff] [blame] | 22 | #include <linux/bio.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 24 | int reiserfs_commit_write(struct file *f, struct page *page, |
| 25 | unsigned from, unsigned to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 27 | void reiserfs_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 29 | /* |
| 30 | * We need blocks for transaction + (user+group) quota |
| 31 | * update (possibly delete) |
| 32 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 33 | int jbegin_count = |
| 34 | JOURNAL_PER_BALANCE_CNT * 2 + |
| 35 | 2 * REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb); |
| 36 | struct reiserfs_transaction_handle th; |
Jeff Mahoney | 2499604 | 2005-12-14 14:38:05 -0500 | [diff] [blame] | 37 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 39 | if (!inode->i_nlink && !is_bad_inode(inode)) |
Christoph Hellwig | 871a293 | 2010-03-03 09:05:07 -0500 | [diff] [blame] | 40 | dquot_initialize(inode); |
Christoph Hellwig | 907f455 | 2010-03-03 09:05:06 -0500 | [diff] [blame] | 41 | |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 42 | truncate_inode_pages_final(&inode->i_data); |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 43 | if (inode->i_nlink) |
| 44 | goto no_delete; |
Mark Fasheh | fef2665 | 2005-09-09 13:01:31 -0700 | [diff] [blame] | 45 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 46 | /* |
| 47 | * The = 0 happens when we abort creating a new inode |
| 48 | * for some reason like lack of space.. |
| 49 | * also handles bad_inode case |
| 50 | */ |
| 51 | if (!(inode->i_state & I_NEW) && INODE_PKEY(inode)->k_objectid != 0) { |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 52 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 53 | reiserfs_delete_xattrs(inode); |
| 54 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 55 | reiserfs_write_lock(inode->i_sb); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 56 | |
Alexander Zarochentsev | b0b33de | 2006-08-05 12:14:01 -0700 | [diff] [blame] | 57 | if (journal_begin(&th, inode->i_sb, jbegin_count)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 58 | goto out; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 59 | reiserfs_update_inode_transaction(inode); |
| 60 | |
Jeff Mahoney | eb35c21 | 2008-07-08 14:37:06 -0400 | [diff] [blame] | 61 | reiserfs_discard_prealloc(&th, inode); |
| 62 | |
Jeff Mahoney | 2499604 | 2005-12-14 14:38:05 -0500 | [diff] [blame] | 63 | err = reiserfs_delete_object(&th, inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 64 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 65 | /* |
| 66 | * Do quota update inside a transaction for journaled quotas. |
| 67 | * We must do that after delete_object so that quota updates |
| 68 | * go into the same transaction as stat data deletion |
| 69 | */ |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 70 | if (!err) { |
| 71 | int depth = reiserfs_write_unlock_nested(inode->i_sb); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 72 | dquot_free_inode(inode); |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 73 | reiserfs_write_lock_nested(inode->i_sb, depth); |
| 74 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 75 | |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 76 | if (journal_end(&th)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 77 | goto out; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 78 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 79 | /* |
| 80 | * check return value from reiserfs_delete_object after |
Jeff Mahoney | 2499604 | 2005-12-14 14:38:05 -0500 | [diff] [blame] | 81 | * ending the transaction |
| 82 | */ |
| 83 | if (err) |
| 84 | goto out; |
| 85 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 86 | /* |
| 87 | * all items of file are deleted, so we can remove |
| 88 | * "save" link |
| 89 | * we can't do anything about an error here |
| 90 | */ |
| 91 | remove_save_link(inode, 0 /* not truncate */); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 92 | out: |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 93 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 94 | } else { |
| 95 | /* no object items are in the tree */ |
| 96 | ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 98 | |
| 99 | /* note this must go after the journal_end to prevent deadlock */ |
| 100 | clear_inode(inode); |
| 101 | |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 102 | dquot_drop(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 103 | inode->i_blocks = 0; |
Sergey Senozhatsky | f4ae2fa | 2010-08-11 14:07:01 +0300 | [diff] [blame] | 104 | return; |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 105 | |
| 106 | no_delete: |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 107 | clear_inode(inode); |
Al Viro | 845a2cc | 2010-06-07 11:37:37 -0400 | [diff] [blame] | 108 | dquot_drop(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } |
| 110 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 111 | static void _make_cpu_key(struct cpu_key *key, int version, __u32 dirid, |
| 112 | __u32 objectid, loff_t offset, int type, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 114 | key->version = version; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 116 | key->on_disk_key.k_dir_id = dirid; |
| 117 | key->on_disk_key.k_objectid = objectid; |
| 118 | set_cpu_key_k_offset(key, offset); |
| 119 | set_cpu_key_k_type(key, type); |
| 120 | key->key_length = length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | } |
| 122 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 123 | /* |
| 124 | * take base of inode_key (it comes from inode always) (dirid, objectid) |
| 125 | * and version from an inode, set offset and type of key |
| 126 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 127 | void make_cpu_key(struct cpu_key *key, struct inode *inode, loff_t offset, |
| 128 | int type, int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 130 | _make_cpu_key(key, get_inode_item_key_version(inode), |
| 131 | le32_to_cpu(INODE_PKEY(inode)->k_dir_id), |
| 132 | le32_to_cpu(INODE_PKEY(inode)->k_objectid), offset, type, |
| 133 | length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 136 | /* when key is 0, do not set version and short key */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 137 | inline void make_le_item_head(struct item_head *ih, const struct cpu_key *key, |
| 138 | int version, |
| 139 | loff_t offset, int type, int length, |
| 140 | int entry_count /*or ih_free_space */ ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 142 | if (key) { |
| 143 | ih->ih_key.k_dir_id = cpu_to_le32(key->on_disk_key.k_dir_id); |
| 144 | ih->ih_key.k_objectid = |
| 145 | cpu_to_le32(key->on_disk_key.k_objectid); |
| 146 | } |
| 147 | put_ih_version(ih, version); |
| 148 | set_le_ih_k_offset(ih, offset); |
| 149 | set_le_ih_k_type(ih, type); |
| 150 | put_ih_item_len(ih, length); |
| 151 | /* set_ih_free_space (ih, 0); */ |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 152 | /* |
| 153 | * for directory items it is entry count, for directs and stat |
| 154 | * datas - 0xffff, for indirects - 0 |
| 155 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 156 | put_ih_entry_count(ih, entry_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | } |
| 158 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 159 | /* |
| 160 | * FIXME: we might cache recently accessed indirect item |
| 161 | * Ugh. Not too eager for that.... |
| 162 | * I cut the code until such time as I see a convincing argument (benchmark). |
| 163 | * I don't want a bloated inode struct..., and I don't like code complexity.... |
| 164 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 166 | /* |
| 167 | * cutting the code is fine, since it really isn't in use yet and is easy |
| 168 | * to add back in. But, Vladimir has a really good idea here. Think |
| 169 | * about what happens for reading a file. For each page, |
| 170 | * The VFS layer calls reiserfs_readpage, who searches the tree to find |
| 171 | * an indirect item. This indirect item has X number of pointers, where |
| 172 | * X is a big number if we've done the block allocation right. But, |
| 173 | * we only use one or two of these pointers during each call to readpage, |
| 174 | * needlessly researching again later on. |
| 175 | * |
| 176 | * The size of the cache could be dynamic based on the size of the file. |
| 177 | * |
| 178 | * I'd also like to see us cache the location the stat data item, since |
| 179 | * we are needlessly researching for that frequently. |
| 180 | * |
| 181 | * --chris |
| 182 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 184 | /* |
| 185 | * If this page has a file tail in it, and |
| 186 | * it was read in by get_block_create_0, the page data is valid, |
| 187 | * but tail is still sitting in a direct item, and we can't write to |
| 188 | * it. So, look through this page, and check all the mapped buffers |
| 189 | * to make sure they have valid block numbers. Any that don't need |
| 190 | * to be unmapped, so that __block_write_begin will correctly call |
| 191 | * reiserfs_get_block to convert the tail into an unformatted node |
| 192 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 193 | static inline void fix_tail_page_for_writing(struct page *page) |
| 194 | { |
| 195 | struct buffer_head *head, *next, *bh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 197 | if (page && page_has_buffers(page)) { |
| 198 | head = page_buffers(page); |
| 199 | bh = head; |
| 200 | do { |
| 201 | next = bh->b_this_page; |
| 202 | if (buffer_mapped(bh) && bh->b_blocknr == 0) { |
| 203 | reiserfs_unmap_buffer(bh); |
| 204 | } |
| 205 | bh = next; |
| 206 | } while (bh != head); |
| 207 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 210 | /* |
| 211 | * reiserfs_get_block does not need to allocate a block only if it has been |
| 212 | * done already or non-hole position has been found in the indirect item |
| 213 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 214 | static inline int allocation_needed(int retval, b_blocknr_t allocated, |
| 215 | struct item_head *ih, |
| 216 | __le32 * item, int pos_in_item) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 218 | if (allocated) |
| 219 | return 0; |
| 220 | if (retval == POSITION_FOUND && is_indirect_le_ih(ih) && |
| 221 | get_block_num(item, pos_in_item)) |
| 222 | return 0; |
| 223 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
| 225 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 226 | static inline int indirect_item_found(int retval, struct item_head *ih) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 228 | return (retval == POSITION_FOUND) && is_indirect_le_ih(ih); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 231 | static inline void set_block_dev_mapped(struct buffer_head *bh, |
| 232 | b_blocknr_t block, struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
| 234 | map_bh(bh, inode->i_sb, block); |
| 235 | } |
| 236 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 237 | /* |
| 238 | * files which were created in the earlier version can not be longer, |
| 239 | * than 2 gb |
| 240 | */ |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 241 | static int file_capable(struct inode *inode, sector_t block) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 243 | /* it is new file. */ |
| 244 | if (get_inode_item_key_version(inode) != KEY_FORMAT_3_5 || |
| 245 | /* old file, but 'block' is inside of 2gb */ |
| 246 | block < (1 << (31 - inode->i_sb->s_blocksize_bits))) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 247 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 249 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | } |
| 251 | |
Adrian Bunk | deba0f4 | 2007-10-16 23:26:03 -0700 | [diff] [blame] | 252 | static int restart_transaction(struct reiserfs_transaction_handle *th, |
| 253 | struct inode *inode, struct treepath *path) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 254 | { |
| 255 | struct super_block *s = th->t_super; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 256 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 258 | BUG_ON(!th->t_trans_id); |
| 259 | BUG_ON(!th->t_refcount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | |
Suzuki K P | 87b4126 | 2006-12-06 20:36:10 -0800 | [diff] [blame] | 261 | pathrelse(path); |
| 262 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 263 | /* we cannot restart while nested */ |
| 264 | if (th->t_refcount > 1) { |
| 265 | return 0; |
| 266 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 267 | reiserfs_update_sd(th, inode); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 268 | err = journal_end(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 269 | if (!err) { |
| 270 | err = journal_begin(th, s, JOURNAL_PER_BALANCE_CNT * 6); |
| 271 | if (!err) |
| 272 | reiserfs_update_inode_transaction(inode); |
| 273 | } |
| 274 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | } |
| 276 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 277 | /* |
| 278 | * it is called by get_block when create == 0. Returns block number |
| 279 | * for 'block'-th logical block of file. When it hits direct item it |
| 280 | * returns 0 (being called from bmap) or read direct item into piece |
| 281 | * of page (bh_result) |
| 282 | * Please improve the english/clarity in the comment above, as it is |
| 283 | * hard to understand. |
| 284 | */ |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 285 | static int _get_block_create_0(struct inode *inode, sector_t block, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 286 | struct buffer_head *bh_result, int args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 288 | INITIALIZE_PATH(path); |
| 289 | struct cpu_key key; |
| 290 | struct buffer_head *bh; |
| 291 | struct item_head *ih, tmp_ih; |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 292 | b_blocknr_t blocknr; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 293 | char *p = NULL; |
| 294 | int chars; |
| 295 | int ret; |
| 296 | int result; |
| 297 | int done = 0; |
| 298 | unsigned long offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 300 | /* prepare the key to look for the 'block'-th block of file */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 301 | make_cpu_key(&key, inode, |
| 302 | (loff_t) block * inode->i_sb->s_blocksize + 1, TYPE_ANY, |
| 303 | 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 305 | result = search_for_position_by_key(inode->i_sb, &key, &path); |
| 306 | if (result != POSITION_FOUND) { |
| 307 | pathrelse(&path); |
| 308 | if (p) |
| 309 | kunmap(bh_result->b_page); |
| 310 | if (result == IO_ERROR) |
| 311 | return -EIO; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 312 | /* |
| 313 | * We do not return -ENOENT if there is a hole but page is |
| 314 | * uptodate, because it means that there is some MMAPED data |
| 315 | * associated with it that is yet to be written to disk. |
| 316 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 317 | if ((args & GET_BLOCK_NO_HOLE) |
| 318 | && !PageUptodate(bh_result->b_page)) { |
| 319 | return -ENOENT; |
| 320 | } |
| 321 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 323 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 324 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 325 | ih = tp_item_head(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 326 | if (is_indirect_le_ih(ih)) { |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 327 | __le32 *ind_item = (__le32 *) ih_item_body(bh, ih); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 329 | /* |
| 330 | * FIXME: here we could cache indirect item or part of it in |
| 331 | * the inode to avoid search_by_key in case of subsequent |
| 332 | * access to file |
| 333 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 334 | blocknr = get_block_num(ind_item, path.pos_in_item); |
| 335 | ret = 0; |
| 336 | if (blocknr) { |
| 337 | map_bh(bh_result, inode->i_sb, blocknr); |
| 338 | if (path.pos_in_item == |
| 339 | ((ih_item_len(ih) / UNFM_P_SIZE) - 1)) { |
| 340 | set_buffer_boundary(bh_result); |
| 341 | } |
| 342 | } else |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 343 | /* |
| 344 | * We do not return -ENOENT if there is a hole but |
| 345 | * page is uptodate, because it means that there is |
| 346 | * some MMAPED data associated with it that is |
| 347 | * yet to be written to disk. |
| 348 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 349 | if ((args & GET_BLOCK_NO_HOLE) |
| 350 | && !PageUptodate(bh_result->b_page)) { |
| 351 | ret = -ENOENT; |
| 352 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 354 | pathrelse(&path); |
| 355 | if (p) |
| 356 | kunmap(bh_result->b_page); |
| 357 | return ret; |
| 358 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 359 | /* requested data are in direct item(s) */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 360 | if (!(args & GET_BLOCK_READ_DIRECT)) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 361 | /* |
| 362 | * we are called by bmap. FIXME: we can not map block of file |
| 363 | * when it is stored in direct item(s) |
| 364 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 365 | pathrelse(&path); |
| 366 | if (p) |
| 367 | kunmap(bh_result->b_page); |
| 368 | return -ENOENT; |
| 369 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 371 | /* |
| 372 | * if we've got a direct item, and the buffer or page was uptodate, |
| 373 | * we don't want to pull data off disk again. skip to the |
| 374 | * end, where we map the buffer and return |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 375 | */ |
| 376 | if (buffer_uptodate(bh_result)) { |
| 377 | goto finished; |
| 378 | } else |
| 379 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 380 | * grab_tail_page can trigger calls to reiserfs_get_block on |
| 381 | * up to date pages without any buffers. If the page is up |
| 382 | * to date, we don't want read old data off disk. Set the up |
| 383 | * to date bit on the buffer instead and jump to the end |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 384 | */ |
| 385 | if (!bh_result->b_page || PageUptodate(bh_result->b_page)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | set_buffer_uptodate(bh_result); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 387 | goto finished; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 389 | /* read file tail into part of page */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 390 | offset = (cpu_key_k_offset(&key) - 1) & (PAGE_SIZE - 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 391 | copy_item_head(&tmp_ih, ih); |
| 392 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 393 | /* |
| 394 | * we only want to kmap if we are reading the tail into the page. |
| 395 | * this is not the common case, so we don't kmap until we are |
| 396 | * sure we need to. But, this means the item might move if |
| 397 | * kmap schedules |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 398 | */ |
Frederic Weisbecker | 27b3a5c | 2009-10-14 23:34:31 +0200 | [diff] [blame] | 399 | if (!p) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 400 | p = (char *)kmap(bh_result->b_page); |
Frederic Weisbecker | 27b3a5c | 2009-10-14 23:34:31 +0200 | [diff] [blame] | 401 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 402 | p += offset; |
| 403 | memset(p, 0, inode->i_sb->s_blocksize); |
| 404 | do { |
| 405 | if (!is_direct_le_ih(ih)) { |
| 406 | BUG(); |
| 407 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 408 | /* |
| 409 | * make sure we don't read more bytes than actually exist in |
| 410 | * the file. This can happen in odd cases where i_size isn't |
| 411 | * correct, and when direct item padding results in a few |
| 412 | * extra bytes at the end of the direct item |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 413 | */ |
| 414 | if ((le_ih_k_offset(ih) + path.pos_in_item) > inode->i_size) |
| 415 | break; |
| 416 | if ((le_ih_k_offset(ih) - 1 + ih_item_len(ih)) > inode->i_size) { |
| 417 | chars = |
| 418 | inode->i_size - (le_ih_k_offset(ih) - 1) - |
| 419 | path.pos_in_item; |
| 420 | done = 1; |
| 421 | } else { |
| 422 | chars = ih_item_len(ih) - path.pos_in_item; |
| 423 | } |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 424 | memcpy(p, ih_item_body(bh, ih) + path.pos_in_item, chars); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 426 | if (done) |
| 427 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 429 | p += chars; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 431 | /* |
| 432 | * we done, if read direct item is not the last item of |
| 433 | * node FIXME: we could try to check right delimiting key |
| 434 | * to see whether direct item continues in the right |
| 435 | * neighbor or rely on i_size |
| 436 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 437 | if (PATH_LAST_POSITION(&path) != (B_NR_ITEMS(bh) - 1)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 438 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 440 | /* update key to look for the next piece */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 441 | set_cpu_key_k_offset(&key, cpu_key_k_offset(&key) + chars); |
| 442 | result = search_for_position_by_key(inode->i_sb, &key, &path); |
| 443 | if (result != POSITION_FOUND) |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 444 | /* i/o error most likely */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 445 | break; |
| 446 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 447 | ih = tp_item_head(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 448 | } while (1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 450 | flush_dcache_page(bh_result->b_page); |
| 451 | kunmap(bh_result->b_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 453 | finished: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 454 | pathrelse(&path); |
Qu Fuping | 6283d58 | 2005-06-25 14:55:44 -0700 | [diff] [blame] | 455 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 456 | if (result == IO_ERROR) |
| 457 | return -EIO; |
Qu Fuping | 6283d58 | 2005-06-25 14:55:44 -0700 | [diff] [blame] | 458 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 459 | /* |
| 460 | * this buffer has valid data, but isn't valid for io. mapping it to |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 461 | * block #0 tells the rest of reiserfs it just has a tail in it |
| 462 | */ |
| 463 | map_bh(bh_result, inode->i_sb, 0); |
| 464 | set_buffer_uptodate(bh_result); |
| 465 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | } |
| 467 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 468 | /* |
| 469 | * this is called to create file map. So, _get_block_create_0 will not |
| 470 | * read direct item |
| 471 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 472 | static int reiserfs_bmap(struct inode *inode, sector_t block, |
| 473 | struct buffer_head *bh_result, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 475 | if (!file_capable(inode, block)) |
| 476 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 478 | reiserfs_write_lock(inode->i_sb); |
| 479 | /* do not read the direct item */ |
| 480 | _get_block_create_0(inode, block, bh_result, 0); |
| 481 | reiserfs_write_unlock(inode->i_sb); |
| 482 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | } |
| 484 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 485 | /* |
| 486 | * special version of get_block that is only used by grab_tail_page right |
| 487 | * now. It is sent to __block_write_begin, and when you try to get a |
| 488 | * block past the end of the file (or a block from a hole) it returns |
| 489 | * -ENOENT instead of a valid buffer. __block_write_begin expects to |
| 490 | * be able to do i/o on the buffers returned, unless an error value |
| 491 | * is also returned. |
| 492 | * |
| 493 | * So, this allows __block_write_begin to be used for reading a single block |
| 494 | * in a page. Where it does not produce a valid page for holes, or past the |
| 495 | * end of the file. This turns out to be exactly what we need for reading |
| 496 | * tails for conversion. |
| 497 | * |
| 498 | * The point of the wrapper is forcing a certain value for create, even |
| 499 | * though the VFS layer is calling this function with create==1. If you |
| 500 | * don't want to send create == GET_BLOCK_NO_HOLE to reiserfs_get_block, |
| 501 | * don't use this function. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 503 | static int reiserfs_get_block_create_0(struct inode *inode, sector_t block, |
| 504 | struct buffer_head *bh_result, |
| 505 | int create) |
| 506 | { |
| 507 | return reiserfs_get_block(inode, block, bh_result, GET_BLOCK_NO_HOLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | } |
| 509 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 510 | /* |
| 511 | * This is special helper for reiserfs_get_block in case we are executing |
| 512 | * direct_IO request. |
| 513 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | static int reiserfs_get_blocks_direct_io(struct inode *inode, |
| 515 | sector_t iblock, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | struct buffer_head *bh_result, |
| 517 | int create) |
| 518 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 519 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 521 | bh_result->b_page = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 523 | /* |
| 524 | * We set the b_size before reiserfs_get_block call since it is |
| 525 | * referenced in convert_tail_for_hole() that may be called from |
| 526 | * reiserfs_get_block() |
| 527 | */ |
Fabian Frederick | 9340747 | 2017-02-27 14:28:32 -0800 | [diff] [blame] | 528 | bh_result->b_size = i_blocksize(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 530 | ret = reiserfs_get_block(inode, iblock, bh_result, |
| 531 | create | GET_BLOCK_NO_DANGLE); |
| 532 | if (ret) |
| 533 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 535 | /* don't allow direct io onto tail pages */ |
| 536 | if (buffer_mapped(bh_result) && bh_result->b_blocknr == 0) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 537 | /* |
| 538 | * make sure future calls to the direct io funcs for this |
| 539 | * offset in the file fail by unmapping the buffer |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 540 | */ |
| 541 | clear_buffer_mapped(bh_result); |
| 542 | ret = -EINVAL; |
| 543 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 544 | |
| 545 | /* |
| 546 | * Possible unpacked tail. Flush the data before pages have |
| 547 | * disappeared |
| 548 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 549 | if (REISERFS_I(inode)->i_flags & i_pack_on_close_mask) { |
| 550 | int err; |
Frederic Weisbecker | 8ebc423 | 2009-04-07 04:19:49 +0200 | [diff] [blame] | 551 | |
| 552 | reiserfs_write_lock(inode->i_sb); |
| 553 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 554 | err = reiserfs_commit_for_inode(inode); |
| 555 | REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask; |
Frederic Weisbecker | 8ebc423 | 2009-04-07 04:19:49 +0200 | [diff] [blame] | 556 | |
| 557 | reiserfs_write_unlock(inode->i_sb); |
| 558 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 559 | if (err < 0) |
| 560 | ret = err; |
| 561 | } |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 562 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 563 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | } |
| 565 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 567 | * helper function for when reiserfs_get_block is called for a hole |
| 568 | * but the file tail is still in a direct item |
| 569 | * bh_result is the buffer head for the hole |
| 570 | * tail_offset is the offset of the start of the tail in the file |
| 571 | * |
| 572 | * This calls prepare_write, which will start a new transaction |
| 573 | * you should not be in a transaction, or have any paths held when you |
| 574 | * call this. |
| 575 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 576 | static int convert_tail_for_hole(struct inode *inode, |
| 577 | struct buffer_head *bh_result, |
| 578 | loff_t tail_offset) |
| 579 | { |
| 580 | unsigned long index; |
| 581 | unsigned long tail_end; |
| 582 | unsigned long tail_start; |
| 583 | struct page *tail_page; |
| 584 | struct page *hole_page = bh_result->b_page; |
| 585 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 587 | if ((tail_offset & (bh_result->b_size - 1)) != 1) |
| 588 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 590 | /* always try to read until the end of the block */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 591 | tail_start = tail_offset & (PAGE_SIZE - 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 592 | tail_end = (tail_start | (bh_result->b_size - 1)) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 594 | index = tail_offset >> PAGE_SHIFT; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 595 | /* |
| 596 | * hole_page can be zero in case of direct_io, we are sure |
| 597 | * that we cannot get here if we write with O_DIRECT into tail page |
| 598 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 599 | if (!hole_page || index != hole_page->index) { |
| 600 | tail_page = grab_cache_page(inode->i_mapping, index); |
| 601 | retval = -ENOMEM; |
| 602 | if (!tail_page) { |
| 603 | goto out; |
| 604 | } |
| 605 | } else { |
| 606 | tail_page = hole_page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 609 | /* |
| 610 | * we don't have to make sure the conversion did not happen while |
| 611 | * we were locking the page because anyone that could convert |
| 612 | * must first take i_mutex. |
| 613 | * |
| 614 | * We must fix the tail page for writing because it might have buffers |
| 615 | * that are mapped, but have a block number of 0. This indicates tail |
| 616 | * data that has been read directly into the page, and |
| 617 | * __block_write_begin won't trigger a get_block in this case. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 618 | */ |
| 619 | fix_tail_page_for_writing(tail_page); |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 620 | retval = __reiserfs_write_begin(tail_page, tail_start, |
| 621 | tail_end - tail_start); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 622 | if (retval) |
| 623 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 625 | /* tail conversion might change the data in the page */ |
| 626 | flush_dcache_page(tail_page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 628 | retval = reiserfs_commit_write(NULL, tail_page, tail_start, tail_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 630 | unlock: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 631 | if (tail_page != hole_page) { |
| 632 | unlock_page(tail_page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 633 | put_page(tail_page); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 634 | } |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 635 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 636 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | } |
| 638 | |
| 639 | static inline int _allocate_block(struct reiserfs_transaction_handle *th, |
Jeff Mahoney | 3ee1667 | 2007-10-18 23:39:25 -0700 | [diff] [blame] | 640 | sector_t block, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 641 | struct inode *inode, |
| 642 | b_blocknr_t * allocated_block_nr, |
Josef "Jeff" Sipek | fec6d05 | 2006-12-08 02:36:32 -0800 | [diff] [blame] | 643 | struct treepath *path, int flags) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 644 | { |
| 645 | BUG_ON(!th->t_trans_id); |
| 646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | #ifdef REISERFS_PREALLOCATE |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 648 | if (!(flags & GET_BLOCK_NO_IMUX)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 649 | return reiserfs_new_unf_blocknrs2(th, inode, allocated_block_nr, |
| 650 | path, block); |
| 651 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 653 | return reiserfs_new_unf_blocknrs(th, inode, allocated_block_nr, path, |
| 654 | block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | } |
| 656 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 657 | int reiserfs_get_block(struct inode *inode, sector_t block, |
| 658 | struct buffer_head *bh_result, int create) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 660 | int repeat, retval = 0; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 661 | /* b_blocknr_t is (unsigned) 32 bit int*/ |
| 662 | b_blocknr_t allocated_block_nr = 0; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 663 | INITIALIZE_PATH(path); |
| 664 | int pos_in_item; |
| 665 | struct cpu_key key; |
| 666 | struct buffer_head *bh, *unbh = NULL; |
| 667 | struct item_head *ih, tmp_ih; |
| 668 | __le32 *item; |
| 669 | int done; |
| 670 | int fs_gen; |
| 671 | struct reiserfs_transaction_handle *th = NULL; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 672 | /* |
| 673 | * space reserved in transaction batch: |
| 674 | * . 3 balancings in direct->indirect conversion |
| 675 | * . 1 block involved into reiserfs_update_sd() |
| 676 | * XXX in practically impossible worst case direct2indirect() |
| 677 | * can incur (much) more than 3 balancings. |
| 678 | * quota update for user, group |
| 679 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 680 | int jbegin_count = |
| 681 | JOURNAL_PER_BALANCE_CNT * 3 + 1 + |
| 682 | 2 * REISERFS_QUOTA_TRANS_BLOCKS(inode->i_sb); |
| 683 | int version; |
| 684 | int dangle = 1; |
| 685 | loff_t new_offset = |
| 686 | (((loff_t) block) << inode->i_sb->s_blocksize_bits) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 688 | reiserfs_write_lock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 689 | version = get_inode_item_key_version(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 691 | if (!file_capable(inode, block)) { |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 692 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 693 | return -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 696 | /* |
| 697 | * if !create, we aren't changing the FS, so we don't need to |
| 698 | * log anything, so we don't need to start a transaction |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 699 | */ |
| 700 | if (!(create & GET_BLOCK_CREATE)) { |
| 701 | int ret; |
| 702 | /* find number of block-th logical block of the file */ |
| 703 | ret = _get_block_create_0(inode, block, bh_result, |
| 704 | create | GET_BLOCK_READ_DIRECT); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 705 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 706 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 708 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 709 | /* |
| 710 | * if we're already in a transaction, make sure to close |
| 711 | * any new transactions we start in this func |
| 712 | */ |
| 713 | if ((create & GET_BLOCK_NO_DANGLE) || |
| 714 | reiserfs_transaction_running(inode->i_sb)) |
| 715 | dangle = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 716 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 717 | /* |
| 718 | * If file is of such a size, that it might have a tail and |
| 719 | * tails are enabled we should mark it as possibly needing |
| 720 | * tail packing on close |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 721 | */ |
| 722 | if ((have_large_tails(inode->i_sb) |
| 723 | && inode->i_size < i_block_size(inode) * 4) |
| 724 | || (have_small_tails(inode->i_sb) |
| 725 | && inode->i_size < i_block_size(inode))) |
| 726 | REISERFS_I(inode)->i_flags |= i_pack_on_close_mask; |
| 727 | |
| 728 | /* set the key of the first byte in the 'block'-th block of file */ |
| 729 | make_cpu_key(&key, inode, new_offset, TYPE_ANY, 3 /*key length */ ); |
| 730 | if ((new_offset + inode->i_sb->s_blocksize - 1) > inode->i_size) { |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 731 | start_trans: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 732 | th = reiserfs_persistent_transaction(inode->i_sb, jbegin_count); |
| 733 | if (!th) { |
| 734 | retval = -ENOMEM; |
| 735 | goto failure; |
| 736 | } |
| 737 | reiserfs_update_inode_transaction(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | } |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 739 | research: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 741 | retval = search_for_position_by_key(inode->i_sb, &key, &path); |
| 742 | if (retval == IO_ERROR) { |
| 743 | retval = -EIO; |
| 744 | goto failure; |
| 745 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 747 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 748 | ih = tp_item_head(&path); |
| 749 | item = tp_item_body(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 750 | pos_in_item = path.pos_in_item; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 752 | fs_gen = get_generation(inode->i_sb); |
| 753 | copy_item_head(&tmp_ih, ih); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 755 | if (allocation_needed |
| 756 | (retval, allocated_block_nr, ih, item, pos_in_item)) { |
| 757 | /* we have to allocate block for the unformatted node */ |
| 758 | if (!th) { |
| 759 | pathrelse(&path); |
| 760 | goto start_trans; |
| 761 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 763 | repeat = |
| 764 | _allocate_block(th, block, inode, &allocated_block_nr, |
| 765 | &path, create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 767 | /* |
| 768 | * restart the transaction to give the journal a chance to free |
| 769 | * some blocks. releases the path, so we have to go back to |
| 770 | * research if we succeed on the second try |
| 771 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 772 | if (repeat == NO_DISK_SPACE || repeat == QUOTA_EXCEEDED) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 773 | SB_JOURNAL(inode->i_sb)->j_next_async_flush = 1; |
| 774 | retval = restart_transaction(th, inode, &path); |
| 775 | if (retval) |
| 776 | goto failure; |
| 777 | repeat = |
| 778 | _allocate_block(th, block, inode, |
| 779 | &allocated_block_nr, NULL, create); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 781 | if (repeat != NO_DISK_SPACE && repeat != QUOTA_EXCEEDED) { |
| 782 | goto research; |
| 783 | } |
| 784 | if (repeat == QUOTA_EXCEEDED) |
| 785 | retval = -EDQUOT; |
| 786 | else |
| 787 | retval = -ENOSPC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 788 | goto failure; |
| 789 | } |
| 790 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 791 | if (fs_changed(fs_gen, inode->i_sb) |
| 792 | && item_moved(&tmp_ih, &path)) { |
| 793 | goto research; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 794 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 797 | if (indirect_item_found(retval, ih)) { |
| 798 | b_blocknr_t unfm_ptr; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 799 | /* |
| 800 | * 'block'-th block is in the file already (there is |
| 801 | * corresponding cell in some indirect item). But it may be |
| 802 | * zero unformatted node pointer (hole) |
| 803 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 804 | unfm_ptr = get_block_num(item, pos_in_item); |
| 805 | if (unfm_ptr == 0) { |
| 806 | /* use allocated block to plug the hole */ |
| 807 | reiserfs_prepare_for_journal(inode->i_sb, bh, 1); |
| 808 | if (fs_changed(fs_gen, inode->i_sb) |
| 809 | && item_moved(&tmp_ih, &path)) { |
| 810 | reiserfs_restore_prepared_buffer(inode->i_sb, |
| 811 | bh); |
| 812 | goto research; |
| 813 | } |
| 814 | set_buffer_new(bh_result); |
| 815 | if (buffer_dirty(bh_result) |
| 816 | && reiserfs_data_ordered(inode->i_sb)) |
| 817 | reiserfs_add_ordered_list(inode, bh_result); |
| 818 | put_block_num(item, pos_in_item, allocated_block_nr); |
| 819 | unfm_ptr = allocated_block_nr; |
Jeff Mahoney | 09f1b80 | 2014-04-23 10:00:39 -0400 | [diff] [blame] | 820 | journal_mark_dirty(th, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 821 | reiserfs_update_sd(th, inode); |
| 822 | } |
| 823 | set_block_dev_mapped(bh_result, unfm_ptr, inode); |
| 824 | pathrelse(&path); |
| 825 | retval = 0; |
| 826 | if (!dangle && th) |
| 827 | retval = reiserfs_end_persistent_transaction(th); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 829 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 830 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 831 | /* |
| 832 | * the item was found, so new blocks were not added to the file |
| 833 | * there is no need to make sure the inode is updated with this |
| 834 | * transaction |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 836 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 837 | } |
| 838 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 839 | if (!th) { |
| 840 | pathrelse(&path); |
| 841 | goto start_trans; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 844 | /* |
| 845 | * desired position is not found or is in the direct item. We have |
| 846 | * to append file with holes up to 'block'-th block converting |
| 847 | * direct items to indirect one if necessary |
| 848 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 849 | done = 0; |
| 850 | do { |
| 851 | if (is_statdata_le_ih(ih)) { |
| 852 | __le32 unp = 0; |
| 853 | struct cpu_key tmp_key; |
| 854 | |
| 855 | /* indirect item has to be inserted */ |
| 856 | make_le_item_head(&tmp_ih, &key, version, 1, |
| 857 | TYPE_INDIRECT, UNFM_P_SIZE, |
| 858 | 0 /* free_space */ ); |
| 859 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 860 | /* |
| 861 | * we are going to add 'block'-th block to the file. |
| 862 | * Use allocated block for that |
| 863 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 864 | if (cpu_key_k_offset(&key) == 1) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 865 | unp = cpu_to_le32(allocated_block_nr); |
| 866 | set_block_dev_mapped(bh_result, |
| 867 | allocated_block_nr, inode); |
| 868 | set_buffer_new(bh_result); |
| 869 | done = 1; |
| 870 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 871 | tmp_key = key; /* ;) */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 872 | set_cpu_key_k_offset(&tmp_key, 1); |
| 873 | PATH_LAST_POSITION(&path)++; |
| 874 | |
| 875 | retval = |
| 876 | reiserfs_insert_item(th, &path, &tmp_key, &tmp_ih, |
| 877 | inode, (char *)&unp); |
| 878 | if (retval) { |
| 879 | reiserfs_free_block(th, inode, |
| 880 | allocated_block_nr, 1); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 881 | /* |
| 882 | * retval == -ENOSPC, -EDQUOT or -EIO |
| 883 | * or -EEXIST |
| 884 | */ |
| 885 | goto failure; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 886 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 887 | } else if (is_direct_le_ih(ih)) { |
| 888 | /* direct item has to be converted */ |
| 889 | loff_t tail_offset; |
| 890 | |
| 891 | tail_offset = |
| 892 | ((le_ih_k_offset(ih) - |
| 893 | 1) & ~(inode->i_sb->s_blocksize - 1)) + 1; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 894 | |
| 895 | /* |
| 896 | * direct item we just found fits into block we have |
| 897 | * to map. Convert it into unformatted node: use |
| 898 | * bh_result for the conversion |
| 899 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 900 | if (tail_offset == cpu_key_k_offset(&key)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 901 | set_block_dev_mapped(bh_result, |
| 902 | allocated_block_nr, inode); |
| 903 | unbh = bh_result; |
| 904 | done = 1; |
| 905 | } else { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 906 | /* |
| 907 | * we have to pad file tail stored in direct |
| 908 | * item(s) up to block size and convert it |
| 909 | * to unformatted node. FIXME: this should |
| 910 | * also get into page cache |
| 911 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 912 | |
| 913 | pathrelse(&path); |
| 914 | /* |
| 915 | * ugly, but we can only end the transaction if |
| 916 | * we aren't nested |
| 917 | */ |
| 918 | BUG_ON(!th->t_refcount); |
| 919 | if (th->t_refcount == 1) { |
| 920 | retval = |
| 921 | reiserfs_end_persistent_transaction |
| 922 | (th); |
| 923 | th = NULL; |
| 924 | if (retval) |
| 925 | goto failure; |
| 926 | } |
| 927 | |
| 928 | retval = |
| 929 | convert_tail_for_hole(inode, bh_result, |
| 930 | tail_offset); |
| 931 | if (retval) { |
| 932 | if (retval != -ENOSPC) |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 933 | reiserfs_error(inode->i_sb, |
| 934 | "clm-6004", |
| 935 | "convert tail failed " |
| 936 | "inode %lu, error %d", |
| 937 | inode->i_ino, |
| 938 | retval); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 939 | if (allocated_block_nr) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 940 | /* |
| 941 | * the bitmap, the super, |
| 942 | * and the stat data == 3 |
| 943 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 944 | if (!th) |
| 945 | th = reiserfs_persistent_transaction(inode->i_sb, 3); |
| 946 | if (th) |
| 947 | reiserfs_free_block(th, |
| 948 | inode, |
| 949 | allocated_block_nr, |
| 950 | 1); |
| 951 | } |
| 952 | goto failure; |
| 953 | } |
| 954 | goto research; |
| 955 | } |
| 956 | retval = |
| 957 | direct2indirect(th, inode, &path, unbh, |
| 958 | tail_offset); |
| 959 | if (retval) { |
| 960 | reiserfs_unmap_buffer(unbh); |
| 961 | reiserfs_free_block(th, inode, |
| 962 | allocated_block_nr, 1); |
| 963 | goto failure; |
| 964 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 965 | /* |
| 966 | * it is important the set_buffer_uptodate is done |
| 967 | * after the direct2indirect. The buffer might |
| 968 | * contain valid data newer than the data on disk |
| 969 | * (read by readpage, changed, and then sent here by |
| 970 | * writepage). direct2indirect needs to know if unbh |
| 971 | * was already up to date, so it can decide if the |
| 972 | * data in unbh needs to be replaced with data from |
| 973 | * the disk |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 974 | */ |
| 975 | set_buffer_uptodate(unbh); |
| 976 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 977 | /* |
| 978 | * unbh->b_page == NULL in case of DIRECT_IO request, |
| 979 | * this means buffer will disappear shortly, so it |
| 980 | * should not be added to |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 981 | */ |
| 982 | if (unbh->b_page) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 983 | /* |
| 984 | * we've converted the tail, so we must |
| 985 | * flush unbh before the transaction commits |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 986 | */ |
| 987 | reiserfs_add_tail_list(inode, unbh); |
| 988 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 989 | /* |
| 990 | * mark it dirty now to prevent commit_write |
| 991 | * from adding this buffer to the inode's |
| 992 | * dirty buffer list |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 993 | */ |
| 994 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 995 | * AKPM: changed __mark_buffer_dirty to |
| 996 | * mark_buffer_dirty(). It's still atomic, |
| 997 | * but it sets the page dirty too, which makes |
| 998 | * it eligible for writeback at any time by the |
| 999 | * VM (which was also the case with |
| 1000 | * __mark_buffer_dirty()) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1001 | */ |
| 1002 | mark_buffer_dirty(unbh); |
| 1003 | } |
| 1004 | } else { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1005 | /* |
| 1006 | * append indirect item with holes if needed, when |
| 1007 | * appending pointer to 'block'-th block use block, |
| 1008 | * which is already allocated |
| 1009 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1010 | struct cpu_key tmp_key; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1011 | /* |
| 1012 | * We use this in case we need to allocate |
| 1013 | * only one block which is a fastpath |
| 1014 | */ |
| 1015 | unp_t unf_single = 0; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1016 | unp_t *un; |
| 1017 | __u64 max_to_insert = |
| 1018 | MAX_ITEM_LEN(inode->i_sb->s_blocksize) / |
| 1019 | UNFM_P_SIZE; |
| 1020 | __u64 blocks_needed; |
| 1021 | |
| 1022 | RFALSE(pos_in_item != ih_item_len(ih) / UNFM_P_SIZE, |
| 1023 | "vs-804: invalid position for append"); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1024 | /* |
| 1025 | * indirect item has to be appended, |
| 1026 | * set up key of that position |
| 1027 | * (key type is unimportant) |
| 1028 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1029 | make_cpu_key(&tmp_key, inode, |
| 1030 | le_key_k_offset(version, |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 1031 | &ih->ih_key) + |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1032 | op_bytes_number(ih, |
| 1033 | inode->i_sb->s_blocksize), |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1034 | TYPE_INDIRECT, 3); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1035 | |
Vladimir V. Saveliev | c499ec2 | 2006-03-02 02:54:39 -0800 | [diff] [blame] | 1036 | RFALSE(cpu_key_k_offset(&tmp_key) > cpu_key_k_offset(&key), |
| 1037 | "green-805: invalid offset"); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1038 | blocks_needed = |
| 1039 | 1 + |
| 1040 | ((cpu_key_k_offset(&key) - |
| 1041 | cpu_key_k_offset(&tmp_key)) >> inode->i_sb-> |
| 1042 | s_blocksize_bits); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1043 | |
| 1044 | if (blocks_needed == 1) { |
| 1045 | un = &unf_single; |
| 1046 | } else { |
Kees Cook | 6396bb2 | 2018-06-12 14:03:40 -0700 | [diff] [blame] | 1047 | un = kcalloc(min(blocks_needed, max_to_insert), |
| 1048 | UNFM_P_SIZE, GFP_NOFS); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1049 | if (!un) { |
| 1050 | un = &unf_single; |
| 1051 | blocks_needed = 1; |
| 1052 | max_to_insert = 0; |
Yan Burman | 01afb21 | 2006-12-06 20:39:01 -0800 | [diff] [blame] | 1053 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1054 | } |
| 1055 | if (blocks_needed <= max_to_insert) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1056 | /* |
| 1057 | * we are going to add target block to |
| 1058 | * the file. Use allocated block for that |
| 1059 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1060 | un[blocks_needed - 1] = |
| 1061 | cpu_to_le32(allocated_block_nr); |
| 1062 | set_block_dev_mapped(bh_result, |
| 1063 | allocated_block_nr, inode); |
| 1064 | set_buffer_new(bh_result); |
| 1065 | done = 1; |
| 1066 | } else { |
| 1067 | /* paste hole to the indirect item */ |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1068 | /* |
| 1069 | * If kmalloc failed, max_to_insert becomes |
| 1070 | * zero and it means we only have space for |
| 1071 | * one block |
| 1072 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1073 | blocks_needed = |
| 1074 | max_to_insert ? max_to_insert : 1; |
| 1075 | } |
| 1076 | retval = |
| 1077 | reiserfs_paste_into_item(th, &path, &tmp_key, inode, |
| 1078 | (char *)un, |
| 1079 | UNFM_P_SIZE * |
| 1080 | blocks_needed); |
| 1081 | |
| 1082 | if (blocks_needed != 1) |
| 1083 | kfree(un); |
| 1084 | |
| 1085 | if (retval) { |
| 1086 | reiserfs_free_block(th, inode, |
| 1087 | allocated_block_nr, 1); |
| 1088 | goto failure; |
| 1089 | } |
| 1090 | if (!done) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1091 | /* |
| 1092 | * We need to mark new file size in case |
| 1093 | * this function will be interrupted/aborted |
| 1094 | * later on. And we may do this only for |
| 1095 | * holes. |
| 1096 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1097 | inode->i_size += |
| 1098 | inode->i_sb->s_blocksize * blocks_needed; |
| 1099 | } |
| 1100 | } |
| 1101 | |
| 1102 | if (done == 1) |
| 1103 | break; |
| 1104 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1105 | /* |
| 1106 | * this loop could log more blocks than we had originally |
| 1107 | * asked for. So, we have to allow the transaction to end |
| 1108 | * if it is too big or too full. Update the inode so things |
| 1109 | * are consistent if we crash before the function returns |
| 1110 | * release the path so that anybody waiting on the path before |
| 1111 | * ending their transaction will be able to continue. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1112 | */ |
| 1113 | if (journal_transaction_should_end(th, th->t_blocks_allocated)) { |
| 1114 | retval = restart_transaction(th, inode, &path); |
| 1115 | if (retval) |
| 1116 | goto failure; |
| 1117 | } |
Frederic Weisbecker | 8ebc423 | 2009-04-07 04:19:49 +0200 | [diff] [blame] | 1118 | /* |
| 1119 | * inserting indirect pointers for a hole can take a |
| 1120 | * long time. reschedule if needed and also release the write |
| 1121 | * lock for others. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1122 | */ |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1123 | reiserfs_cond_resched(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1124 | |
| 1125 | retval = search_for_position_by_key(inode->i_sb, &key, &path); |
| 1126 | if (retval == IO_ERROR) { |
| 1127 | retval = -EIO; |
| 1128 | goto failure; |
| 1129 | } |
| 1130 | if (retval == POSITION_FOUND) { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1131 | reiserfs_warning(inode->i_sb, "vs-825", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1132 | "%K should not be found", &key); |
| 1133 | retval = -EEXIST; |
| 1134 | if (allocated_block_nr) |
| 1135 | reiserfs_free_block(th, inode, |
| 1136 | allocated_block_nr, 1); |
| 1137 | pathrelse(&path); |
| 1138 | goto failure; |
| 1139 | } |
| 1140 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1141 | ih = tp_item_head(&path); |
| 1142 | item = tp_item_body(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1143 | pos_in_item = path.pos_in_item; |
| 1144 | } while (1); |
| 1145 | |
| 1146 | retval = 0; |
| 1147 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 1148 | failure: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1149 | if (th && (!dangle || (retval && !th->t_trans_id))) { |
| 1150 | int err; |
| 1151 | if (th->t_trans_id) |
| 1152 | reiserfs_update_sd(th, inode); |
| 1153 | err = reiserfs_end_persistent_transaction(th); |
| 1154 | if (err) |
| 1155 | retval = err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1156 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1157 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1158 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1159 | reiserfs_check_path(&path); |
| 1160 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | } |
| 1162 | |
| 1163 | static int |
| 1164 | reiserfs_readpages(struct file *file, struct address_space *mapping, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1165 | struct list_head *pages, unsigned nr_pages) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1167 | return mpage_readpages(mapping, pages, nr_pages, reiserfs_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1168 | } |
| 1169 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1170 | /* |
| 1171 | * Compute real number of used bytes by file |
| 1172 | * Following three functions can go away when we'll have enough space in |
| 1173 | * stat item |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | */ |
| 1175 | static int real_space_diff(struct inode *inode, int sd_size) |
| 1176 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1177 | int bytes; |
| 1178 | loff_t blocksize = inode->i_sb->s_blocksize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1180 | if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) |
| 1181 | return sd_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1183 | /* |
| 1184 | * End of file is also in full block with indirect reference, so round |
| 1185 | * up to the next block. |
| 1186 | * |
| 1187 | * there is just no way to know if the tail is actually packed |
| 1188 | * on the file, so we have to assume it isn't. When we pack the |
| 1189 | * tail, we add 4 bytes to pretend there really is an unformatted |
| 1190 | * node pointer |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1191 | */ |
| 1192 | bytes = |
| 1193 | ((inode->i_size + |
| 1194 | (blocksize - 1)) >> inode->i_sb->s_blocksize_bits) * UNFM_P_SIZE + |
| 1195 | sd_size; |
| 1196 | return bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | static inline loff_t to_real_used_space(struct inode *inode, ulong blocks, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1200 | int sd_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1202 | if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) { |
| 1203 | return inode->i_size + |
| 1204 | (loff_t) (real_space_diff(inode, sd_size)); |
| 1205 | } |
| 1206 | return ((loff_t) real_space_diff(inode, sd_size)) + |
| 1207 | (((loff_t) blocks) << 9); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | } |
| 1209 | |
| 1210 | /* Compute number of blocks used by file in ReiserFS counting */ |
| 1211 | static inline ulong to_fake_used_blocks(struct inode *inode, int sd_size) |
| 1212 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1213 | loff_t bytes = inode_get_bytes(inode); |
| 1214 | loff_t real_space = real_space_diff(inode, sd_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1216 | /* keeps fsck and non-quota versions of reiserfs happy */ |
| 1217 | if (S_ISLNK(inode->i_mode) || S_ISDIR(inode->i_mode)) { |
| 1218 | bytes += (loff_t) 511; |
| 1219 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1220 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1221 | /* |
| 1222 | * files from before the quota patch might i_blocks such that |
| 1223 | * bytes < real_space. Deal with that here to prevent it from |
| 1224 | * going negative. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1225 | */ |
| 1226 | if (bytes < real_space) |
| 1227 | return 0; |
| 1228 | return (bytes - real_space) >> 9; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1229 | } |
| 1230 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1231 | /* |
| 1232 | * BAD: new directories have stat data of new type and all other items |
| 1233 | * of old type. Version stored in the inode says about body items, so |
| 1234 | * in update_stat_data we can not rely on inode, but have to check |
| 1235 | * item version directly |
| 1236 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1237 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1238 | /* called by read_locked_inode */ |
Josef "Jeff" Sipek | fec6d05 | 2006-12-08 02:36:32 -0800 | [diff] [blame] | 1239 | static void init_inode(struct inode *inode, struct treepath *path) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1240 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1241 | struct buffer_head *bh; |
| 1242 | struct item_head *ih; |
| 1243 | __u32 rdev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1245 | bh = PATH_PLAST_BUFFER(path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1246 | ih = tp_item_head(path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1247 | |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 1248 | copy_key(INODE_PKEY(inode), &ih->ih_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 1250 | INIT_LIST_HEAD(&REISERFS_I(inode)->i_prealloc_list); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1251 | REISERFS_I(inode)->i_flags = 0; |
| 1252 | REISERFS_I(inode)->i_prealloc_block = 0; |
| 1253 | REISERFS_I(inode)->i_prealloc_count = 0; |
| 1254 | REISERFS_I(inode)->i_trans_id = 0; |
| 1255 | REISERFS_I(inode)->i_jl = NULL; |
Alexey Dobriyan | 068fbb3 | 2006-09-29 01:59:58 -0700 | [diff] [blame] | 1256 | reiserfs_init_xattr_rwsem(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1258 | if (stat_data_v1(ih)) { |
| 1259 | struct stat_data_v1 *sd = |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1260 | (struct stat_data_v1 *)ih_item_body(bh, ih); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1261 | unsigned long blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1263 | set_inode_item_key_version(inode, KEY_FORMAT_3_5); |
| 1264 | set_inode_sd_version(inode, STAT_DATA_V1); |
| 1265 | inode->i_mode = sd_v1_mode(sd); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1266 | set_nlink(inode, sd_v1_nlink(sd)); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1267 | i_uid_write(inode, sd_v1_uid(sd)); |
| 1268 | i_gid_write(inode, sd_v1_gid(sd)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1269 | inode->i_size = sd_v1_size(sd); |
| 1270 | inode->i_atime.tv_sec = sd_v1_atime(sd); |
| 1271 | inode->i_mtime.tv_sec = sd_v1_mtime(sd); |
| 1272 | inode->i_ctime.tv_sec = sd_v1_ctime(sd); |
| 1273 | inode->i_atime.tv_nsec = 0; |
| 1274 | inode->i_ctime.tv_nsec = 0; |
| 1275 | inode->i_mtime.tv_nsec = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1277 | inode->i_blocks = sd_v1_blocks(sd); |
| 1278 | inode->i_generation = le32_to_cpu(INODE_PKEY(inode)->k_dir_id); |
| 1279 | blocks = (inode->i_size + 511) >> 9; |
| 1280 | blocks = _ROUND_UP(blocks, inode->i_sb->s_blocksize >> 9); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1281 | |
| 1282 | /* |
| 1283 | * there was a bug in <=3.5.23 when i_blocks could take |
| 1284 | * negative values. Starting from 3.5.17 this value could |
| 1285 | * even be stored in stat data. For such files we set |
| 1286 | * i_blocks based on file size. Just 2 notes: this can be |
| 1287 | * wrong for sparse files. On-disk value will be only |
| 1288 | * updated if file's inode will ever change |
| 1289 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1290 | if (inode->i_blocks > blocks) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1291 | inode->i_blocks = blocks; |
| 1292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1294 | rdev = sd_v1_rdev(sd); |
| 1295 | REISERFS_I(inode)->i_first_direct_byte = |
| 1296 | sd_v1_first_direct_byte(sd); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1297 | |
| 1298 | /* |
| 1299 | * an early bug in the quota code can give us an odd |
| 1300 | * number for the block count. This is incorrect, fix it here. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1301 | */ |
| 1302 | if (inode->i_blocks & 1) { |
| 1303 | inode->i_blocks++; |
| 1304 | } |
| 1305 | inode_set_bytes(inode, |
| 1306 | to_real_used_space(inode, inode->i_blocks, |
| 1307 | SD_V1_SIZE)); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1308 | /* |
| 1309 | * nopack is initially zero for v1 objects. For v2 objects, |
| 1310 | * nopack is initialised from sd_attrs |
| 1311 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1312 | REISERFS_I(inode)->i_flags &= ~i_nopack_mask; |
| 1313 | } else { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1314 | /* |
| 1315 | * new stat data found, but object may have old items |
| 1316 | * (directories and symlinks) |
| 1317 | */ |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1318 | struct stat_data *sd = (struct stat_data *)ih_item_body(bh, ih); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1319 | |
| 1320 | inode->i_mode = sd_v2_mode(sd); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1321 | set_nlink(inode, sd_v2_nlink(sd)); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1322 | i_uid_write(inode, sd_v2_uid(sd)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1323 | inode->i_size = sd_v2_size(sd); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1324 | i_gid_write(inode, sd_v2_gid(sd)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1325 | inode->i_mtime.tv_sec = sd_v2_mtime(sd); |
| 1326 | inode->i_atime.tv_sec = sd_v2_atime(sd); |
| 1327 | inode->i_ctime.tv_sec = sd_v2_ctime(sd); |
| 1328 | inode->i_ctime.tv_nsec = 0; |
| 1329 | inode->i_mtime.tv_nsec = 0; |
| 1330 | inode->i_atime.tv_nsec = 0; |
| 1331 | inode->i_blocks = sd_v2_blocks(sd); |
| 1332 | rdev = sd_v2_rdev(sd); |
| 1333 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 1334 | inode->i_generation = |
| 1335 | le32_to_cpu(INODE_PKEY(inode)->k_dir_id); |
| 1336 | else |
| 1337 | inode->i_generation = sd_v2_generation(sd); |
| 1338 | |
| 1339 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) |
| 1340 | set_inode_item_key_version(inode, KEY_FORMAT_3_5); |
| 1341 | else |
| 1342 | set_inode_item_key_version(inode, KEY_FORMAT_3_6); |
| 1343 | REISERFS_I(inode)->i_first_direct_byte = 0; |
| 1344 | set_inode_sd_version(inode, STAT_DATA_V2); |
| 1345 | inode_set_bytes(inode, |
| 1346 | to_real_used_space(inode, inode->i_blocks, |
| 1347 | SD_V2_SIZE)); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1348 | /* |
| 1349 | * read persistent inode attributes from sd and initialise |
| 1350 | * generic inode flags from them |
| 1351 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1352 | REISERFS_I(inode)->i_attrs = sd_v2_attrs(sd); |
| 1353 | sd_attrs_to_i_attrs(sd_v2_attrs(sd), inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | } |
| 1355 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1356 | pathrelse(path); |
| 1357 | if (S_ISREG(inode->i_mode)) { |
| 1358 | inode->i_op = &reiserfs_file_inode_operations; |
| 1359 | inode->i_fop = &reiserfs_file_operations; |
| 1360 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; |
| 1361 | } else if (S_ISDIR(inode->i_mode)) { |
| 1362 | inode->i_op = &reiserfs_dir_inode_operations; |
| 1363 | inode->i_fop = &reiserfs_dir_operations; |
| 1364 | } else if (S_ISLNK(inode->i_mode)) { |
| 1365 | inode->i_op = &reiserfs_symlink_inode_operations; |
Al Viro | 21fc61c | 2015-11-17 01:07:57 -0500 | [diff] [blame] | 1366 | inode_nohighmem(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1367 | inode->i_mapping->a_ops = &reiserfs_address_space_operations; |
| 1368 | } else { |
| 1369 | inode->i_blocks = 0; |
| 1370 | inode->i_op = &reiserfs_special_inode_operations; |
| 1371 | init_special_inode(inode, inode->i_mode, new_decode_dev(rdev)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | } |
| 1374 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1375 | /* update new stat data with inode fields */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1376 | static void inode2sd(void *sd, struct inode *inode, loff_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1377 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1378 | struct stat_data *sd_v2 = (struct stat_data *)sd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1380 | set_sd_v2_mode(sd_v2, inode->i_mode); |
| 1381 | set_sd_v2_nlink(sd_v2, inode->i_nlink); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1382 | set_sd_v2_uid(sd_v2, i_uid_read(inode)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1383 | set_sd_v2_size(sd_v2, size); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1384 | set_sd_v2_gid(sd_v2, i_gid_read(inode)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1385 | set_sd_v2_mtime(sd_v2, inode->i_mtime.tv_sec); |
| 1386 | set_sd_v2_atime(sd_v2, inode->i_atime.tv_sec); |
| 1387 | set_sd_v2_ctime(sd_v2, inode->i_ctime.tv_sec); |
| 1388 | set_sd_v2_blocks(sd_v2, to_fake_used_blocks(inode, SD_V2_SIZE)); |
| 1389 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 1390 | set_sd_v2_rdev(sd_v2, new_encode_dev(inode->i_rdev)); |
| 1391 | else |
| 1392 | set_sd_v2_generation(sd_v2, inode->i_generation); |
Jan Kara | a480b5b | 2017-04-11 16:51:34 +0200 | [diff] [blame] | 1393 | set_sd_v2_attrs(sd_v2, REISERFS_I(inode)->i_attrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1394 | } |
| 1395 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1396 | /* used to copy inode's fields to old stat data */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1397 | static void inode2sd_v1(void *sd, struct inode *inode, loff_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1398 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1399 | struct stat_data_v1 *sd_v1 = (struct stat_data_v1 *)sd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1401 | set_sd_v1_mode(sd_v1, inode->i_mode); |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 1402 | set_sd_v1_uid(sd_v1, i_uid_read(inode)); |
| 1403 | set_sd_v1_gid(sd_v1, i_gid_read(inode)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1404 | set_sd_v1_nlink(sd_v1, inode->i_nlink); |
| 1405 | set_sd_v1_size(sd_v1, size); |
| 1406 | set_sd_v1_atime(sd_v1, inode->i_atime.tv_sec); |
| 1407 | set_sd_v1_ctime(sd_v1, inode->i_ctime.tv_sec); |
| 1408 | set_sd_v1_mtime(sd_v1, inode->i_mtime.tv_sec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1409 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1410 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 1411 | set_sd_v1_rdev(sd_v1, new_encode_dev(inode->i_rdev)); |
| 1412 | else |
| 1413 | set_sd_v1_blocks(sd_v1, to_fake_used_blocks(inode, SD_V1_SIZE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1415 | /* Sigh. i_first_direct_byte is back */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1416 | set_sd_v1_first_direct_byte(sd_v1, |
| 1417 | REISERFS_I(inode)->i_first_direct_byte); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | } |
| 1419 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1420 | /* |
| 1421 | * NOTE, you must prepare the buffer head before sending it here, |
| 1422 | * and then log it after the call |
| 1423 | */ |
Josef "Jeff" Sipek | fec6d05 | 2006-12-08 02:36:32 -0800 | [diff] [blame] | 1424 | static void update_stat_data(struct treepath *path, struct inode *inode, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1425 | loff_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1426 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1427 | struct buffer_head *bh; |
| 1428 | struct item_head *ih; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1430 | bh = PATH_PLAST_BUFFER(path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1431 | ih = tp_item_head(path); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1432 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1433 | if (!is_statdata_le_ih(ih)) |
Jeff Mahoney | c3a9c21 | 2009-03-30 14:02:25 -0400 | [diff] [blame] | 1434 | reiserfs_panic(inode->i_sb, "vs-13065", "key %k, found item %h", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1435 | INODE_PKEY(inode), ih); |
| 1436 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1437 | /* path points to old stat data */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1438 | if (stat_data_v1(ih)) { |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1439 | inode2sd_v1(ih_item_body(bh, ih), inode, size); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1440 | } else { |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1441 | inode2sd(ih_item_body(bh, ih), inode, size); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1442 | } |
| 1443 | |
| 1444 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1445 | } |
| 1446 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1447 | void reiserfs_update_sd_size(struct reiserfs_transaction_handle *th, |
| 1448 | struct inode *inode, loff_t size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1450 | struct cpu_key key; |
| 1451 | INITIALIZE_PATH(path); |
| 1452 | struct buffer_head *bh; |
| 1453 | int fs_gen; |
| 1454 | struct item_head *ih, tmp_ih; |
| 1455 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1457 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1458 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1459 | /* key type is unimportant */ |
| 1460 | make_cpu_key(&key, inode, SD_OFFSET, TYPE_STAT_DATA, 3); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1461 | |
| 1462 | for (;;) { |
| 1463 | int pos; |
| 1464 | /* look for the object's stat data */ |
| 1465 | retval = search_item(inode->i_sb, &key, &path); |
| 1466 | if (retval == IO_ERROR) { |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 1467 | reiserfs_error(inode->i_sb, "vs-13050", |
| 1468 | "i/o failure occurred trying to " |
| 1469 | "update %K stat data", &key); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1470 | return; |
| 1471 | } |
| 1472 | if (retval == ITEM_NOT_FOUND) { |
| 1473 | pos = PATH_LAST_POSITION(&path); |
| 1474 | pathrelse(&path); |
| 1475 | if (inode->i_nlink == 0) { |
| 1476 | /*reiserfs_warning (inode->i_sb, "vs-13050: reiserfs_update_sd: i_nlink == 0, stat data not found"); */ |
| 1477 | return; |
| 1478 | } |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1479 | reiserfs_warning(inode->i_sb, "vs-13060", |
| 1480 | "stat data of object %k (nlink == %d) " |
| 1481 | "not found (pos %d)", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1482 | INODE_PKEY(inode), inode->i_nlink, |
| 1483 | pos); |
| 1484 | reiserfs_check_path(&path); |
| 1485 | return; |
| 1486 | } |
| 1487 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1488 | /* |
| 1489 | * sigh, prepare_for_journal might schedule. When it |
| 1490 | * schedules the FS might change. We have to detect that, |
| 1491 | * and loop back to the search if the stat data item has moved |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1492 | */ |
| 1493 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 1494 | ih = tp_item_head(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1495 | copy_item_head(&tmp_ih, ih); |
| 1496 | fs_gen = get_generation(inode->i_sb); |
| 1497 | reiserfs_prepare_for_journal(inode->i_sb, bh, 1); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1498 | |
| 1499 | /* Stat_data item has been moved after scheduling. */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1500 | if (fs_changed(fs_gen, inode->i_sb) |
| 1501 | && item_moved(&tmp_ih, &path)) { |
| 1502 | reiserfs_restore_prepared_buffer(inode->i_sb, bh); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1503 | continue; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1504 | } |
| 1505 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1506 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1507 | update_stat_data(&path, inode, size); |
Jeff Mahoney | 09f1b80 | 2014-04-23 10:00:39 -0400 | [diff] [blame] | 1508 | journal_mark_dirty(th, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1509 | pathrelse(&path); |
| 1510 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | } |
| 1512 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1513 | /* |
| 1514 | * reiserfs_read_locked_inode is called to read the inode off disk, and it |
| 1515 | * does a make_bad_inode when things go wrong. But, we need to make sure |
| 1516 | * and clear the key in the private portion of the inode, otherwise a |
| 1517 | * corresponding iput might try to delete whatever object the inode last |
| 1518 | * represented. |
| 1519 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1520 | static void reiserfs_make_bad_inode(struct inode *inode) |
| 1521 | { |
| 1522 | memset(INODE_PKEY(inode), 0, KEY_SIZE); |
| 1523 | make_bad_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | } |
| 1525 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1526 | /* |
| 1527 | * initially this function was derived from minix or ext2's analog and |
| 1528 | * evolved as the prototype did |
| 1529 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1530 | int reiserfs_init_locked_inode(struct inode *inode, void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1531 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1532 | struct reiserfs_iget_args *args = (struct reiserfs_iget_args *)p; |
| 1533 | inode->i_ino = args->objectid; |
| 1534 | INODE_PKEY(inode)->k_dir_id = cpu_to_le32(args->dirid); |
| 1535 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | } |
| 1537 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1538 | /* |
| 1539 | * looks for stat data in the tree, and fills up the fields of in-core |
| 1540 | * inode stat data fields |
| 1541 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1542 | void reiserfs_read_locked_inode(struct inode *inode, |
| 1543 | struct reiserfs_iget_args *args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1545 | INITIALIZE_PATH(path_to_sd); |
| 1546 | struct cpu_key key; |
| 1547 | unsigned long dirino; |
| 1548 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1550 | dirino = args->dirid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1551 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1552 | /* |
| 1553 | * set version 1, version 2 could be used too, because stat data |
| 1554 | * key is the same in both versions |
| 1555 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1556 | key.version = KEY_FORMAT_3_5; |
| 1557 | key.on_disk_key.k_dir_id = dirino; |
| 1558 | key.on_disk_key.k_objectid = inode->i_ino; |
| 1559 | key.on_disk_key.k_offset = 0; |
| 1560 | key.on_disk_key.k_type = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1562 | /* look for the object's stat data */ |
| 1563 | retval = search_item(inode->i_sb, &key, &path_to_sd); |
| 1564 | if (retval == IO_ERROR) { |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 1565 | reiserfs_error(inode->i_sb, "vs-13070", |
| 1566 | "i/o failure occurred trying to find " |
| 1567 | "stat data of %K", &key); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1568 | reiserfs_make_bad_inode(inode); |
| 1569 | return; |
| 1570 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1571 | |
| 1572 | /* a stale NFS handle can trigger this without it being an error */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1573 | if (retval != ITEM_FOUND) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1574 | pathrelse(&path_to_sd); |
| 1575 | reiserfs_make_bad_inode(inode); |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 1576 | clear_nlink(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1577 | return; |
| 1578 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1579 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1580 | init_inode(inode, &path_to_sd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1582 | /* |
| 1583 | * It is possible that knfsd is trying to access inode of a file |
| 1584 | * that is being removed from the disk by some other thread. As we |
| 1585 | * update sd on unlink all that is required is to check for nlink |
| 1586 | * here. This bug was first found by Sizif when debugging |
| 1587 | * SquidNG/Butterfly, forgotten, and found again after Philippe |
| 1588 | * Gramoulle <philippe.gramoulle@mmania.com> reproduced it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1590 | * More logical fix would require changes in fs/inode.c:iput() to |
| 1591 | * remove inode from hash-table _after_ fs cleaned disk stuff up and |
| 1592 | * in iget() to return NULL if I_FREEING inode is found in |
| 1593 | * hash-table. |
| 1594 | */ |
| 1595 | |
| 1596 | /* |
| 1597 | * Currently there is one place where it's ok to meet inode with |
| 1598 | * nlink==0: processing of open-unlinked and half-truncated files |
| 1599 | * during mount (fs/reiserfs/super.c:finish_unfinished()). |
| 1600 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1601 | if ((inode->i_nlink == 0) && |
| 1602 | !REISERFS_SB(inode->i_sb)->s_is_unlinked_ok) { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1603 | reiserfs_warning(inode->i_sb, "vs-13075", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1604 | "dead inode read from disk %K. " |
| 1605 | "This is likely to be race with knfsd. Ignore", |
| 1606 | &key); |
| 1607 | reiserfs_make_bad_inode(inode); |
| 1608 | } |
| 1609 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1610 | /* init inode should be relsing */ |
| 1611 | reiserfs_check_path(&path_to_sd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1612 | |
Christoph Hellwig | 4482a08 | 2011-07-23 17:37:03 +0200 | [diff] [blame] | 1613 | /* |
| 1614 | * Stat data v1 doesn't support ACLs. |
| 1615 | */ |
| 1616 | if (get_inode_sd_version(inode) == STAT_DATA_V1) |
| 1617 | cache_no_acl(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | } |
| 1619 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1620 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | * reiserfs_find_actor() - "find actor" reiserfs supplies to iget5_locked(). |
| 1622 | * |
| 1623 | * @inode: inode from hash table to check |
| 1624 | * @opaque: "cookie" passed to iget5_locked(). This is &reiserfs_iget_args. |
| 1625 | * |
| 1626 | * This function is called by iget5_locked() to distinguish reiserfs inodes |
| 1627 | * having the same inode numbers. Such inodes can only exist due to some |
| 1628 | * error condition. One of them should be bad. Inodes with identical |
| 1629 | * inode numbers (objectids) are distinguished by parent directory ids. |
| 1630 | * |
| 1631 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1632 | int reiserfs_find_actor(struct inode *inode, void *opaque) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1634 | struct reiserfs_iget_args *args; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1635 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1636 | args = opaque; |
| 1637 | /* args is already in CPU order */ |
| 1638 | return (inode->i_ino == args->objectid) && |
| 1639 | (le32_to_cpu(INODE_PKEY(inode)->k_dir_id) == args->dirid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | } |
| 1641 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1642 | struct inode *reiserfs_iget(struct super_block *s, const struct cpu_key *key) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1644 | struct inode *inode; |
| 1645 | struct reiserfs_iget_args args; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1646 | int depth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1647 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1648 | args.objectid = key->on_disk_key.k_objectid; |
| 1649 | args.dirid = key->on_disk_key.k_dir_id; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1650 | depth = reiserfs_write_unlock_nested(s); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1651 | inode = iget5_locked(s, key->on_disk_key.k_objectid, |
| 1652 | reiserfs_find_actor, reiserfs_init_locked_inode, |
| 1653 | (void *)(&args)); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1654 | reiserfs_write_lock_nested(s, depth); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1655 | if (!inode) |
| 1656 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1658 | if (inode->i_state & I_NEW) { |
| 1659 | reiserfs_read_locked_inode(inode, &args); |
| 1660 | unlock_new_inode(inode); |
| 1661 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1662 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1663 | if (comp_short_keys(INODE_PKEY(inode), key) || is_bad_inode(inode)) { |
| 1664 | /* either due to i/o error or a stale NFS handle */ |
| 1665 | iput(inode); |
| 1666 | inode = NULL; |
| 1667 | } |
| 1668 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1669 | } |
| 1670 | |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1671 | static struct dentry *reiserfs_get_dentry(struct super_block *sb, |
| 1672 | u32 objectid, u32 dir_id, u32 generation) |
| 1673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1675 | struct cpu_key key; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1676 | struct inode *inode; |
| 1677 | |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1678 | key.on_disk_key.k_objectid = objectid; |
| 1679 | key.on_disk_key.k_dir_id = dir_id; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1680 | reiserfs_write_lock(sb); |
| 1681 | inode = reiserfs_iget(sb, &key); |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1682 | if (inode && !IS_ERR(inode) && generation != 0 && |
| 1683 | generation != inode->i_generation) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1684 | iput(inode); |
| 1685 | inode = NULL; |
| 1686 | } |
| 1687 | reiserfs_write_unlock(sb); |
Christoph Hellwig | 4400372 | 2008-08-11 15:49:04 +0200 | [diff] [blame] | 1688 | |
| 1689 | return d_obtain_alias(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1692 | struct dentry *reiserfs_fh_to_dentry(struct super_block *sb, struct fid *fid, |
| 1693 | int fh_len, int fh_type) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1694 | { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1695 | /* |
| 1696 | * fhtype happens to reflect the number of u32s encoded. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1697 | * due to a bug in earlier code, fhtype might indicate there |
| 1698 | * are more u32s then actually fitted. |
| 1699 | * so if fhtype seems to be more than len, reduce fhtype. |
| 1700 | * Valid types are: |
| 1701 | * 2 - objectid + dir_id - legacy support |
| 1702 | * 3 - objectid + dir_id + generation |
| 1703 | * 4 - objectid + dir_id + objectid and dirid of parent - legacy |
| 1704 | * 5 - objectid + dir_id + generation + objectid and dirid of parent |
| 1705 | * 6 - as above plus generation of directory |
| 1706 | * 6 does not fit in NFSv2 handles |
| 1707 | */ |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1708 | if (fh_type > fh_len) { |
| 1709 | if (fh_type != 6 || fh_len != 5) |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1710 | reiserfs_warning(sb, "reiserfs-13077", |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1711 | "nfsd/reiserfs, fhtype=%d, len=%d - odd", |
| 1712 | fh_type, fh_len); |
Hugh Dickins | 35c2a7f | 2012-10-07 20:32:51 -0700 | [diff] [blame] | 1713 | fh_type = fh_len; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1714 | } |
Hugh Dickins | 35c2a7f | 2012-10-07 20:32:51 -0700 | [diff] [blame] | 1715 | if (fh_len < 2) |
| 1716 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1717 | |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1718 | return reiserfs_get_dentry(sb, fid->raw[0], fid->raw[1], |
| 1719 | (fh_type == 3 || fh_type >= 5) ? fid->raw[2] : 0); |
| 1720 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1722 | struct dentry *reiserfs_fh_to_parent(struct super_block *sb, struct fid *fid, |
| 1723 | int fh_len, int fh_type) |
| 1724 | { |
Hugh Dickins | 35c2a7f | 2012-10-07 20:32:51 -0700 | [diff] [blame] | 1725 | if (fh_type > fh_len) |
| 1726 | fh_type = fh_len; |
Christoph Hellwig | be55caf1 | 2007-10-21 16:42:13 -0700 | [diff] [blame] | 1727 | if (fh_type < 4) |
| 1728 | return NULL; |
| 1729 | |
| 1730 | return reiserfs_get_dentry(sb, |
| 1731 | (fh_type >= 5) ? fid->raw[3] : fid->raw[2], |
| 1732 | (fh_type >= 5) ? fid->raw[4] : fid->raw[3], |
| 1733 | (fh_type == 6) ? fid->raw[5] : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | } |
| 1735 | |
Al Viro | b0b0382 | 2012-04-02 14:34:06 -0400 | [diff] [blame] | 1736 | int reiserfs_encode_fh(struct inode *inode, __u32 * data, int *lenp, |
| 1737 | struct inode *parent) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1738 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1739 | int maxlen = *lenp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | |
Al Viro | b0b0382 | 2012-04-02 14:34:06 -0400 | [diff] [blame] | 1741 | if (parent && (maxlen < 5)) { |
Aneesh Kumar K.V | 5fe0c23 | 2011-01-29 18:43:25 +0530 | [diff] [blame] | 1742 | *lenp = 5; |
Namjae Jeon | 94e07a75 | 2013-02-17 15:48:11 +0900 | [diff] [blame] | 1743 | return FILEID_INVALID; |
Aneesh Kumar K.V | 5fe0c23 | 2011-01-29 18:43:25 +0530 | [diff] [blame] | 1744 | } else if (maxlen < 3) { |
| 1745 | *lenp = 3; |
Namjae Jeon | 94e07a75 | 2013-02-17 15:48:11 +0900 | [diff] [blame] | 1746 | return FILEID_INVALID; |
Aneesh Kumar K.V | 5fe0c23 | 2011-01-29 18:43:25 +0530 | [diff] [blame] | 1747 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1749 | data[0] = inode->i_ino; |
| 1750 | data[1] = le32_to_cpu(INODE_PKEY(inode)->k_dir_id); |
| 1751 | data[2] = inode->i_generation; |
| 1752 | *lenp = 3; |
Al Viro | b0b0382 | 2012-04-02 14:34:06 -0400 | [diff] [blame] | 1753 | if (parent) { |
| 1754 | data[3] = parent->i_ino; |
| 1755 | data[4] = le32_to_cpu(INODE_PKEY(parent)->k_dir_id); |
| 1756 | *lenp = 5; |
| 1757 | if (maxlen >= 6) { |
| 1758 | data[5] = parent->i_generation; |
| 1759 | *lenp = 6; |
| 1760 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1761 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1762 | return *lenp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1763 | } |
| 1764 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1765 | /* |
| 1766 | * looks for stat data, then copies fields to it, marks the buffer |
| 1767 | * containing stat data as dirty |
| 1768 | */ |
| 1769 | /* |
| 1770 | * reiserfs inodes are never really dirty, since the dirty inode call |
| 1771 | * always logs them. This call allows the VFS inode marking routines |
| 1772 | * to properly mark inodes for datasync and such, but only actually |
| 1773 | * does something when called for a synchronous update. |
| 1774 | */ |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 1775 | int reiserfs_write_inode(struct inode *inode, struct writeback_control *wbc) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1776 | { |
| 1777 | struct reiserfs_transaction_handle th; |
| 1778 | int jbegin_count = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1779 | |
David Howells | bc98a42 | 2017-07-17 08:45:34 +0100 | [diff] [blame] | 1780 | if (sb_rdonly(inode->i_sb)) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1781 | return -EROFS; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1782 | /* |
| 1783 | * memory pressure can sometimes initiate write_inode calls with |
| 1784 | * sync == 1, |
| 1785 | * these cases are just when the system needs ram, not when the |
| 1786 | * inode needs to reach disk for safety, and they can safely be |
| 1787 | * ignored because the altered inode has already been logged. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1788 | */ |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 1789 | if (wbc->sync_mode == WB_SYNC_ALL && !(current->flags & PF_MEMALLOC)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1790 | reiserfs_write_lock(inode->i_sb); |
| 1791 | if (!journal_begin(&th, inode->i_sb, jbegin_count)) { |
| 1792 | reiserfs_update_sd(&th, inode); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 1793 | journal_end_sync(&th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1794 | } |
| 1795 | reiserfs_write_unlock(inode->i_sb); |
| 1796 | } |
| 1797 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | } |
| 1799 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1800 | /* |
| 1801 | * stat data of new object is inserted already, this inserts the item |
| 1802 | * containing "." and ".." entries |
| 1803 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1804 | static int reiserfs_new_directory(struct reiserfs_transaction_handle *th, |
| 1805 | struct inode *inode, |
Josef "Jeff" Sipek | fec6d05 | 2006-12-08 02:36:32 -0800 | [diff] [blame] | 1806 | struct item_head *ih, struct treepath *path, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1807 | struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1809 | struct super_block *sb = th->t_super; |
| 1810 | char empty_dir[EMPTY_DIR_SIZE]; |
| 1811 | char *body = empty_dir; |
| 1812 | struct cpu_key key; |
| 1813 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1815 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1817 | _make_cpu_key(&key, KEY_FORMAT_3_5, le32_to_cpu(ih->ih_key.k_dir_id), |
| 1818 | le32_to_cpu(ih->ih_key.k_objectid), DOT_OFFSET, |
| 1819 | TYPE_DIRENTRY, 3 /*key length */ ); |
| 1820 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1821 | /* |
| 1822 | * compose item head for new item. Directories consist of items of |
| 1823 | * old type (ITEM_VERSION_1). Do not set key (second arg is 0), it |
| 1824 | * is done by reiserfs_new_inode |
| 1825 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1826 | if (old_format_only(sb)) { |
| 1827 | make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET, |
| 1828 | TYPE_DIRENTRY, EMPTY_DIR_SIZE_V1, 2); |
| 1829 | |
| 1830 | make_empty_dir_item_v1(body, ih->ih_key.k_dir_id, |
| 1831 | ih->ih_key.k_objectid, |
| 1832 | INODE_PKEY(dir)->k_dir_id, |
| 1833 | INODE_PKEY(dir)->k_objectid); |
| 1834 | } else { |
| 1835 | make_le_item_head(ih, NULL, KEY_FORMAT_3_5, DOT_OFFSET, |
| 1836 | TYPE_DIRENTRY, EMPTY_DIR_SIZE, 2); |
| 1837 | |
| 1838 | make_empty_dir_item(body, ih->ih_key.k_dir_id, |
| 1839 | ih->ih_key.k_objectid, |
| 1840 | INODE_PKEY(dir)->k_dir_id, |
| 1841 | INODE_PKEY(dir)->k_objectid); |
| 1842 | } |
| 1843 | |
| 1844 | /* look for place in the tree for new item */ |
| 1845 | retval = search_item(sb, &key, path); |
| 1846 | if (retval == IO_ERROR) { |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 1847 | reiserfs_error(sb, "vs-13080", |
| 1848 | "i/o failure occurred creating new directory"); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1849 | return -EIO; |
| 1850 | } |
| 1851 | if (retval == ITEM_FOUND) { |
| 1852 | pathrelse(path); |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1853 | reiserfs_warning(sb, "vs-13070", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1854 | "object with this key exists (%k)", |
| 1855 | &(ih->ih_key)); |
| 1856 | return -EEXIST; |
| 1857 | } |
| 1858 | |
| 1859 | /* insert item, that is empty directory item */ |
| 1860 | return reiserfs_insert_item(th, path, &key, ih, inode, body); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1861 | } |
| 1862 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1863 | /* |
| 1864 | * stat data of object has been inserted, this inserts the item |
| 1865 | * containing the body of symlink |
| 1866 | */ |
| 1867 | static int reiserfs_new_symlink(struct reiserfs_transaction_handle *th, |
| 1868 | struct inode *inode, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1869 | struct item_head *ih, |
Josef "Jeff" Sipek | fec6d05 | 2006-12-08 02:36:32 -0800 | [diff] [blame] | 1870 | struct treepath *path, const char *symname, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1871 | int item_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1873 | struct super_block *sb = th->t_super; |
| 1874 | struct cpu_key key; |
| 1875 | int retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1876 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1877 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1878 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1879 | _make_cpu_key(&key, KEY_FORMAT_3_5, |
| 1880 | le32_to_cpu(ih->ih_key.k_dir_id), |
| 1881 | le32_to_cpu(ih->ih_key.k_objectid), |
| 1882 | 1, TYPE_DIRECT, 3 /*key length */ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1884 | make_le_item_head(ih, NULL, KEY_FORMAT_3_5, 1, TYPE_DIRECT, item_len, |
| 1885 | 0 /*free_space */ ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1887 | /* look for place in the tree for new item */ |
| 1888 | retval = search_item(sb, &key, path); |
| 1889 | if (retval == IO_ERROR) { |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 1890 | reiserfs_error(sb, "vs-13080", |
| 1891 | "i/o failure occurred creating new symlink"); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1892 | return -EIO; |
| 1893 | } |
| 1894 | if (retval == ITEM_FOUND) { |
| 1895 | pathrelse(path); |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 1896 | reiserfs_warning(sb, "vs-13080", |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1897 | "object with this key exists (%k)", |
| 1898 | &(ih->ih_key)); |
| 1899 | return -EEXIST; |
| 1900 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1901 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1902 | /* insert item, that is body of symlink */ |
| 1903 | return reiserfs_insert_item(th, path, &key, ih, inode, symname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | } |
| 1905 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1906 | /* |
| 1907 | * inserts the stat data into the tree, and then calls |
| 1908 | * reiserfs_new_directory (to insert ".", ".." item if new object is |
| 1909 | * directory) or reiserfs_new_symlink (to insert symlink body if new |
| 1910 | * object is symlink) or nothing (if new object is regular file) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1911 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1912 | * NOTE! uid and gid must already be set in the inode. If we return |
| 1913 | * non-zero due to an error, we have to drop the quota previously allocated |
| 1914 | * for the fresh inode. This can only be done outside a transaction, so |
| 1915 | * if we return non-zero, we also end the transaction. |
| 1916 | * |
| 1917 | * @th: active transaction handle |
| 1918 | * @dir: parent directory for new inode |
| 1919 | * @mode: mode of new inode |
| 1920 | * @symname: symlink contents if inode is symlink |
| 1921 | * @isize: 0 for regular file, EMPTY_DIR_SIZE for dirs, strlen(symname) for |
| 1922 | * symlinks |
| 1923 | * @inode: inode to be filled |
| 1924 | * @security: optional security context to associate with this inode |
| 1925 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1926 | int reiserfs_new_inode(struct reiserfs_transaction_handle *th, |
Al Viro | 8e07189 | 2011-07-26 02:50:53 -0400 | [diff] [blame] | 1927 | struct inode *dir, umode_t mode, const char *symname, |
Jeff Mahoney | 0222e65 | 2009-03-30 14:02:44 -0400 | [diff] [blame] | 1928 | /* 0 for regular, EMTRY_DIR_SIZE for dirs, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1929 | strlen (symname) for symlinks) */ |
| 1930 | loff_t i_size, struct dentry *dentry, |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 1931 | struct inode *inode, |
| 1932 | struct reiserfs_security_handle *security) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | { |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 1934 | struct super_block *sb = dir->i_sb; |
Al Viro | c1eaa26 | 2008-12-30 02:03:58 -0500 | [diff] [blame] | 1935 | struct reiserfs_iget_args args; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1936 | INITIALIZE_PATH(path_to_key); |
| 1937 | struct cpu_key key; |
| 1938 | struct item_head ih; |
| 1939 | struct stat_data sd; |
| 1940 | int retval; |
| 1941 | int err; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1942 | int depth; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1944 | BUG_ON(!th->t_trans_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 1946 | depth = reiserfs_write_unlock_nested(sb); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1947 | err = dquot_alloc_inode(inode); |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 1948 | reiserfs_write_lock_nested(sb, depth); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 1949 | if (err) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1950 | goto out_end_trans; |
Eric Sesterhenn | 585b774 | 2006-10-04 02:15:30 -0700 | [diff] [blame] | 1951 | if (!dir->i_nlink) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1952 | err = -EPERM; |
| 1953 | goto out_bad_inode; |
| 1954 | } |
| 1955 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1956 | /* item head of new item */ |
| 1957 | ih.ih_key.k_dir_id = reiserfs_choose_packing(dir); |
| 1958 | ih.ih_key.k_objectid = cpu_to_le32(reiserfs_get_unused_objectid(th)); |
| 1959 | if (!ih.ih_key.k_objectid) { |
| 1960 | err = -ENOMEM; |
| 1961 | goto out_bad_inode; |
| 1962 | } |
Al Viro | c1eaa26 | 2008-12-30 02:03:58 -0500 | [diff] [blame] | 1963 | args.objectid = inode->i_ino = le32_to_cpu(ih.ih_key.k_objectid); |
Al Viro | 2f1169e | 2009-01-02 08:16:51 -0500 | [diff] [blame] | 1964 | if (old_format_only(sb)) |
| 1965 | make_le_item_head(&ih, NULL, KEY_FORMAT_3_5, SD_OFFSET, |
| 1966 | TYPE_STAT_DATA, SD_V1_SIZE, MAX_US_INT); |
| 1967 | else |
| 1968 | make_le_item_head(&ih, NULL, KEY_FORMAT_3_6, SD_OFFSET, |
| 1969 | TYPE_STAT_DATA, SD_SIZE, MAX_US_INT); |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 1970 | memcpy(INODE_PKEY(inode), &ih.ih_key, KEY_SIZE); |
Al Viro | c1eaa26 | 2008-12-30 02:03:58 -0500 | [diff] [blame] | 1971 | args.dirid = le32_to_cpu(ih.ih_key.k_dir_id); |
Jeff Mahoney | a1457c0 | 2013-05-31 15:51:17 -0400 | [diff] [blame] | 1972 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1973 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
Jeff Mahoney | a1457c0 | 2013-05-31 15:51:17 -0400 | [diff] [blame] | 1974 | err = insert_inode_locked4(inode, args.objectid, |
| 1975 | reiserfs_find_actor, &args); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 1976 | reiserfs_write_lock_nested(inode->i_sb, depth); |
Jeff Mahoney | a1457c0 | 2013-05-31 15:51:17 -0400 | [diff] [blame] | 1977 | if (err) { |
Al Viro | c1eaa26 | 2008-12-30 02:03:58 -0500 | [diff] [blame] | 1978 | err = -EINVAL; |
| 1979 | goto out_bad_inode; |
| 1980 | } |
Jeff Mahoney | a1457c0 | 2013-05-31 15:51:17 -0400 | [diff] [blame] | 1981 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1982 | if (old_format_only(sb)) |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 1983 | /* |
| 1984 | * not a perfect generation count, as object ids can be reused, |
| 1985 | * but this is as good as reiserfs can do right now. |
| 1986 | * note that the private part of inode isn't filled in yet, |
| 1987 | * we have to use the directory. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1988 | */ |
| 1989 | inode->i_generation = le32_to_cpu(INODE_PKEY(dir)->k_objectid); |
| 1990 | else |
| 1991 | #if defined( USE_INODE_GENERATION_COUNTER ) |
| 1992 | inode->i_generation = |
| 1993 | le32_to_cpu(REISERFS_SB(sb)->s_rs->s_inode_generation); |
| 1994 | #else |
| 1995 | inode->i_generation = ++event; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 1998 | /* fill stat data */ |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1999 | set_nlink(inode, (S_ISDIR(mode) ? 2 : 1)); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2000 | |
| 2001 | /* uid and gid must already be set by the caller for quota init */ |
| 2002 | |
Deepa Dinamani | 02027d4 | 2016-09-14 07:48:05 -0700 | [diff] [blame] | 2003 | inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2004 | inode->i_size = i_size; |
| 2005 | inode->i_blocks = 0; |
| 2006 | inode->i_bytes = 0; |
| 2007 | REISERFS_I(inode)->i_first_direct_byte = S_ISLNK(mode) ? 1 : |
| 2008 | U32_MAX /*NO_BYTES_IN_DIRECT_ITEM */ ; |
| 2009 | |
Jeff Mahoney | a228bf8 | 2014-04-23 10:00:42 -0400 | [diff] [blame] | 2010 | INIT_LIST_HEAD(&REISERFS_I(inode)->i_prealloc_list); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2011 | REISERFS_I(inode)->i_flags = 0; |
| 2012 | REISERFS_I(inode)->i_prealloc_block = 0; |
| 2013 | REISERFS_I(inode)->i_prealloc_count = 0; |
| 2014 | REISERFS_I(inode)->i_trans_id = 0; |
| 2015 | REISERFS_I(inode)->i_jl = NULL; |
| 2016 | REISERFS_I(inode)->i_attrs = |
| 2017 | REISERFS_I(dir)->i_attrs & REISERFS_INHERIT_MASK; |
| 2018 | sd_attrs_to_i_attrs(REISERFS_I(inode)->i_attrs, inode); |
Alexey Dobriyan | 068fbb3 | 2006-09-29 01:59:58 -0700 | [diff] [blame] | 2019 | reiserfs_init_xattr_rwsem(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2020 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2021 | /* key to search for correct place for new stat data */ |
| 2022 | _make_cpu_key(&key, KEY_FORMAT_3_6, le32_to_cpu(ih.ih_key.k_dir_id), |
| 2023 | le32_to_cpu(ih.ih_key.k_objectid), SD_OFFSET, |
| 2024 | TYPE_STAT_DATA, 3 /*key length */ ); |
| 2025 | |
| 2026 | /* find proper place for inserting of stat data */ |
| 2027 | retval = search_item(sb, &key, &path_to_key); |
| 2028 | if (retval == IO_ERROR) { |
| 2029 | err = -EIO; |
| 2030 | goto out_bad_inode; |
| 2031 | } |
| 2032 | if (retval == ITEM_FOUND) { |
| 2033 | pathrelse(&path_to_key); |
| 2034 | err = -EEXIST; |
| 2035 | goto out_bad_inode; |
| 2036 | } |
| 2037 | if (old_format_only(sb)) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2038 | /* i_uid or i_gid is too big to be stored in stat data v3.5 */ |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 2039 | if (i_uid_read(inode) & ~0xffff || i_gid_read(inode) & ~0xffff) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2040 | pathrelse(&path_to_key); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2041 | err = -EINVAL; |
| 2042 | goto out_bad_inode; |
| 2043 | } |
| 2044 | inode2sd_v1(&sd, inode, inode->i_size); |
| 2045 | } else { |
| 2046 | inode2sd(&sd, inode, inode->i_size); |
| 2047 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2048 | /* |
| 2049 | * store in in-core inode the key of stat data and version all |
| 2050 | * object items will have (directory items will have old offset |
| 2051 | * format, other new objects will consist of new items) |
| 2052 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2053 | if (old_format_only(sb) || S_ISDIR(mode) || S_ISLNK(mode)) |
| 2054 | set_inode_item_key_version(inode, KEY_FORMAT_3_5); |
| 2055 | else |
| 2056 | set_inode_item_key_version(inode, KEY_FORMAT_3_6); |
| 2057 | if (old_format_only(sb)) |
| 2058 | set_inode_sd_version(inode, STAT_DATA_V1); |
| 2059 | else |
| 2060 | set_inode_sd_version(inode, STAT_DATA_V2); |
| 2061 | |
| 2062 | /* insert the stat data into the tree */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2064 | if (REISERFS_I(dir)->new_packing_locality) |
| 2065 | th->displace_new_blocks = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | #endif |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2067 | retval = |
| 2068 | reiserfs_insert_item(th, &path_to_key, &key, &ih, inode, |
| 2069 | (char *)(&sd)); |
| 2070 | if (retval) { |
| 2071 | err = retval; |
| 2072 | reiserfs_check_path(&path_to_key); |
| 2073 | goto out_bad_inode; |
| 2074 | } |
| 2075 | #ifdef DISPLACE_NEW_PACKING_LOCALITIES |
| 2076 | if (!th->displace_new_blocks) |
| 2077 | REISERFS_I(dir)->new_packing_locality = 0; |
| 2078 | #endif |
| 2079 | if (S_ISDIR(mode)) { |
| 2080 | /* insert item with "." and ".." */ |
| 2081 | retval = |
| 2082 | reiserfs_new_directory(th, inode, &ih, &path_to_key, dir); |
| 2083 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2084 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2085 | if (S_ISLNK(mode)) { |
| 2086 | /* insert body of symlink */ |
| 2087 | if (!old_format_only(sb)) |
| 2088 | i_size = ROUND_UP(i_size); |
| 2089 | retval = |
| 2090 | reiserfs_new_symlink(th, inode, &ih, &path_to_key, symname, |
| 2091 | i_size); |
| 2092 | } |
| 2093 | if (retval) { |
| 2094 | err = retval; |
| 2095 | reiserfs_check_path(&path_to_key); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2096 | journal_end(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2097 | goto out_inserted_sd; |
| 2098 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2099 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2100 | if (reiserfs_posixacl(inode->i_sb)) { |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 2101 | reiserfs_write_unlock(inode->i_sb); |
Jeff Mahoney | 0ab2621 | 2009-03-30 14:02:39 -0400 | [diff] [blame] | 2102 | retval = reiserfs_inherit_default_acl(th, dir, dentry, inode); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 2103 | reiserfs_write_lock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2104 | if (retval) { |
| 2105 | err = retval; |
| 2106 | reiserfs_check_path(&path_to_key); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2107 | journal_end(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2108 | goto out_inserted_sd; |
| 2109 | } |
Linus Torvalds | 1751e8a | 2017-11-27 13:05:09 -0800 | [diff] [blame] | 2110 | } else if (inode->i_sb->s_flags & SB_POSIXACL) { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 2111 | reiserfs_warning(inode->i_sb, "jdm-13090", |
| 2112 | "ACLs aren't enabled in the fs, " |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2113 | "but vfs thinks they are!"); |
Jeff Mahoney | 6dfede69 | 2009-03-30 14:02:32 -0400 | [diff] [blame] | 2114 | } else if (IS_PRIVATE(dir)) |
| 2115 | inode->i_flags |= S_PRIVATE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2116 | |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 2117 | if (security->name) { |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 2118 | reiserfs_write_unlock(inode->i_sb); |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 2119 | retval = reiserfs_security_write(th, inode, security); |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 2120 | reiserfs_write_lock(inode->i_sb); |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 2121 | if (retval) { |
| 2122 | err = retval; |
| 2123 | reiserfs_check_path(&path_to_key); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2124 | retval = journal_end(th); |
Jeff Mahoney | 57fe60d | 2009-03-30 14:02:41 -0400 | [diff] [blame] | 2125 | if (retval) |
| 2126 | err = retval; |
| 2127 | goto out_inserted_sd; |
| 2128 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | } |
| 2130 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2131 | reiserfs_update_sd(th, inode); |
| 2132 | reiserfs_check_path(&path_to_key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2134 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2136 | out_bad_inode: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2137 | /* Invalidate the object, nothing was inserted yet */ |
| 2138 | INODE_PKEY(inode)->k_objectid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2140 | /* Quota change must be inside a transaction for journaling */ |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 2141 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
Christoph Hellwig | 63936dd | 2010-03-03 09:05:01 -0500 | [diff] [blame] | 2142 | dquot_free_inode(inode); |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 2143 | reiserfs_write_lock_nested(inode->i_sb, depth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2145 | out_end_trans: |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2146 | journal_end(th); |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2147 | /* |
| 2148 | * Drop can be outside and it needs more credits so it's better |
| 2149 | * to have it outside |
| 2150 | */ |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 2151 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
Christoph Hellwig | 9f75475 | 2010-03-03 09:05:05 -0500 | [diff] [blame] | 2152 | dquot_drop(inode); |
Jeff Mahoney | d2d0395 | 2013-08-08 17:34:47 -0400 | [diff] [blame] | 2153 | reiserfs_write_lock_nested(inode->i_sb, depth); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2154 | inode->i_flags |= S_NOQUOTA; |
| 2155 | make_bad_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2157 | out_inserted_sd: |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 2158 | clear_nlink(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2159 | th->t_trans_id = 0; /* so the caller can't use this handle later */ |
Al Viro | c1eaa26 | 2008-12-30 02:03:58 -0500 | [diff] [blame] | 2160 | unlock_new_inode(inode); /* OK to do even if we hadn't locked it */ |
Jeff Mahoney | d984561 | 2009-03-30 14:02:35 -0400 | [diff] [blame] | 2161 | iput(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2162 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | } |
| 2164 | |
| 2165 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2166 | * finds the tail page in the page cache, |
| 2167 | * reads the last block in. |
| 2168 | * |
| 2169 | * On success, page_result is set to a locked, pinned page, and bh_result |
| 2170 | * is set to an up to date buffer for the last block in the file. returns 0. |
| 2171 | * |
| 2172 | * tail conversion is not done, so bh_result might not be valid for writing |
| 2173 | * check buffer_mapped(bh_result) and bh_result->b_blocknr != 0 before |
| 2174 | * trying to write the block. |
| 2175 | * |
| 2176 | * on failure, nonzero is returned, page_result and bh_result are untouched. |
| 2177 | */ |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2178 | static int grab_tail_page(struct inode *inode, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2179 | struct page **page_result, |
| 2180 | struct buffer_head **bh_result) |
| 2181 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2183 | /* |
| 2184 | * we want the page with the last byte in the file, |
| 2185 | * not the page that will hold the next byte for appending |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2186 | */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2187 | unsigned long index = (inode->i_size - 1) >> PAGE_SHIFT; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2188 | unsigned long pos = 0; |
| 2189 | unsigned long start = 0; |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2190 | unsigned long blocksize = inode->i_sb->s_blocksize; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2191 | unsigned long offset = (inode->i_size) & (PAGE_SIZE - 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2192 | struct buffer_head *bh; |
| 2193 | struct buffer_head *head; |
| 2194 | struct page *page; |
| 2195 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2196 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2197 | /* |
| 2198 | * we know that we are only called with inode->i_size > 0. |
| 2199 | * we also know that a file tail can never be as big as a block |
| 2200 | * If i_size % blocksize == 0, our file is currently block aligned |
| 2201 | * and it won't need converting or zeroing after a truncate. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2202 | */ |
| 2203 | if ((offset & (blocksize - 1)) == 0) { |
| 2204 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | } |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2206 | page = grab_cache_page(inode->i_mapping, index); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2207 | error = -ENOMEM; |
| 2208 | if (!page) { |
| 2209 | goto out; |
| 2210 | } |
| 2211 | /* start within the page of the last block in the file */ |
| 2212 | start = (offset / blocksize) * blocksize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 2214 | error = __block_write_begin(page, start, offset - start, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2215 | reiserfs_get_block_create_0); |
| 2216 | if (error) |
| 2217 | goto unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2219 | head = page_buffers(page); |
| 2220 | bh = head; |
| 2221 | do { |
| 2222 | if (pos >= start) { |
| 2223 | break; |
| 2224 | } |
| 2225 | bh = bh->b_this_page; |
| 2226 | pos += blocksize; |
| 2227 | } while (bh != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2228 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2229 | if (!buffer_uptodate(bh)) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2230 | /* |
| 2231 | * note, this should never happen, prepare_write should be |
| 2232 | * taking care of this for us. If the buffer isn't up to |
| 2233 | * date, I've screwed up the code to find the buffer, or the |
| 2234 | * code to call prepare_write |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2235 | */ |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2236 | reiserfs_error(inode->i_sb, "clm-6000", |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 2237 | "error reading block %lu", bh->b_blocknr); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2238 | error = -EIO; |
| 2239 | goto unlock; |
| 2240 | } |
| 2241 | *bh_result = bh; |
| 2242 | *page_result = page; |
| 2243 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2244 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2245 | return error; |
| 2246 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2247 | unlock: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2248 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2249 | put_page(page); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2250 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | } |
| 2252 | |
| 2253 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2254 | * vfs version of truncate file. Must NOT be called with |
| 2255 | * a transaction already started. |
| 2256 | * |
| 2257 | * some code taken from block_truncate_page |
| 2258 | */ |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2259 | int reiserfs_truncate_file(struct inode *inode, int update_timestamps) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2260 | { |
| 2261 | struct reiserfs_transaction_handle th; |
| 2262 | /* we want the offset for the first byte after the end of the file */ |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2263 | unsigned long offset = inode->i_size & (PAGE_SIZE - 1); |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2264 | unsigned blocksize = inode->i_sb->s_blocksize; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2265 | unsigned length; |
| 2266 | struct page *page = NULL; |
| 2267 | int error; |
| 2268 | struct buffer_head *bh = NULL; |
Jeff Mahoney | 2499604 | 2005-12-14 14:38:05 -0500 | [diff] [blame] | 2269 | int err2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2271 | reiserfs_write_lock(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2272 | |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2273 | if (inode->i_size > 0) { |
| 2274 | error = grab_tail_page(inode, &page, &bh); |
| 2275 | if (error) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2276 | /* |
| 2277 | * -ENOENT means we truncated past the end of the |
| 2278 | * file, and get_block_create_0 could not find a |
| 2279 | * block to read in, which is ok. |
| 2280 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2281 | if (error != -ENOENT) |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2282 | reiserfs_error(inode->i_sb, "clm-6001", |
Jeff Mahoney | 0030b64 | 2009-03-30 14:02:28 -0400 | [diff] [blame] | 2283 | "grab_tail_page failed %d", |
| 2284 | error); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2285 | page = NULL; |
| 2286 | bh = NULL; |
| 2287 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2289 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2290 | /* |
| 2291 | * so, if page != NULL, we have a buffer head for the offset at |
| 2292 | * the end of the file. if the bh is mapped, and bh->b_blocknr != 0, |
| 2293 | * then we have an unformatted node. Otherwise, we have a direct item, |
| 2294 | * and no zeroing is required on disk. We zero after the truncate, |
| 2295 | * because the truncate might pack the item anyway |
| 2296 | * (it will unmap bh if it packs). |
| 2297 | * |
| 2298 | * it is enough to reserve space in transaction for 2 balancings: |
| 2299 | * one for "save" link adding and another for the first |
| 2300 | * cut_from_item. 1 is for update_sd |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2301 | */ |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2302 | error = journal_begin(&th, inode->i_sb, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2303 | JOURNAL_PER_BALANCE_CNT * 2 + 1); |
| 2304 | if (error) |
| 2305 | goto out; |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2306 | reiserfs_update_inode_transaction(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2307 | if (update_timestamps) |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2308 | /* |
| 2309 | * we are doing real truncate: if the system crashes |
| 2310 | * before the last transaction of truncating gets committed |
| 2311 | * - on reboot the file either appears truncated properly |
| 2312 | * or not truncated at all |
| 2313 | */ |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2314 | add_save_link(&th, inode, 1); |
| 2315 | err2 = reiserfs_do_truncate(&th, inode, page, update_timestamps); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2316 | error = journal_end(&th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2317 | if (error) |
| 2318 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2319 | |
Jeff Mahoney | 2499604 | 2005-12-14 14:38:05 -0500 | [diff] [blame] | 2320 | /* check reiserfs_do_truncate after ending the transaction */ |
| 2321 | if (err2) { |
| 2322 | error = err2; |
| 2323 | goto out; |
| 2324 | } |
| 2325 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2326 | if (update_timestamps) { |
Jeff Mahoney | 995c762 | 2009-03-30 14:02:47 -0400 | [diff] [blame] | 2327 | error = remove_save_link(inode, 1 /* truncate */); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2328 | if (error) |
| 2329 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2330 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2331 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2332 | if (page) { |
| 2333 | length = offset & (blocksize - 1); |
| 2334 | /* if we are not on a block boundary */ |
| 2335 | if (length) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2336 | length = blocksize - length; |
Christoph Lameter | eebd2aa | 2008-02-04 22:28:29 -0800 | [diff] [blame] | 2337 | zero_user(page, offset, length); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2338 | if (buffer_mapped(bh) && bh->b_blocknr != 0) { |
| 2339 | mark_buffer_dirty(bh); |
| 2340 | } |
| 2341 | } |
| 2342 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2343 | put_page(page); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2344 | } |
| 2345 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2346 | reiserfs_write_unlock(inode->i_sb); |
Frederic Weisbecker | 22c963a | 2009-04-14 05:34:24 +0200 | [diff] [blame] | 2347 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2348 | return 0; |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2349 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2350 | if (page) { |
| 2351 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2352 | put_page(page); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2353 | } |
Frederic Weisbecker | 22c963a | 2009-04-14 05:34:24 +0200 | [diff] [blame] | 2354 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2355 | reiserfs_write_unlock(inode->i_sb); |
Frederic Weisbecker | 22c963a | 2009-04-14 05:34:24 +0200 | [diff] [blame] | 2356 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2357 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | } |
| 2359 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2360 | static int map_block_for_writepage(struct inode *inode, |
| 2361 | struct buffer_head *bh_result, |
| 2362 | unsigned long block) |
| 2363 | { |
| 2364 | struct reiserfs_transaction_handle th; |
| 2365 | int fs_gen; |
| 2366 | struct item_head tmp_ih; |
| 2367 | struct item_head *ih; |
| 2368 | struct buffer_head *bh; |
| 2369 | __le32 *item; |
| 2370 | struct cpu_key key; |
| 2371 | INITIALIZE_PATH(path); |
| 2372 | int pos_in_item; |
| 2373 | int jbegin_count = JOURNAL_PER_BALANCE_CNT; |
Oleg Drokin | 7729ac5 | 2005-11-28 13:43:53 -0800 | [diff] [blame] | 2374 | loff_t byte_offset = ((loff_t)block << inode->i_sb->s_blocksize_bits)+1; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2375 | int retval; |
| 2376 | int use_get_block = 0; |
| 2377 | int bytes_copied = 0; |
| 2378 | int copy_size; |
| 2379 | int trans_running = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2380 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2381 | /* |
| 2382 | * catch places below that try to log something without |
| 2383 | * starting a trans |
| 2384 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2385 | th.t_trans_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2387 | if (!buffer_uptodate(bh_result)) { |
| 2388 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2389 | } |
| 2390 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2391 | kmap(bh_result->b_page); |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2392 | start_over: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2393 | reiserfs_write_lock(inode->i_sb); |
| 2394 | make_cpu_key(&key, inode, byte_offset, TYPE_ANY, 3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2395 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2396 | research: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2397 | retval = search_for_position_by_key(inode->i_sb, &key, &path); |
| 2398 | if (retval != POSITION_FOUND) { |
| 2399 | use_get_block = 1; |
| 2400 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2401 | } |
| 2402 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2403 | bh = get_last_bh(&path); |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 2404 | ih = tp_item_head(&path); |
| 2405 | item = tp_item_body(&path); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2406 | pos_in_item = path.pos_in_item; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2407 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2408 | /* we've found an unformatted node */ |
| 2409 | if (indirect_item_found(retval, ih)) { |
| 2410 | if (bytes_copied > 0) { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 2411 | reiserfs_warning(inode->i_sb, "clm-6002", |
| 2412 | "bytes_copied %d", bytes_copied); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2413 | } |
| 2414 | if (!get_block_num(item, pos_in_item)) { |
| 2415 | /* crap, we are writing to a hole */ |
| 2416 | use_get_block = 1; |
| 2417 | goto out; |
| 2418 | } |
| 2419 | set_block_dev_mapped(bh_result, |
| 2420 | get_block_num(item, pos_in_item), inode); |
| 2421 | } else if (is_direct_le_ih(ih)) { |
| 2422 | char *p; |
| 2423 | p = page_address(bh_result->b_page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2424 | p += (byte_offset - 1) & (PAGE_SIZE - 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2425 | copy_size = ih_item_len(ih) - pos_in_item; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2427 | fs_gen = get_generation(inode->i_sb); |
| 2428 | copy_item_head(&tmp_ih, ih); |
| 2429 | |
| 2430 | if (!trans_running) { |
| 2431 | /* vs-3050 is gone, no need to drop the path */ |
| 2432 | retval = journal_begin(&th, inode->i_sb, jbegin_count); |
| 2433 | if (retval) |
| 2434 | goto out; |
| 2435 | reiserfs_update_inode_transaction(inode); |
| 2436 | trans_running = 1; |
| 2437 | if (fs_changed(fs_gen, inode->i_sb) |
| 2438 | && item_moved(&tmp_ih, &path)) { |
| 2439 | reiserfs_restore_prepared_buffer(inode->i_sb, |
| 2440 | bh); |
| 2441 | goto research; |
| 2442 | } |
| 2443 | } |
| 2444 | |
| 2445 | reiserfs_prepare_for_journal(inode->i_sb, bh, 1); |
| 2446 | |
| 2447 | if (fs_changed(fs_gen, inode->i_sb) |
| 2448 | && item_moved(&tmp_ih, &path)) { |
| 2449 | reiserfs_restore_prepared_buffer(inode->i_sb, bh); |
| 2450 | goto research; |
| 2451 | } |
| 2452 | |
Jeff Mahoney | 4cf5f7a | 2014-04-23 10:00:35 -0400 | [diff] [blame] | 2453 | memcpy(ih_item_body(bh, ih) + pos_in_item, p + bytes_copied, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2454 | copy_size); |
| 2455 | |
Jeff Mahoney | 09f1b80 | 2014-04-23 10:00:39 -0400 | [diff] [blame] | 2456 | journal_mark_dirty(&th, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2457 | bytes_copied += copy_size; |
| 2458 | set_block_dev_mapped(bh_result, 0, inode); |
| 2459 | |
| 2460 | /* are there still bytes left? */ |
| 2461 | if (bytes_copied < bh_result->b_size && |
| 2462 | (byte_offset + bytes_copied) < inode->i_size) { |
| 2463 | set_cpu_key_k_offset(&key, |
| 2464 | cpu_key_k_offset(&key) + |
| 2465 | copy_size); |
| 2466 | goto research; |
| 2467 | } |
| 2468 | } else { |
Jeff Mahoney | 45b03d5 | 2009-03-30 14:02:21 -0400 | [diff] [blame] | 2469 | reiserfs_warning(inode->i_sb, "clm-6003", |
| 2470 | "bad item inode %lu", inode->i_ino); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2471 | retval = -EIO; |
| 2472 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2474 | retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2476 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2477 | pathrelse(&path); |
| 2478 | if (trans_running) { |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2479 | int err = journal_end(&th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2480 | if (err) |
| 2481 | retval = err; |
| 2482 | trans_running = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2483 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2484 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2486 | /* this is where we fill in holes in the file. */ |
| 2487 | if (use_get_block) { |
| 2488 | retval = reiserfs_get_block(inode, block, bh_result, |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 2489 | GET_BLOCK_CREATE | GET_BLOCK_NO_IMUX |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2490 | | GET_BLOCK_NO_DANGLE); |
| 2491 | if (!retval) { |
| 2492 | if (!buffer_mapped(bh_result) |
| 2493 | || bh_result->b_blocknr == 0) { |
| 2494 | /* get_block failed to find a mapped unformatted node. */ |
| 2495 | use_get_block = 0; |
| 2496 | goto start_over; |
| 2497 | } |
| 2498 | } |
| 2499 | } |
| 2500 | kunmap(bh_result->b_page); |
| 2501 | |
| 2502 | if (!retval && buffer_mapped(bh_result) && bh_result->b_blocknr == 0) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2503 | /* |
| 2504 | * we've copied data from the page into the direct item, so the |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2505 | * buffer in the page is now clean, mark it to reflect that. |
| 2506 | */ |
| 2507 | lock_buffer(bh_result); |
| 2508 | clear_buffer_dirty(bh_result); |
| 2509 | unlock_buffer(bh_result); |
| 2510 | } |
| 2511 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | } |
| 2513 | |
Jeff Mahoney | 0222e65 | 2009-03-30 14:02:44 -0400 | [diff] [blame] | 2514 | /* |
| 2515 | * mason@suse.com: updated in 2.5.54 to follow the same general io |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2516 | * start/recovery path as __block_write_full_page, along with special |
| 2517 | * code to handle reiserfs tails. |
| 2518 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2519 | static int reiserfs_write_full_page(struct page *page, |
| 2520 | struct writeback_control *wbc) |
| 2521 | { |
| 2522 | struct inode *inode = page->mapping->host; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2523 | unsigned long end_index = inode->i_size >> PAGE_SHIFT; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2524 | int error = 0; |
| 2525 | unsigned long block; |
Chris Mason | b4c76fa | 2006-08-05 12:15:10 -0700 | [diff] [blame] | 2526 | sector_t last_block; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2527 | struct buffer_head *head, *bh; |
| 2528 | int partial = 0; |
| 2529 | int nr = 0; |
| 2530 | int checked = PageChecked(page); |
| 2531 | struct reiserfs_transaction_handle th; |
| 2532 | struct super_block *s = inode->i_sb; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2533 | int bh_per_page = PAGE_SIZE / s->s_blocksize; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2534 | th.t_trans_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2535 | |
Chris Mason | e0e851c | 2006-02-01 03:06:49 -0800 | [diff] [blame] | 2536 | /* no logging allowed when nonblocking or from PF_MEMALLOC */ |
| 2537 | if (checked && (current->flags & PF_MEMALLOC)) { |
| 2538 | redirty_page_for_writepage(wbc, page); |
| 2539 | unlock_page(page); |
| 2540 | return 0; |
| 2541 | } |
| 2542 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2543 | /* |
| 2544 | * The page dirty bit is cleared before writepage is called, which |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2545 | * means we have to tell create_empty_buffers to make dirty buffers |
| 2546 | * The page really should be up to date at this point, so tossing |
| 2547 | * in the BH_Uptodate is just a sanity check. |
| 2548 | */ |
| 2549 | if (!page_has_buffers(page)) { |
| 2550 | create_empty_buffers(page, s->s_blocksize, |
| 2551 | (1 << BH_Dirty) | (1 << BH_Uptodate)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2552 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2553 | head = page_buffers(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2554 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2555 | /* |
| 2556 | * last page in the file, zero out any contents past the |
| 2557 | * last byte in the file |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2558 | */ |
| 2559 | if (page->index >= end_index) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2560 | unsigned last_offset; |
| 2561 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2562 | last_offset = inode->i_size & (PAGE_SIZE - 1); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2563 | /* no file contents in this page */ |
| 2564 | if (page->index >= end_index + 1 || !last_offset) { |
| 2565 | unlock_page(page); |
| 2566 | return 0; |
| 2567 | } |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2568 | zero_user_segment(page, last_offset, PAGE_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2569 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2570 | bh = head; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2571 | block = page->index << (PAGE_SHIFT - s->s_blocksize_bits); |
Chris Mason | b4c76fa | 2006-08-05 12:15:10 -0700 | [diff] [blame] | 2572 | last_block = (i_size_read(inode) - 1) >> inode->i_blkbits; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2573 | /* first map all the buffers, logging any direct items we find */ |
| 2574 | do { |
Chris Mason | b4c76fa | 2006-08-05 12:15:10 -0700 | [diff] [blame] | 2575 | if (block > last_block) { |
| 2576 | /* |
| 2577 | * This can happen when the block size is less than |
| 2578 | * the page size. The corresponding bytes in the page |
| 2579 | * were zero filled above |
| 2580 | */ |
| 2581 | clear_buffer_dirty(bh); |
| 2582 | set_buffer_uptodate(bh); |
| 2583 | } else if ((checked || buffer_dirty(bh)) && |
| 2584 | (!buffer_mapped(bh) || (buffer_mapped(bh) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2585 | && bh->b_blocknr == |
| 2586 | 0))) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2587 | /* |
| 2588 | * not mapped yet, or it points to a direct item, search |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2589 | * the btree for the mapping info, and log any direct |
| 2590 | * items found |
| 2591 | */ |
| 2592 | if ((error = map_block_for_writepage(inode, bh, block))) { |
| 2593 | goto fail; |
| 2594 | } |
| 2595 | } |
| 2596 | bh = bh->b_this_page; |
| 2597 | block++; |
| 2598 | } while (bh != head); |
| 2599 | |
| 2600 | /* |
| 2601 | * we start the transaction after map_block_for_writepage, |
| 2602 | * because it can create holes in the file (an unbounded operation). |
| 2603 | * starting it here, we can make a reliable estimate for how many |
| 2604 | * blocks we're going to log |
| 2605 | */ |
| 2606 | if (checked) { |
| 2607 | ClearPageChecked(page); |
| 2608 | reiserfs_write_lock(s); |
| 2609 | error = journal_begin(&th, s, bh_per_page + 1); |
| 2610 | if (error) { |
| 2611 | reiserfs_write_unlock(s); |
| 2612 | goto fail; |
| 2613 | } |
| 2614 | reiserfs_update_inode_transaction(inode); |
| 2615 | } |
| 2616 | /* now go through and lock any dirty buffers on the page */ |
| 2617 | do { |
| 2618 | get_bh(bh); |
| 2619 | if (!buffer_mapped(bh)) |
| 2620 | continue; |
| 2621 | if (buffer_mapped(bh) && bh->b_blocknr == 0) |
| 2622 | continue; |
| 2623 | |
| 2624 | if (checked) { |
| 2625 | reiserfs_prepare_for_journal(s, bh, 1); |
Jeff Mahoney | 09f1b80 | 2014-04-23 10:00:39 -0400 | [diff] [blame] | 2626 | journal_mark_dirty(&th, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2627 | continue; |
| 2628 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2629 | /* |
| 2630 | * from this point on, we know the buffer is mapped to a |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2631 | * real block and not a direct item |
| 2632 | */ |
Wu Fengguang | 1b430be | 2010-10-26 14:21:26 -0700 | [diff] [blame] | 2633 | if (wbc->sync_mode != WB_SYNC_NONE) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2634 | lock_buffer(bh); |
| 2635 | } else { |
Nick Piggin | ca5de40 | 2008-08-02 12:02:13 +0200 | [diff] [blame] | 2636 | if (!trylock_buffer(bh)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2637 | redirty_page_for_writepage(wbc, page); |
| 2638 | continue; |
| 2639 | } |
| 2640 | } |
| 2641 | if (test_clear_buffer_dirty(bh)) { |
| 2642 | mark_buffer_async_write(bh); |
| 2643 | } else { |
| 2644 | unlock_buffer(bh); |
| 2645 | } |
| 2646 | } while ((bh = bh->b_this_page) != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2647 | |
| 2648 | if (checked) { |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2649 | error = journal_end(&th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2650 | reiserfs_write_unlock(s); |
| 2651 | if (error) |
| 2652 | goto fail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2653 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2654 | BUG_ON(PageWriteback(page)); |
| 2655 | set_page_writeback(page); |
| 2656 | unlock_page(page); |
| 2657 | |
| 2658 | /* |
Jeff Mahoney | 0222e65 | 2009-03-30 14:02:44 -0400 | [diff] [blame] | 2659 | * since any buffer might be the only dirty buffer on the page, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2660 | * the first submit_bh can bring the page out of writeback. |
| 2661 | * be careful with the buffers. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2663 | do { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2664 | struct buffer_head *next = bh->b_this_page; |
| 2665 | if (buffer_async_write(bh)) { |
Mike Christie | 2a222ca | 2016-06-05 14:31:43 -0500 | [diff] [blame] | 2666 | submit_bh(REQ_OP_WRITE, 0, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2667 | nr++; |
| 2668 | } |
| 2669 | put_bh(bh); |
| 2670 | bh = next; |
| 2671 | } while (bh != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2672 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2673 | error = 0; |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2674 | done: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2675 | if (nr == 0) { |
| 2676 | /* |
| 2677 | * if this page only had a direct item, it is very possible for |
Jeff Mahoney | 0222e65 | 2009-03-30 14:02:44 -0400 | [diff] [blame] | 2678 | * no io to be required without there being an error. Or, |
| 2679 | * someone else could have locked them and sent them down the |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2680 | * pipe without locking the page |
| 2681 | */ |
| 2682 | bh = head; |
| 2683 | do { |
| 2684 | if (!buffer_uptodate(bh)) { |
| 2685 | partial = 1; |
| 2686 | break; |
| 2687 | } |
| 2688 | bh = bh->b_this_page; |
| 2689 | } while (bh != head); |
| 2690 | if (!partial) |
| 2691 | SetPageUptodate(page); |
| 2692 | end_page_writeback(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2693 | } |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2694 | return error; |
| 2695 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2696 | fail: |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2697 | /* |
| 2698 | * catches various errors, we need to make sure any valid dirty blocks |
Jeff Mahoney | 0222e65 | 2009-03-30 14:02:44 -0400 | [diff] [blame] | 2699 | * get to the media. The page is currently locked and not marked for |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2700 | * writeback |
| 2701 | */ |
| 2702 | ClearPageUptodate(page); |
| 2703 | bh = head; |
| 2704 | do { |
| 2705 | get_bh(bh); |
| 2706 | if (buffer_mapped(bh) && buffer_dirty(bh) && bh->b_blocknr) { |
| 2707 | lock_buffer(bh); |
| 2708 | mark_buffer_async_write(bh); |
| 2709 | } else { |
| 2710 | /* |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2711 | * clear any dirty bits that might have come from |
| 2712 | * getting attached to a dirty page |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2713 | */ |
| 2714 | clear_buffer_dirty(bh); |
| 2715 | } |
| 2716 | bh = bh->b_this_page; |
| 2717 | } while (bh != head); |
| 2718 | SetPageError(page); |
| 2719 | BUG_ON(PageWriteback(page)); |
| 2720 | set_page_writeback(page); |
| 2721 | unlock_page(page); |
| 2722 | do { |
| 2723 | struct buffer_head *next = bh->b_this_page; |
| 2724 | if (buffer_async_write(bh)) { |
| 2725 | clear_buffer_dirty(bh); |
Mike Christie | 2a222ca | 2016-06-05 14:31:43 -0500 | [diff] [blame] | 2726 | submit_bh(REQ_OP_WRITE, 0, bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2727 | nr++; |
| 2728 | } |
| 2729 | put_bh(bh); |
| 2730 | bh = next; |
| 2731 | } while (bh != head); |
| 2732 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | } |
| 2734 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2735 | static int reiserfs_readpage(struct file *f, struct page *page) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2737 | return block_read_full_page(page, reiserfs_get_block); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2738 | } |
| 2739 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2740 | static int reiserfs_writepage(struct page *page, struct writeback_control *wbc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2741 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2742 | struct inode *inode = page->mapping->host; |
| 2743 | reiserfs_wait_on_write_block(inode->i_sb); |
| 2744 | return reiserfs_write_full_page(page, wbc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2745 | } |
| 2746 | |
Jan Kara | ec8e2f7 | 2009-12-17 15:27:06 -0800 | [diff] [blame] | 2747 | static void reiserfs_truncate_failed_write(struct inode *inode) |
| 2748 | { |
| 2749 | truncate_inode_pages(inode->i_mapping, inode->i_size); |
| 2750 | reiserfs_truncate_file(inode, 0); |
| 2751 | } |
| 2752 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2753 | static int reiserfs_write_begin(struct file *file, |
| 2754 | struct address_space *mapping, |
| 2755 | loff_t pos, unsigned len, unsigned flags, |
| 2756 | struct page **pagep, void **fsdata) |
| 2757 | { |
| 2758 | struct inode *inode; |
| 2759 | struct page *page; |
| 2760 | pgoff_t index; |
| 2761 | int ret; |
| 2762 | int old_ref = 0; |
| 2763 | |
Vladimir Saveliev | f7557e8 | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2764 | inode = mapping->host; |
Fabian Frederick | 714b71a | 2015-02-17 13:45:33 -0800 | [diff] [blame] | 2765 | *fsdata = NULL; |
Vladimir Saveliev | f7557e8 | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2766 | if (flags & AOP_FLAG_CONT_EXPAND && |
| 2767 | (pos & (inode->i_sb->s_blocksize - 1)) == 0) { |
| 2768 | pos ++; |
| 2769 | *fsdata = (void *)(unsigned long)flags; |
| 2770 | } |
| 2771 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2772 | index = pos >> PAGE_SHIFT; |
Nick Piggin | 54566b2 | 2009-01-04 12:00:53 -0800 | [diff] [blame] | 2773 | page = grab_cache_page_write_begin(mapping, index, flags); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2774 | if (!page) |
| 2775 | return -ENOMEM; |
| 2776 | *pagep = page; |
| 2777 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2778 | reiserfs_wait_on_write_block(inode->i_sb); |
| 2779 | fix_tail_page_for_writing(page); |
| 2780 | if (reiserfs_transaction_running(inode->i_sb)) { |
| 2781 | struct reiserfs_transaction_handle *th; |
| 2782 | th = (struct reiserfs_transaction_handle *)current-> |
| 2783 | journal_info; |
| 2784 | BUG_ON(!th->t_refcount); |
| 2785 | BUG_ON(!th->t_trans_id); |
| 2786 | old_ref = th->t_refcount; |
| 2787 | th->t_refcount++; |
| 2788 | } |
Christoph Hellwig | 6e1db88 | 2010-06-04 11:29:57 +0200 | [diff] [blame] | 2789 | ret = __block_write_begin(page, pos, len, reiserfs_get_block); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2790 | if (ret && reiserfs_transaction_running(inode->i_sb)) { |
| 2791 | struct reiserfs_transaction_handle *th = current->journal_info; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2792 | /* |
| 2793 | * this gets a little ugly. If reiserfs_get_block returned an |
| 2794 | * error and left a transacstion running, we've got to close |
| 2795 | * it, and we've got to free handle if it was a persistent |
| 2796 | * transaction. |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2797 | * |
| 2798 | * But, if we had nested into an existing transaction, we need |
| 2799 | * to just drop the ref count on the handle. |
| 2800 | * |
| 2801 | * If old_ref == 0, the transaction is from reiserfs_get_block, |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2802 | * and it was a persistent trans. Otherwise, it was nested |
| 2803 | * above. |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2804 | */ |
| 2805 | if (th->t_refcount > old_ref) { |
| 2806 | if (old_ref) |
| 2807 | th->t_refcount--; |
| 2808 | else { |
| 2809 | int err; |
| 2810 | reiserfs_write_lock(inode->i_sb); |
| 2811 | err = reiserfs_end_persistent_transaction(th); |
| 2812 | reiserfs_write_unlock(inode->i_sb); |
| 2813 | if (err) |
| 2814 | ret = err; |
| 2815 | } |
| 2816 | } |
| 2817 | } |
| 2818 | if (ret) { |
| 2819 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2820 | put_page(page); |
Jan Kara | ec8e2f7 | 2009-12-17 15:27:06 -0800 | [diff] [blame] | 2821 | /* Truncate allocated blocks */ |
| 2822 | reiserfs_truncate_failed_write(inode); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2823 | } |
| 2824 | return ret; |
| 2825 | } |
| 2826 | |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 2827 | int __reiserfs_write_begin(struct page *page, unsigned from, unsigned len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2828 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2829 | struct inode *inode = page->mapping->host; |
| 2830 | int ret; |
| 2831 | int old_ref = 0; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2832 | int depth; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2833 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2834 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2835 | reiserfs_wait_on_write_block(inode->i_sb); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2836 | reiserfs_write_lock_nested(inode->i_sb, depth); |
Frederic Weisbecker | 8ebc423 | 2009-04-07 04:19:49 +0200 | [diff] [blame] | 2837 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2838 | fix_tail_page_for_writing(page); |
| 2839 | if (reiserfs_transaction_running(inode->i_sb)) { |
| 2840 | struct reiserfs_transaction_handle *th; |
| 2841 | th = (struct reiserfs_transaction_handle *)current-> |
| 2842 | journal_info; |
| 2843 | BUG_ON(!th->t_refcount); |
| 2844 | BUG_ON(!th->t_trans_id); |
| 2845 | old_ref = th->t_refcount; |
| 2846 | th->t_refcount++; |
| 2847 | } |
| 2848 | |
Christoph Hellwig | ebdec24 | 2010-10-06 10:47:23 +0200 | [diff] [blame] | 2849 | ret = __block_write_begin(page, from, len, reiserfs_get_block); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2850 | if (ret && reiserfs_transaction_running(inode->i_sb)) { |
| 2851 | struct reiserfs_transaction_handle *th = current->journal_info; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2852 | /* |
| 2853 | * this gets a little ugly. If reiserfs_get_block returned an |
| 2854 | * error and left a transacstion running, we've got to close |
| 2855 | * it, and we've got to free handle if it was a persistent |
| 2856 | * transaction. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2857 | * |
| 2858 | * But, if we had nested into an existing transaction, we need |
| 2859 | * to just drop the ref count on the handle. |
| 2860 | * |
| 2861 | * If old_ref == 0, the transaction is from reiserfs_get_block, |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2862 | * and it was a persistent trans. Otherwise, it was nested |
| 2863 | * above. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2864 | */ |
| 2865 | if (th->t_refcount > old_ref) { |
| 2866 | if (old_ref) |
| 2867 | th->t_refcount--; |
| 2868 | else { |
| 2869 | int err; |
| 2870 | reiserfs_write_lock(inode->i_sb); |
| 2871 | err = reiserfs_end_persistent_transaction(th); |
| 2872 | reiserfs_write_unlock(inode->i_sb); |
| 2873 | if (err) |
| 2874 | ret = err; |
| 2875 | } |
| 2876 | } |
| 2877 | } |
| 2878 | return ret; |
| 2879 | |
| 2880 | } |
| 2881 | |
| 2882 | static sector_t reiserfs_aop_bmap(struct address_space *as, sector_t block) |
| 2883 | { |
| 2884 | return generic_block_bmap(as, block, reiserfs_bmap); |
| 2885 | } |
| 2886 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2887 | static int reiserfs_write_end(struct file *file, struct address_space *mapping, |
| 2888 | loff_t pos, unsigned len, unsigned copied, |
| 2889 | struct page *page, void *fsdata) |
| 2890 | { |
| 2891 | struct inode *inode = page->mapping->host; |
| 2892 | int ret = 0; |
| 2893 | int update_sd = 0; |
| 2894 | struct reiserfs_transaction_handle *th; |
| 2895 | unsigned start; |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2896 | bool locked = false; |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2897 | |
Vladimir Saveliev | f7557e8 | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2898 | if ((unsigned long)fsdata & AOP_FLAG_CONT_EXPAND) |
| 2899 | pos ++; |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2900 | |
| 2901 | reiserfs_wait_on_write_block(inode->i_sb); |
| 2902 | if (reiserfs_transaction_running(inode->i_sb)) |
| 2903 | th = current->journal_info; |
| 2904 | else |
| 2905 | th = NULL; |
| 2906 | |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2907 | start = pos & (PAGE_SIZE - 1); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2908 | if (unlikely(copied < len)) { |
| 2909 | if (!PageUptodate(page)) |
| 2910 | copied = 0; |
| 2911 | |
| 2912 | page_zero_new_buffers(page, start + copied, start + len); |
| 2913 | } |
| 2914 | flush_dcache_page(page); |
| 2915 | |
| 2916 | reiserfs_commit_page(inode, page, start, start + copied); |
| 2917 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2918 | /* |
| 2919 | * generic_commit_write does this for us, but does not update the |
| 2920 | * transaction tracking stuff when the size changes. So, we have |
| 2921 | * to do the i_size updates here. |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2922 | */ |
Jan Kara | ec8e2f7 | 2009-12-17 15:27:06 -0800 | [diff] [blame] | 2923 | if (pos + copied > inode->i_size) { |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2924 | struct reiserfs_transaction_handle myth; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2925 | reiserfs_write_lock(inode->i_sb); |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2926 | locked = true; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2927 | /* |
| 2928 | * If the file have grown beyond the border where it |
| 2929 | * can have a tail, unmark it as needing a tail |
| 2930 | * packing |
| 2931 | */ |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2932 | if ((have_large_tails(inode->i_sb) |
| 2933 | && inode->i_size > i_block_size(inode) * 4) |
| 2934 | || (have_small_tails(inode->i_sb) |
| 2935 | && inode->i_size > i_block_size(inode))) |
| 2936 | REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask; |
| 2937 | |
| 2938 | ret = journal_begin(&myth, inode->i_sb, 1); |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2939 | if (ret) |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2940 | goto journal_error; |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2941 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2942 | reiserfs_update_inode_transaction(inode); |
Jan Kara | ec8e2f7 | 2009-12-17 15:27:06 -0800 | [diff] [blame] | 2943 | inode->i_size = pos + copied; |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2944 | /* |
| 2945 | * this will just nest into our transaction. It's important |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 2946 | * to use mark_inode_dirty so the inode gets pushed around on |
| 2947 | * the dirty lists, and so that O_SYNC works as expected |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2948 | */ |
| 2949 | mark_inode_dirty(inode); |
| 2950 | reiserfs_update_sd(&myth, inode); |
| 2951 | update_sd = 1; |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 2952 | ret = journal_end(&myth); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2953 | if (ret) |
| 2954 | goto journal_error; |
| 2955 | } |
| 2956 | if (th) { |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2957 | if (!locked) { |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2958 | reiserfs_write_lock(inode->i_sb); |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2959 | locked = true; |
| 2960 | } |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2961 | if (!update_sd) |
| 2962 | mark_inode_dirty(inode); |
| 2963 | ret = reiserfs_end_persistent_transaction(th); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2964 | if (ret) |
| 2965 | goto out; |
| 2966 | } |
| 2967 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2968 | out: |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2969 | if (locked) |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2970 | reiserfs_write_unlock(inode->i_sb); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2971 | unlock_page(page); |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2972 | put_page(page); |
Jan Kara | ec8e2f7 | 2009-12-17 15:27:06 -0800 | [diff] [blame] | 2973 | |
| 2974 | if (pos + len > inode->i_size) |
| 2975 | reiserfs_truncate_failed_write(inode); |
| 2976 | |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2977 | return ret == 0 ? copied : ret; |
| 2978 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 2979 | journal_error: |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2980 | reiserfs_write_unlock(inode->i_sb); |
Frederic Weisbecker | d6f5b0a | 2009-05-08 14:53:52 +0200 | [diff] [blame] | 2981 | locked = false; |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2982 | if (th) { |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2983 | if (!update_sd) |
| 2984 | reiserfs_update_sd(th, inode); |
| 2985 | ret = reiserfs_end_persistent_transaction(th); |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2986 | } |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 2987 | goto out; |
| 2988 | } |
| 2989 | |
| 2990 | int reiserfs_commit_write(struct file *f, struct page *page, |
| 2991 | unsigned from, unsigned to) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2992 | { |
| 2993 | struct inode *inode = page->mapping->host; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 2994 | loff_t pos = ((loff_t) page->index << PAGE_SHIFT) + to; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2995 | int ret = 0; |
| 2996 | int update_sd = 0; |
| 2997 | struct reiserfs_transaction_handle *th = NULL; |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 2998 | int depth; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 2999 | |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3000 | depth = reiserfs_write_unlock_nested(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3001 | reiserfs_wait_on_write_block(inode->i_sb); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3002 | reiserfs_write_lock_nested(inode->i_sb, depth); |
Frederic Weisbecker | 8ebc423 | 2009-04-07 04:19:49 +0200 | [diff] [blame] | 3003 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3004 | if (reiserfs_transaction_running(inode->i_sb)) { |
| 3005 | th = current->journal_info; |
| 3006 | } |
| 3007 | reiserfs_commit_page(inode, page, from, to); |
| 3008 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3009 | /* |
| 3010 | * generic_commit_write does this for us, but does not update the |
| 3011 | * transaction tracking stuff when the size changes. So, we have |
| 3012 | * to do the i_size updates here. |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3013 | */ |
| 3014 | if (pos > inode->i_size) { |
| 3015 | struct reiserfs_transaction_handle myth; |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3016 | /* |
| 3017 | * If the file have grown beyond the border where it |
| 3018 | * can have a tail, unmark it as needing a tail |
| 3019 | * packing |
| 3020 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3021 | if ((have_large_tails(inode->i_sb) |
| 3022 | && inode->i_size > i_block_size(inode) * 4) |
| 3023 | || (have_small_tails(inode->i_sb) |
| 3024 | && inode->i_size > i_block_size(inode))) |
| 3025 | REISERFS_I(inode)->i_flags &= ~i_pack_on_close_mask; |
| 3026 | |
| 3027 | ret = journal_begin(&myth, inode->i_sb, 1); |
Frederic Weisbecker | 7e94277 | 2009-08-25 03:38:12 +0200 | [diff] [blame] | 3028 | if (ret) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3029 | goto journal_error; |
Frederic Weisbecker | 7e94277 | 2009-08-25 03:38:12 +0200 | [diff] [blame] | 3030 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3031 | reiserfs_update_inode_transaction(inode); |
| 3032 | inode->i_size = pos; |
Chris Mason | 9f03783 | 2005-09-13 01:25:17 -0700 | [diff] [blame] | 3033 | /* |
| 3034 | * this will just nest into our transaction. It's important |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3035 | * to use mark_inode_dirty so the inode gets pushed around |
| 3036 | * on the dirty lists, and so that O_SYNC works as expected |
Chris Mason | 9f03783 | 2005-09-13 01:25:17 -0700 | [diff] [blame] | 3037 | */ |
| 3038 | mark_inode_dirty(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3039 | reiserfs_update_sd(&myth, inode); |
| 3040 | update_sd = 1; |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 3041 | ret = journal_end(&myth); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3042 | if (ret) |
| 3043 | goto journal_error; |
| 3044 | } |
| 3045 | if (th) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3046 | if (!update_sd) |
Chris Mason | 9f03783 | 2005-09-13 01:25:17 -0700 | [diff] [blame] | 3047 | mark_inode_dirty(inode); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3048 | ret = reiserfs_end_persistent_transaction(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3049 | if (ret) |
| 3050 | goto out; |
| 3051 | } |
| 3052 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 3053 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3054 | return ret; |
| 3055 | |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 3056 | journal_error: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3057 | if (th) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3058 | if (!update_sd) |
| 3059 | reiserfs_update_sd(th, inode); |
| 3060 | ret = reiserfs_end_persistent_transaction(th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3061 | } |
| 3062 | |
| 3063 | return ret; |
| 3064 | } |
| 3065 | |
| 3066 | void sd_attrs_to_i_attrs(__u16 sd_attrs, struct inode *inode) |
| 3067 | { |
| 3068 | if (reiserfs_attrs(inode->i_sb)) { |
| 3069 | if (sd_attrs & REISERFS_SYNC_FL) |
| 3070 | inode->i_flags |= S_SYNC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3071 | else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3072 | inode->i_flags &= ~S_SYNC; |
| 3073 | if (sd_attrs & REISERFS_IMMUTABLE_FL) |
| 3074 | inode->i_flags |= S_IMMUTABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3075 | else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3076 | inode->i_flags &= ~S_IMMUTABLE; |
| 3077 | if (sd_attrs & REISERFS_APPEND_FL) |
| 3078 | inode->i_flags |= S_APPEND; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3080 | inode->i_flags &= ~S_APPEND; |
| 3081 | if (sd_attrs & REISERFS_NOATIME_FL) |
| 3082 | inode->i_flags |= S_NOATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3083 | else |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3084 | inode->i_flags &= ~S_NOATIME; |
| 3085 | if (sd_attrs & REISERFS_NOTAIL_FL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | REISERFS_I(inode)->i_flags |= i_nopack_mask; |
| 3087 | else |
| 3088 | REISERFS_I(inode)->i_flags &= ~i_nopack_mask; |
| 3089 | } |
| 3090 | } |
| 3091 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3092 | /* |
| 3093 | * decide if this buffer needs to stay around for data logging or ordered |
| 3094 | * write purposes |
| 3095 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3096 | static int invalidatepage_can_drop(struct inode *inode, struct buffer_head *bh) |
| 3097 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3098 | int ret = 1; |
| 3099 | struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | |
Chris Mason | d62b1b8 | 2006-02-01 03:06:47 -0800 | [diff] [blame] | 3101 | lock_buffer(bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3102 | spin_lock(&j->j_dirty_buffers_lock); |
| 3103 | if (!buffer_mapped(bh)) { |
| 3104 | goto free_jh; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3105 | } |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3106 | /* |
| 3107 | * the page is locked, and the only places that log a data buffer |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3108 | * also lock the page. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3109 | */ |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3110 | if (reiserfs_file_data_log(inode)) { |
| 3111 | /* |
| 3112 | * very conservative, leave the buffer pinned if |
| 3113 | * anyone might need it. |
| 3114 | */ |
| 3115 | if (buffer_journaled(bh) || buffer_journal_dirty(bh)) { |
| 3116 | ret = 0; |
| 3117 | } |
Chris Mason | d62b1b8 | 2006-02-01 03:06:47 -0800 | [diff] [blame] | 3118 | } else if (buffer_dirty(bh)) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3119 | struct reiserfs_journal_list *jl; |
| 3120 | struct reiserfs_jh *jh = bh->b_private; |
| 3121 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3122 | /* |
| 3123 | * why is this safe? |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3124 | * reiserfs_setattr updates i_size in the on disk |
| 3125 | * stat data before allowing vmtruncate to be called. |
| 3126 | * |
| 3127 | * If buffer was put onto the ordered list for this |
| 3128 | * transaction, we know for sure either this transaction |
| 3129 | * or an older one already has updated i_size on disk, |
| 3130 | * and this ordered data won't be referenced in the file |
| 3131 | * if we crash. |
| 3132 | * |
| 3133 | * if the buffer was put onto the ordered list for an older |
| 3134 | * transaction, we need to leave it around |
| 3135 | */ |
| 3136 | if (jh && (jl = jh->jl) |
| 3137 | && jl != SB_JOURNAL(inode->i_sb)->j_current_jl) |
| 3138 | ret = 0; |
| 3139 | } |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 3140 | free_jh: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3141 | if (ret && bh->b_private) { |
| 3142 | reiserfs_free_jh(bh); |
| 3143 | } |
| 3144 | spin_unlock(&j->j_dirty_buffers_lock); |
Chris Mason | d62b1b8 | 2006-02-01 03:06:47 -0800 | [diff] [blame] | 3145 | unlock_buffer(bh); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3146 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3147 | } |
| 3148 | |
| 3149 | /* clm -- taken from fs/buffer.c:block_invalidate_page */ |
Lukas Czerner | d47992f | 2013-05-21 23:17:23 -0400 | [diff] [blame] | 3150 | static void reiserfs_invalidatepage(struct page *page, unsigned int offset, |
| 3151 | unsigned int length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3152 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3153 | struct buffer_head *head, *bh, *next; |
| 3154 | struct inode *inode = page->mapping->host; |
| 3155 | unsigned int curr_off = 0; |
Lukas Czerner | bad5483 | 2013-05-21 23:58:51 -0400 | [diff] [blame] | 3156 | unsigned int stop = offset + length; |
Kirill A. Shutemov | 09cbfea | 2016-04-01 15:29:47 +0300 | [diff] [blame] | 3157 | int partial_page = (offset || length < PAGE_SIZE); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3158 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3159 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3160 | BUG_ON(!PageLocked(page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3161 | |
Lukas Czerner | bad5483 | 2013-05-21 23:58:51 -0400 | [diff] [blame] | 3162 | if (!partial_page) |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3163 | ClearPageChecked(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3164 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3165 | if (!page_has_buffers(page)) |
| 3166 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3168 | head = page_buffers(page); |
| 3169 | bh = head; |
| 3170 | do { |
| 3171 | unsigned int next_off = curr_off + bh->b_size; |
| 3172 | next = bh->b_this_page; |
| 3173 | |
Lukas Czerner | bad5483 | 2013-05-21 23:58:51 -0400 | [diff] [blame] | 3174 | if (next_off > stop) |
| 3175 | goto out; |
| 3176 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3177 | /* |
| 3178 | * is this block fully invalidated? |
| 3179 | */ |
| 3180 | if (offset <= curr_off) { |
| 3181 | if (invalidatepage_can_drop(inode, bh)) |
| 3182 | reiserfs_unmap_buffer(bh); |
| 3183 | else |
| 3184 | ret = 0; |
| 3185 | } |
| 3186 | curr_off = next_off; |
| 3187 | bh = next; |
| 3188 | } while (bh != head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3189 | |
| 3190 | /* |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3191 | * We release buffers only if the entire page is being invalidated. |
| 3192 | * The get_block cached value has been unconditionally invalidated, |
| 3193 | * so real IO is not possible anymore. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3194 | */ |
Lukas Czerner | bad5483 | 2013-05-21 23:58:51 -0400 | [diff] [blame] | 3195 | if (!partial_page && ret) { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3196 | ret = try_to_release_page(page, 0); |
NeilBrown | 2ff28e2 | 2006-03-26 01:37:18 -0800 | [diff] [blame] | 3197 | /* maybe should BUG_ON(!ret); - neilb */ |
| 3198 | } |
Jeff Mahoney | cf776a7 | 2014-04-23 10:00:41 -0400 | [diff] [blame] | 3199 | out: |
NeilBrown | 2ff28e2 | 2006-03-26 01:37:18 -0800 | [diff] [blame] | 3200 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3201 | } |
| 3202 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3203 | static int reiserfs_set_page_dirty(struct page *page) |
| 3204 | { |
| 3205 | struct inode *inode = page->mapping->host; |
| 3206 | if (reiserfs_file_data_log(inode)) { |
| 3207 | SetPageChecked(page); |
| 3208 | return __set_page_dirty_nobuffers(page); |
| 3209 | } |
| 3210 | return __set_page_dirty_buffers(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3211 | } |
| 3212 | |
| 3213 | /* |
| 3214 | * Returns 1 if the page's buffers were dropped. The page is locked. |
| 3215 | * |
| 3216 | * Takes j_dirty_buffers_lock to protect the b_assoc_buffers list_heads |
| 3217 | * in the buffers at page_buffers(page). |
| 3218 | * |
| 3219 | * even in -o notail mode, we can't be sure an old mount without -o notail |
| 3220 | * didn't create files with tails. |
| 3221 | */ |
Al Viro | 27496a8 | 2005-10-21 03:20:48 -0400 | [diff] [blame] | 3222 | static int reiserfs_releasepage(struct page *page, gfp_t unused_gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3223 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3224 | struct inode *inode = page->mapping->host; |
| 3225 | struct reiserfs_journal *j = SB_JOURNAL(inode->i_sb); |
| 3226 | struct buffer_head *head; |
| 3227 | struct buffer_head *bh; |
| 3228 | int ret = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3229 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3230 | WARN_ON(PageChecked(page)); |
| 3231 | spin_lock(&j->j_dirty_buffers_lock); |
| 3232 | head = page_buffers(page); |
| 3233 | bh = head; |
| 3234 | do { |
| 3235 | if (bh->b_private) { |
| 3236 | if (!buffer_dirty(bh) && !buffer_locked(bh)) { |
| 3237 | reiserfs_free_jh(bh); |
| 3238 | } else { |
| 3239 | ret = 0; |
| 3240 | break; |
| 3241 | } |
| 3242 | } |
| 3243 | bh = bh->b_this_page; |
| 3244 | } while (bh != head); |
| 3245 | if (ret) |
| 3246 | ret = try_to_free_buffers(page); |
| 3247 | spin_unlock(&j->j_dirty_buffers_lock); |
| 3248 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3249 | } |
| 3250 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3251 | /* |
| 3252 | * We thank Mingming Cao for helping us understand in great detail what |
| 3253 | * to do in this section of the code. |
| 3254 | */ |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 3255 | static ssize_t reiserfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3256 | { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3257 | struct file *file = iocb->ki_filp; |
| 3258 | struct inode *inode = file->f_mapping->host; |
Al Viro | a6cbcd4 | 2014-03-04 22:38:00 -0500 | [diff] [blame] | 3259 | size_t count = iov_iter_count(iter); |
Christoph Hellwig | eafdc7d | 2010-06-04 11:29:53 +0200 | [diff] [blame] | 3260 | ssize_t ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3261 | |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 3262 | ret = blockdev_direct_IO(iocb, inode, iter, |
Al Viro | 31b1403 | 2014-03-05 01:33:16 -0500 | [diff] [blame] | 3263 | reiserfs_get_blocks_direct_io); |
Christoph Hellwig | eafdc7d | 2010-06-04 11:29:53 +0200 | [diff] [blame] | 3264 | |
| 3265 | /* |
| 3266 | * In case of error extending write may have instantiated a few |
| 3267 | * blocks outside i_size. Trim these off again. |
| 3268 | */ |
Omar Sandoval | 6f67376 | 2015-03-16 04:33:52 -0700 | [diff] [blame] | 3269 | if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) { |
Christoph Hellwig | eafdc7d | 2010-06-04 11:29:53 +0200 | [diff] [blame] | 3270 | loff_t isize = i_size_read(inode); |
Christoph Hellwig | c8b8e32 | 2016-04-07 08:51:58 -0700 | [diff] [blame] | 3271 | loff_t end = iocb->ki_pos + count; |
Christoph Hellwig | eafdc7d | 2010-06-04 11:29:53 +0200 | [diff] [blame] | 3272 | |
Marco Stornelli | cfac4b4 | 2012-12-15 11:47:31 +0100 | [diff] [blame] | 3273 | if ((end > isize) && inode_newsize_ok(inode, isize) == 0) { |
| 3274 | truncate_setsize(inode, isize); |
| 3275 | reiserfs_vfs_truncate_file(inode); |
| 3276 | } |
Christoph Hellwig | eafdc7d | 2010-06-04 11:29:53 +0200 | [diff] [blame] | 3277 | } |
| 3278 | |
| 3279 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3280 | } |
| 3281 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3282 | int reiserfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 3283 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 3284 | struct inode *inode = d_inode(dentry); |
Jeff Layton | cdd6fe6 | 2007-10-18 03:05:19 -0700 | [diff] [blame] | 3285 | unsigned int ia_valid; |
Frederic Weisbecker | 5fe1533f | 2010-01-04 22:04:01 +0100 | [diff] [blame] | 3286 | int error; |
Jeff Layton | cdd6fe6 | 2007-10-18 03:05:19 -0700 | [diff] [blame] | 3287 | |
Jan Kara | 31051c8 | 2016-05-26 16:55:18 +0200 | [diff] [blame] | 3288 | error = setattr_prepare(dentry, attr); |
Christoph Hellwig | db78b87 | 2010-06-04 11:30:03 +0200 | [diff] [blame] | 3289 | if (error) |
| 3290 | return error; |
| 3291 | |
Jeff Layton | cdd6fe6 | 2007-10-18 03:05:19 -0700 | [diff] [blame] | 3292 | /* must be turned off for recursive notify_change calls */ |
| 3293 | ia_valid = attr->ia_valid &= ~(ATTR_KILL_SUID|ATTR_KILL_SGID); |
| 3294 | |
Jan Kara | 2e6c97e | 2015-07-14 13:51:55 +0200 | [diff] [blame] | 3295 | if (is_quota_modification(inode, attr)) { |
| 3296 | error = dquot_initialize(inode); |
| 3297 | if (error) |
| 3298 | return error; |
| 3299 | } |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3300 | reiserfs_write_lock(inode->i_sb); |
Dmitry Monakhov | 1275562 | 2010-04-08 22:04:20 +0400 | [diff] [blame] | 3301 | if (attr->ia_valid & ATTR_SIZE) { |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3302 | /* |
| 3303 | * version 2 items will be caught by the s_maxbytes check |
| 3304 | * done for us in vmtruncate |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3305 | */ |
| 3306 | if (get_inode_item_key_version(inode) == KEY_FORMAT_3_5 && |
| 3307 | attr->ia_size > MAX_NON_LFS) { |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3308 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3309 | error = -EFBIG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3310 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3311 | } |
Christoph Hellwig | 562c72a | 2011-06-24 14:29:45 -0400 | [diff] [blame] | 3312 | |
| 3313 | inode_dio_wait(inode); |
| 3314 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3315 | /* fill in hole pointers in the expanding truncate case. */ |
| 3316 | if (attr->ia_size > inode->i_size) { |
Vladimir Saveliev | f7557e8 | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 3317 | error = generic_cont_expand_simple(inode, attr->ia_size); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3318 | if (REISERFS_I(inode)->i_prealloc_count > 0) { |
| 3319 | int err; |
| 3320 | struct reiserfs_transaction_handle th; |
| 3321 | /* we're changing at most 2 bitmaps, inode + super */ |
| 3322 | err = journal_begin(&th, inode->i_sb, 4); |
| 3323 | if (!err) { |
| 3324 | reiserfs_discard_prealloc(&th, inode); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 3325 | err = journal_end(&th); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3326 | } |
| 3327 | if (err) |
| 3328 | error = err; |
| 3329 | } |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 3330 | if (error) { |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3331 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3332 | goto out; |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 3333 | } |
Vladimir Saveliev | dd535a5 | 2006-07-01 04:36:32 -0700 | [diff] [blame] | 3334 | /* |
| 3335 | * file size is changed, ctime and mtime are |
| 3336 | * to be updated |
| 3337 | */ |
| 3338 | attr->ia_valid |= (ATTR_MTIME | ATTR_CTIME); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3339 | } |
| 3340 | } |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3341 | reiserfs_write_unlock(inode->i_sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3342 | |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 3343 | if ((((attr->ia_valid & ATTR_UID) && (from_kuid(&init_user_ns, attr->ia_uid) & ~0xffff)) || |
| 3344 | ((attr->ia_valid & ATTR_GID) && (from_kgid(&init_user_ns, attr->ia_gid) & ~0xffff))) && |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3345 | (get_inode_sd_version(inode) == STAT_DATA_V1)) { |
| 3346 | /* stat data of format v3.5 has 16 bit uid and gid */ |
| 3347 | error = -EINVAL; |
| 3348 | goto out; |
| 3349 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3350 | |
Eric W. Biederman | df81465 | 2012-02-07 16:30:06 -0800 | [diff] [blame] | 3351 | if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) || |
| 3352 | (ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) { |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3353 | struct reiserfs_transaction_handle th; |
| 3354 | int jbegin_count = |
| 3355 | 2 * |
| 3356 | (REISERFS_QUOTA_INIT_BLOCKS(inode->i_sb) + |
| 3357 | REISERFS_QUOTA_DEL_BLOCKS(inode->i_sb)) + |
| 3358 | 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3359 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3360 | error = reiserfs_chown_xattrs(inode, attr); |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3361 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3362 | if (error) |
| 3363 | return error; |
| 3364 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3365 | /* |
| 3366 | * (user+group)*(old+new) structure - we count quota |
| 3367 | * info and , inode write (sb, inode) |
| 3368 | */ |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3369 | reiserfs_write_lock(inode->i_sb); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3370 | error = journal_begin(&th, inode->i_sb, jbegin_count); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3371 | reiserfs_write_unlock(inode->i_sb); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3372 | if (error) |
| 3373 | goto out; |
| 3374 | error = dquot_transfer(inode, attr); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3375 | reiserfs_write_lock(inode->i_sb); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3376 | if (error) { |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 3377 | journal_end(&th); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3378 | reiserfs_write_unlock(inode->i_sb); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3379 | goto out; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3380 | } |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3381 | |
Jeff Mahoney | 098297b | 2014-04-23 10:00:36 -0400 | [diff] [blame] | 3382 | /* |
| 3383 | * Update corresponding info in inode so that everything |
| 3384 | * is in one transaction |
| 3385 | */ |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3386 | if (attr->ia_valid & ATTR_UID) |
| 3387 | inode->i_uid = attr->ia_uid; |
| 3388 | if (attr->ia_valid & ATTR_GID) |
| 3389 | inode->i_gid = attr->ia_gid; |
| 3390 | mark_inode_dirty(inode); |
Jeff Mahoney | 58d8542 | 2014-04-23 10:00:38 -0400 | [diff] [blame] | 3391 | error = journal_end(&th); |
Jeff Mahoney | 278f667 | 2013-08-08 17:34:46 -0400 | [diff] [blame] | 3392 | reiserfs_write_unlock(inode->i_sb); |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3393 | if (error) |
| 3394 | goto out; |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3395 | } |
| 3396 | |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3397 | if ((attr->ia_valid & ATTR_SIZE) && |
Marco Stornelli | cfac4b4 | 2012-12-15 11:47:31 +0100 | [diff] [blame] | 3398 | attr->ia_size != i_size_read(inode)) { |
| 3399 | error = inode_newsize_ok(inode, attr->ia_size); |
| 3400 | if (!error) { |
Jeff Mahoney | 22e7478 | 2014-05-21 13:28:07 -0400 | [diff] [blame] | 3401 | /* |
| 3402 | * Could race against reiserfs_file_release |
| 3403 | * if called from NFS, so take tailpack mutex. |
| 3404 | */ |
| 3405 | mutex_lock(&REISERFS_I(inode)->tailpack); |
Marco Stornelli | cfac4b4 | 2012-12-15 11:47:31 +0100 | [diff] [blame] | 3406 | truncate_setsize(inode, attr->ia_size); |
Jeff Mahoney | 22e7478 | 2014-05-21 13:28:07 -0400 | [diff] [blame] | 3407 | reiserfs_truncate_file(inode, 1); |
| 3408 | mutex_unlock(&REISERFS_I(inode)->tailpack); |
Marco Stornelli | cfac4b4 | 2012-12-15 11:47:31 +0100 | [diff] [blame] | 3409 | } |
| 3410 | } |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3411 | |
| 3412 | if (!error) { |
| 3413 | setattr_copy(inode, attr); |
| 3414 | mark_inode_dirty(inode); |
| 3415 | } |
Christoph Hellwig | 1025774 | 2010-06-04 11:30:02 +0200 | [diff] [blame] | 3416 | |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3417 | if (!error && reiserfs_posixacl(inode->i_sb)) { |
| 3418 | if (attr->ia_valid & ATTR_MODE) |
| 3419 | error = reiserfs_acl_chmod(inode); |
| 3420 | } |
| 3421 | |
Jeff Mahoney | 4c05141 | 2013-08-08 17:27:19 -0400 | [diff] [blame] | 3422 | out: |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3423 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3424 | } |
| 3425 | |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 3426 | const struct address_space_operations reiserfs_address_space_operations = { |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3427 | .writepage = reiserfs_writepage, |
| 3428 | .readpage = reiserfs_readpage, |
| 3429 | .readpages = reiserfs_readpages, |
| 3430 | .releasepage = reiserfs_releasepage, |
| 3431 | .invalidatepage = reiserfs_invalidatepage, |
Vladimir Saveliev | ba9d8ce | 2007-10-16 01:25:14 -0700 | [diff] [blame] | 3432 | .write_begin = reiserfs_write_begin, |
| 3433 | .write_end = reiserfs_write_end, |
Linus Torvalds | bd4c625 | 2005-07-12 20:21:28 -0700 | [diff] [blame] | 3434 | .bmap = reiserfs_aop_bmap, |
| 3435 | .direct_IO = reiserfs_direct_IO, |
| 3436 | .set_page_dirty = reiserfs_set_page_dirty, |
| 3437 | }; |