Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfs/inode.c |
| 3 | * |
| 4 | * Copyright (C) 1992 Rick Sladkey |
| 5 | * |
| 6 | * nfs inode and superblock handling functions |
| 7 | * |
Alan Cox | 526719b | 2008-10-27 15:19:48 +0000 | [diff] [blame] | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
| 10 | * |
| 11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. |
| 12 | * J.S.Peatfield@damtp.cam.ac.uk |
| 13 | * |
| 14 | */ |
| 15 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/module.h> |
| 17 | #include <linux/init.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 18 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/time.h> |
| 20 | #include <linux/kernel.h> |
| 21 | #include <linux/mm.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/stat.h> |
| 24 | #include <linux/errno.h> |
| 25 | #include <linux/unistd.h> |
| 26 | #include <linux/sunrpc/clnt.h> |
| 27 | #include <linux/sunrpc/stats.h> |
Chuck Lever | 4ece3a2 | 2006-03-20 13:44:22 -0500 | [diff] [blame] | 28 | #include <linux/sunrpc/metrics.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/nfs_fs.h> |
| 30 | #include <linux/nfs_mount.h> |
| 31 | #include <linux/nfs4_mount.h> |
| 32 | #include <linux/lockd/bind.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/seq_file.h> |
| 34 | #include <linux/mount.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/vfs.h> |
Manoj Naik | 9cdb388 | 2006-06-09 09:34:28 -0400 | [diff] [blame] | 36 | #include <linux/inet.h> |
| 37 | #include <linux/nfs_xdr.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 38 | #include <linux/slab.h> |
Frank Filz | 3fa0b4e | 2010-12-02 19:31:23 +0000 | [diff] [blame] | 39 | #include <linux/compat.h> |
Jeff Layton | d310310 | 2011-12-01 22:44:39 +0100 | [diff] [blame] | 40 | #include <linux/freezer.h> |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 41 | #include <linux/crc32.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <asm/uaccess.h> |
| 44 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 45 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 46 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 48 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 49 | #include "internal.h" |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 50 | #include "fscache.h" |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 51 | #include "dns_resolve.h" |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 52 | #include "pnfs.h" |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 53 | #include "nfs.h" |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 54 | #include "netns.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
| 59 | |
| 60 | /* Default is to see 64-bit inode numbers */ |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 62 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | static void nfs_invalidate_inode(struct inode *); |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 66 | static struct kmem_cache * nfs_inode_cachep; |
Andreas Gruenbacher | b7fa055 | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static inline unsigned long |
| 69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) |
| 70 | { |
| 71 | return nfs_fileid_to_ino_t(fattr->fileid); |
| 72 | } |
| 73 | |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 74 | /** |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 75 | * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks |
| 76 | * @word: long word containing the bit lock |
| 77 | */ |
| 78 | int nfs_wait_bit_killable(void *word) |
| 79 | { |
| 80 | if (fatal_signal_pending(current)) |
| 81 | return -ERESTARTSYS; |
Jeff Layton | d310310 | 2011-12-01 22:44:39 +0100 | [diff] [blame] | 82 | freezable_schedule(); |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 83 | return 0; |
| 84 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 85 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 86 | |
| 87 | /** |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 88 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 89 | * @fileid: 64-bit fileid |
| 90 | * |
| 91 | * This function returns a 32-bit inode number if the boot parameter |
| 92 | * nfs.enable_ino64 is zero. |
| 93 | */ |
| 94 | u64 nfs_compat_user_ino64(u64 fileid) |
| 95 | { |
Frank Filz | 3fa0b4e | 2010-12-02 19:31:23 +0000 | [diff] [blame] | 96 | #ifdef CONFIG_COMPAT |
| 97 | compat_ulong_t ino; |
| 98 | #else |
| 99 | unsigned long ino; |
| 100 | #endif |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 101 | |
| 102 | if (enable_ino64) |
| 103 | return fileid; |
| 104 | ino = fileid; |
| 105 | if (sizeof(ino) < sizeof(fileid)) |
| 106 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 107 | return ino; |
| 108 | } |
| 109 | |
Trond Myklebust | eed9935 | 2012-12-14 14:36:36 -0500 | [diff] [blame] | 110 | int nfs_drop_inode(struct inode *inode) |
| 111 | { |
| 112 | return NFS_STALE(inode) || generic_drop_inode(inode); |
| 113 | } |
| 114 | EXPORT_SYMBOL_GPL(nfs_drop_inode); |
| 115 | |
Bryan Schumaker | 19d87ca | 2012-07-30 16:05:21 -0400 | [diff] [blame] | 116 | void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 118 | /* |
| 119 | * The following should never happen... |
| 120 | */ |
Trond Myklebust | f48407d | 2012-10-15 16:19:30 -0400 | [diff] [blame] | 121 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
| 122 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 123 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 124 | nfs_access_zap_cache(inode); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 125 | nfs_fscache_release_inode_cookie(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 127 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 129 | void nfs_evict_inode(struct inode *inode) |
| 130 | { |
| 131 | truncate_inode_pages(&inode->i_data, 0); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 132 | clear_inode(inode); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 133 | nfs_clear_inode(inode); |
| 134 | } |
| 135 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 136 | /** |
| 137 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 138 | */ |
| 139 | int nfs_sync_mapping(struct address_space *mapping) |
| 140 | { |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 141 | int ret = 0; |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 142 | |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 143 | if (mapping->nrpages != 0) { |
| 144 | unmap_mapping_range(mapping, 0, 0, 0); |
| 145 | ret = nfs_wb_all(mapping->host); |
| 146 | } |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 147 | return ret; |
| 148 | } |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | /* |
| 151 | * Invalidate the local caches |
| 152 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 153 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | { |
| 155 | struct nfs_inode *nfsi = NFS_I(inode); |
| 156 | int mode = inode->i_mode; |
| 157 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 158 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 159 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 160 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 161 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | |
Trond Myklebust | c3f52af | 2012-09-03 14:56:02 -0400 | [diff] [blame] | 163 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 164 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 165 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 166 | nfs_fscache_invalidate(inode); |
| 167 | } else { |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 168 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 169 | } |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 170 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 171 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 172 | void nfs_zap_caches(struct inode *inode) |
| 173 | { |
| 174 | spin_lock(&inode->i_lock); |
| 175 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 176 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 177 | } |
| 178 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 179 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 180 | { |
| 181 | if (mapping->nrpages != 0) { |
| 182 | spin_lock(&inode->i_lock); |
| 183 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 184 | nfs_fscache_invalidate(inode); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 185 | spin_unlock(&inode->i_lock); |
| 186 | } |
| 187 | } |
| 188 | |
Trond Myklebust | f41f741 | 2008-06-11 17:39:04 -0400 | [diff] [blame] | 189 | void nfs_zap_acl_cache(struct inode *inode) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 190 | { |
| 191 | void (*clear_acl_cache)(struct inode *); |
| 192 | |
| 193 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 194 | if (clear_acl_cache != NULL) |
| 195 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 196 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 197 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 198 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 200 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 202 | void nfs_invalidate_atime(struct inode *inode) |
| 203 | { |
| 204 | spin_lock(&inode->i_lock); |
| 205 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; |
| 206 | spin_unlock(&inode->i_lock); |
| 207 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 208 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 211 | * Invalidate, but do not unhash, the inode. |
| 212 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 214 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 216 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 217 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | struct nfs_find_desc { |
| 221 | struct nfs_fh *fh; |
| 222 | struct nfs_fattr *fattr; |
| 223 | }; |
| 224 | |
| 225 | /* |
| 226 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 227 | * this, and re-exported directories (also seen in NFSv2) |
| 228 | * we are forced to allow 2 different inodes to have the same |
| 229 | * i_ino. |
| 230 | */ |
| 231 | static int |
| 232 | nfs_find_actor(struct inode *inode, void *opaque) |
| 233 | { |
| 234 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 235 | struct nfs_fh *fh = desc->fh; |
| 236 | struct nfs_fattr *fattr = desc->fattr; |
| 237 | |
| 238 | if (NFS_FILEID(inode) != fattr->fileid) |
| 239 | return 0; |
Jeff Layton | f6488c9 | 2013-02-27 20:10:34 -0500 | [diff] [blame] | 240 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
| 241 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 243 | return 0; |
| 244 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 245 | return 0; |
| 246 | return 1; |
| 247 | } |
| 248 | |
| 249 | static int |
| 250 | nfs_init_locked(struct inode *inode, void *opaque) |
| 251 | { |
| 252 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 253 | struct nfs_fattr *fattr = desc->fattr; |
| 254 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 255 | set_nfs_fileid(inode, fattr->fileid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 257 | return 0; |
| 258 | } |
| 259 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | /* |
| 261 | * This is our front-end to iget that looks up inodes by file handle |
| 262 | * instead of inode number. |
| 263 | */ |
| 264 | struct inode * |
| 265 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
| 266 | { |
| 267 | struct nfs_find_desc desc = { |
| 268 | .fh = fh, |
| 269 | .fattr = fattr |
| 270 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 271 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | unsigned long hash; |
| 273 | |
Bryan Schumaker | 7ebb931 | 2011-03-24 17:12:30 +0000 | [diff] [blame] | 274 | nfs_attr_check_mountpoint(sb, fattr); |
| 275 | |
Andy Adamson | 533eb46 | 2011-06-13 18:25:56 -0400 | [diff] [blame] | 276 | if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) && |
| 277 | !nfs_attr_use_mounted_on_fileid(fattr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 279 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
| 282 | hash = nfs_fattr_to_ino_t(fattr); |
| 283 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 284 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 285 | if (inode == NULL) { |
| 286 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 288 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
| 290 | if (inode->i_state & I_NEW) { |
| 291 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 292 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
| 294 | /* We set i_ino for the few things that still rely on it, |
| 295 | * such as stat(2) */ |
| 296 | inode->i_ino = hash; |
| 297 | |
| 298 | /* We can't support update_atime(), since the server will reset it */ |
| 299 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 300 | inode->i_mode = fattr->mode; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 301 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
| 302 | && nfs_server_capable(inode, NFS_CAP_MODE)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 303 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 305 | * that's precisely what we have in nfs_file_inode_operations. |
| 306 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 307 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | if (S_ISREG(inode->i_mode)) { |
Jeff Layton | 1788ea6 | 2011-11-04 13:31:21 -0400 | [diff] [blame] | 309 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | inode->i_data.a_ops = &nfs_file_aops; |
| 311 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; |
| 312 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 313 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | inode->i_fop = &nfs_dir_operations; |
Trond Myklebust | 11de3b1 | 2010-12-01 14:17:06 -0500 | [diff] [blame] | 315 | inode->i_data.a_ops = &nfs_dir_aops; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 316 | /* Deal with crossing mountpoints */ |
Bryan Schumaker | 7ebb931 | 2011-03-24 17:12:30 +0000 | [diff] [blame] | 317 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
| 318 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 319 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 320 | inode->i_op = &nfs_referral_inode_operations; |
| 321 | else |
| 322 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 323 | inode->i_fop = NULL; |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 324 | inode->i_flags |= S_AUTOMOUNT; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 325 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } else if (S_ISLNK(inode->i_mode)) |
| 327 | inode->i_op = &nfs_symlink_inode_operations; |
| 328 | else |
| 329 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 330 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 331 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 332 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 333 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 334 | inode->i_version = 0; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 335 | inode->i_size = 0; |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 336 | clear_nlink(inode); |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 337 | inode->i_uid = make_kuid(&init_user_ns, -2); |
| 338 | inode->i_gid = make_kgid(&init_user_ns, -2); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 339 | inode->i_blocks = 0; |
| 340 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Andy Adamson | 2701d08 | 2012-05-24 13:13:24 -0400 | [diff] [blame] | 341 | nfsi->write_io = 0; |
| 342 | nfsi->read_io = 0; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 343 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 344 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 345 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 346 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 347 | inode->i_atime = fattr->atime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 348 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
| 349 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 350 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 351 | inode->i_mtime = fattr->mtime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 352 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 353 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 354 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 355 | inode->i_ctime = fattr->ctime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 356 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 357 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 358 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 359 | inode->i_version = fattr->change_attr; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 360 | else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 361 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 362 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 363 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 364 | else |
| 365 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 366 | | NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 367 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 368 | set_nlink(inode, fattr->nlink); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 369 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
| 370 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 371 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 372 | inode->i_uid = fattr->uid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 373 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 374 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 375 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 376 | inode->i_gid = fattr->gid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 377 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
Trond Myklebust | 4124bbc | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 378 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 379 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 380 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 381 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /* |
| 383 | * report the blocks in 512byte units |
| 384 | */ |
| 385 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 388 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 389 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 391 | nfs_fscache_init_inode_cookie(inode); |
| 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | unlock_new_inode(inode); |
| 394 | } else |
| 395 | nfs_refresh_inode(inode, fattr); |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 396 | dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | inode->i_sb->s_id, |
| 398 | (long long)NFS_FILEID(inode), |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 399 | nfs_display_fhandle_hash(fh), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | atomic_read(&inode->i_count)); |
| 401 | |
| 402 | out: |
| 403 | return inode; |
| 404 | |
| 405 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 406 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | goto out; |
| 408 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 409 | EXPORT_SYMBOL_GPL(nfs_fhget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | |
Trond Myklebust | 536e43d | 2012-01-17 22:04:26 -0500 | [diff] [blame] | 411 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | |
| 413 | int |
| 414 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 415 | { |
| 416 | struct inode *inode = dentry->d_inode; |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 417 | struct nfs_fattr *fattr; |
| 418 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 420 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 421 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 422 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 423 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 424 | attr->ia_valid &= ~ATTR_MODE; |
| 425 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | if (attr->ia_valid & ATTR_SIZE) { |
| 427 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) |
| 428 | attr->ia_valid &= ~ATTR_SIZE; |
| 429 | } |
| 430 | |
| 431 | /* Optimization: if the end result is no change, don't RPC */ |
| 432 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 536e43d | 2012-01-17 22:04:26 -0500 | [diff] [blame] | 433 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return 0; |
| 435 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 436 | /* Write all dirty data */ |
Trond Myklebust | 1d59d61 | 2012-05-31 12:22:33 -0400 | [diff] [blame] | 437 | if (S_ISREG(inode->i_mode)) { |
| 438 | nfs_inode_dio_wait(inode); |
Trond Myklebust | e1552e1 | 2007-04-14 19:07:28 -0400 | [diff] [blame] | 439 | nfs_wb_all(inode); |
Trond Myklebust | 1d59d61 | 2012-05-31 12:22:33 -0400 | [diff] [blame] | 440 | } |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 441 | |
| 442 | fattr = nfs_alloc_fattr(); |
| 443 | if (fattr == NULL) |
| 444 | goto out; |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 445 | /* |
| 446 | * Return any delegations if we're going to change ACLs |
| 447 | */ |
| 448 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
Bryan Schumaker | 57ec14c | 2012-06-20 15:53:44 -0400 | [diff] [blame] | 449 | NFS_PROTO(inode)->return_delegation(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 450 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 451 | if (error == 0) |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 452 | nfs_refresh_inode(inode, fattr); |
| 453 | nfs_free_fattr(fattr); |
| 454 | out: |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 455 | return error; |
| 456 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 457 | EXPORT_SYMBOL_GPL(nfs_setattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 458 | |
| 459 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 460 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 461 | * @inode: inode of the file used |
| 462 | * @offset: file offset to start truncating |
| 463 | * |
| 464 | * This is a copy of the common vmtruncate, but with the locking |
| 465 | * corrected to take into account the fact that NFS requires |
| 466 | * inode->i_size to be updated under the inode->i_lock. |
| 467 | */ |
| 468 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 469 | { |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 470 | loff_t oldsize; |
| 471 | int err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 472 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 473 | err = inode_newsize_ok(inode, offset); |
| 474 | if (err) |
| 475 | goto out; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 476 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 477 | spin_lock(&inode->i_lock); |
| 478 | oldsize = inode->i_size; |
| 479 | i_size_write(inode, offset); |
| 480 | spin_unlock(&inode->i_lock); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 481 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 482 | truncate_pagecache(inode, oldsize, offset); |
| 483 | out: |
| 484 | return err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 485 | } |
| 486 | |
| 487 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 488 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 489 | * @inode: pointer to struct inode |
| 490 | * @attr: pointer to struct iattr |
| 491 | * |
| 492 | * Note: we do this in the *proc.c in order to ensure that |
| 493 | * it works for things like exclusive creates too. |
| 494 | */ |
| 495 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) |
| 496 | { |
| 497 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Trond Myklebust | 2f28ea6 | 2008-10-05 14:26:11 -0400 | [diff] [blame] | 498 | spin_lock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 500 | int mode = attr->ia_mode & S_IALLUGO; |
| 501 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | inode->i_mode = mode; |
| 503 | } |
| 504 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 505 | inode->i_uid = attr->ia_uid; |
| 506 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 507 | inode->i_gid = attr->ia_gid; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 508 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 509 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 510 | } |
| 511 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 512 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 513 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 514 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 516 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 519 | { |
| 520 | struct inode *inode = dentry->d_inode; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 521 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | int err; |
| 523 | |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 524 | /* Flush out writes to the server in order to update c/mtime. */ |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 525 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | 1d59d61 | 2012-05-31 12:22:33 -0400 | [diff] [blame] | 526 | nfs_inode_dio_wait(inode); |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 527 | err = filemap_write_and_wait(inode->i_mapping); |
| 528 | if (err) |
| 529 | goto out; |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 530 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 531 | |
| 532 | /* |
| 533 | * We may force a getattr if the user cares about atime. |
| 534 | * |
| 535 | * Note that we only have to check the vfsmount flags here: |
| 536 | * - NFS always sets S_NOATIME by so checking it would give a |
| 537 | * bogus result |
| 538 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 539 | * no point in checking those. |
| 540 | */ |
| 541 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 542 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 544 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | if (need_atime) |
| 546 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
| 547 | else |
| 548 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 549 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 551 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 552 | } |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 553 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | return err; |
| 555 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 556 | EXPORT_SYMBOL_GPL(nfs_getattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 558 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
| 559 | { |
| 560 | atomic_set(&l_ctx->count, 1); |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 561 | l_ctx->lockowner.l_owner = current->files; |
| 562 | l_ctx->lockowner.l_pid = current->tgid; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 563 | INIT_LIST_HEAD(&l_ctx->list); |
| 564 | } |
| 565 | |
| 566 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) |
| 567 | { |
| 568 | struct nfs_lock_context *pos; |
| 569 | |
| 570 | list_for_each_entry(pos, &ctx->lock_context.list, list) { |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 571 | if (pos->lockowner.l_owner != current->files) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 572 | continue; |
Trond Myklebust | 2a36915 | 2012-08-13 18:54:45 -0400 | [diff] [blame] | 573 | if (pos->lockowner.l_pid != current->tgid) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 574 | continue; |
| 575 | atomic_inc(&pos->count); |
| 576 | return pos; |
| 577 | } |
| 578 | return NULL; |
| 579 | } |
| 580 | |
| 581 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) |
| 582 | { |
| 583 | struct nfs_lock_context *res, *new = NULL; |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 584 | struct inode *inode = ctx->dentry->d_inode; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 585 | |
| 586 | spin_lock(&inode->i_lock); |
| 587 | res = __nfs_find_lock_context(ctx); |
| 588 | if (res == NULL) { |
| 589 | spin_unlock(&inode->i_lock); |
| 590 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 591 | if (new == NULL) |
Trond Myklebust | b3c54de | 2012-08-13 17:15:50 -0400 | [diff] [blame] | 592 | return ERR_PTR(-ENOMEM); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 593 | nfs_init_lock_context(new); |
| 594 | spin_lock(&inode->i_lock); |
| 595 | res = __nfs_find_lock_context(ctx); |
| 596 | if (res == NULL) { |
| 597 | list_add_tail(&new->list, &ctx->lock_context.list); |
| 598 | new->open_context = ctx; |
| 599 | res = new; |
| 600 | new = NULL; |
| 601 | } |
| 602 | } |
| 603 | spin_unlock(&inode->i_lock); |
| 604 | kfree(new); |
| 605 | return res; |
| 606 | } |
| 607 | |
| 608 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) |
| 609 | { |
| 610 | struct nfs_open_context *ctx = l_ctx->open_context; |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 611 | struct inode *inode = ctx->dentry->d_inode; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 612 | |
| 613 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
| 614 | return; |
| 615 | list_del(&l_ctx->list); |
| 616 | spin_unlock(&inode->i_lock); |
| 617 | kfree(l_ctx); |
| 618 | } |
| 619 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 620 | /** |
| 621 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 622 | * @ctx: pointer to context |
| 623 | * @is_sync: is this a synchronous close |
| 624 | * |
| 625 | * always ensure that the attributes are up to date if we're mounted |
| 626 | * with close-to-open semantics |
| 627 | */ |
| 628 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 629 | { |
| 630 | struct inode *inode; |
| 631 | struct nfs_server *server; |
| 632 | |
| 633 | if (!(ctx->mode & FMODE_WRITE)) |
| 634 | return; |
| 635 | if (!is_sync) |
| 636 | return; |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 637 | inode = ctx->dentry->d_inode; |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 638 | if (!list_empty(&NFS_I(inode)->open_files)) |
| 639 | return; |
| 640 | server = NFS_SERVER(inode); |
| 641 | if (server->flags & NFS_MOUNT_NOCTO) |
| 642 | return; |
| 643 | nfs_revalidate_inode(server, inode); |
| 644 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 645 | EXPORT_SYMBOL_GPL(nfs_close_context); |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 646 | |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 647 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | { |
| 649 | struct nfs_open_context *ctx; |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 650 | struct rpc_cred *cred = rpc_lookup_cred(); |
| 651 | if (IS_ERR(cred)) |
| 652 | return ERR_CAST(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 654 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 655 | if (!ctx) { |
| 656 | put_rpccred(cred); |
| 657 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 658 | } |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 659 | nfs_sb_active(dentry->d_sb); |
| 660 | ctx->dentry = dget(dentry); |
| 661 | ctx->cred = cred; |
| 662 | ctx->state = NULL; |
| 663 | ctx->mode = f_mode; |
| 664 | ctx->flags = 0; |
| 665 | ctx->error = 0; |
| 666 | nfs_init_lock_context(&ctx->lock_context); |
| 667 | ctx->lock_context.open_context = ctx; |
| 668 | INIT_LIST_HEAD(&ctx->list); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 669 | ctx->mdsthreshold = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | return ctx; |
| 671 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 672 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
| 674 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 675 | { |
| 676 | if (ctx != NULL) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 677 | atomic_inc(&ctx->lock_context.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | return ctx; |
| 679 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 680 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 682 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 683 | { |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 684 | struct inode *inode = ctx->dentry->d_inode; |
| 685 | struct super_block *sb = ctx->dentry->d_sb; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 686 | |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 687 | if (!list_empty(&ctx->list)) { |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 688 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
| 689 | return; |
| 690 | list_del(&ctx->list); |
| 691 | spin_unlock(&inode->i_lock); |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 692 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 693 | return; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 694 | if (inode != NULL) |
| 695 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 696 | if (ctx->cred != NULL) |
| 697 | put_rpccred(ctx->cred); |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 698 | dput(ctx->dentry); |
Trond Myklebust | 322b2b9 | 2013-01-11 16:39:51 -0500 | [diff] [blame] | 699 | nfs_sb_deactive(sb); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 700 | kfree(ctx->mdsthreshold); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 701 | kfree(ctx); |
| 702 | } |
| 703 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 704 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 705 | { |
| 706 | __put_nfs_open_context(ctx, 0); |
| 707 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 708 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 709 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | /* |
| 711 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 712 | * shared pages |
| 713 | */ |
Trond Myklebust | cd9a1c0 | 2010-09-17 10:56:50 -0400 | [diff] [blame] | 714 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 716 | struct inode *inode = file_inode(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 717 | struct nfs_inode *nfsi = NFS_I(inode); |
| 718 | |
| 719 | filp->private_data = get_nfs_open_context(ctx); |
| 720 | spin_lock(&inode->i_lock); |
| 721 | list_add(&ctx->list, &nfsi->open_files); |
| 722 | spin_unlock(&inode->i_lock); |
| 723 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 724 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 725 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 726 | /* |
| 727 | * Given an inode, search for an open context with the desired characteristics |
| 728 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 729 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | { |
| 731 | struct nfs_inode *nfsi = NFS_I(inode); |
| 732 | struct nfs_open_context *pos, *ctx = NULL; |
| 733 | |
| 734 | spin_lock(&inode->i_lock); |
| 735 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 736 | if (cred != NULL && pos->cred != cred) |
| 737 | continue; |
Trond Myklebust | 1544fa0 | 2010-03-25 13:54:49 -0400 | [diff] [blame] | 738 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
| 739 | continue; |
| 740 | ctx = get_nfs_open_context(pos); |
| 741 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | } |
| 743 | spin_unlock(&inode->i_lock); |
| 744 | return ctx; |
| 745 | } |
| 746 | |
Trond Myklebust | b92dccf | 2006-03-20 13:44:03 -0500 | [diff] [blame] | 747 | static void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 749 | struct inode *inode = file_inode(filp); |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 750 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
| 752 | if (ctx) { |
| 753 | filp->private_data = NULL; |
| 754 | spin_lock(&inode->i_lock); |
| 755 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 756 | spin_unlock(&inode->i_lock); |
Chuck Lever | f895c53 | 2010-02-01 14:17:50 -0500 | [diff] [blame] | 757 | __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | } |
| 759 | } |
| 760 | |
| 761 | /* |
| 762 | * These allocate and release file read/write context information. |
| 763 | */ |
| 764 | int nfs_open(struct inode *inode, struct file *filp) |
| 765 | { |
| 766 | struct nfs_open_context *ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 768 | ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode); |
| 769 | if (IS_ERR(ctx)) |
| 770 | return PTR_ERR(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | nfs_file_set_open_context(filp, ctx); |
| 772 | put_nfs_open_context(ctx); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 773 | nfs_fscache_set_inode_cookie(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | return 0; |
| 775 | } |
| 776 | |
| 777 | int nfs_release(struct inode *inode, struct file *filp) |
| 778 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 779 | nfs_file_clear_open_context(filp); |
| 780 | return 0; |
| 781 | } |
| 782 | |
| 783 | /* |
| 784 | * This function is called whenever some part of NFS notices that |
| 785 | * the cached attributes have to be refreshed. |
| 786 | */ |
| 787 | int |
| 788 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 789 | { |
| 790 | int status = -ESTALE; |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 791 | struct nfs_fattr *fattr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 792 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | |
| 794 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", |
| 795 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 796 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 797 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 798 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 799 | if (NFS_STALE(inode)) |
| 800 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 802 | status = -ENOMEM; |
| 803 | fattr = nfs_alloc_fattr(); |
| 804 | if (fattr == NULL) |
| 805 | goto out; |
| 806 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 807 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 808 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | if (status != 0) { |
| 810 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", |
| 811 | inode->i_sb->s_id, |
| 812 | (long long)NFS_FILEID(inode), status); |
| 813 | if (status == -ESTALE) { |
| 814 | nfs_zap_caches(inode); |
| 815 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 816 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | } |
| 818 | goto out; |
| 819 | } |
| 820 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 821 | status = nfs_refresh_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | if (status) { |
| 823 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
| 824 | inode->i_sb->s_id, |
| 825 | (long long)NFS_FILEID(inode), status); |
| 826 | goto out; |
| 827 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 828 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 829 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 830 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 831 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
| 833 | inode->i_sb->s_id, |
| 834 | (long long)NFS_FILEID(inode)); |
| 835 | |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 836 | out: |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 837 | nfs_free_fattr(fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | return status; |
| 839 | } |
| 840 | |
| 841 | int nfs_attribute_timeout(struct inode *inode) |
| 842 | { |
| 843 | struct nfs_inode *nfsi = NFS_I(inode); |
| 844 | |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 845 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
| 846 | } |
| 847 | |
| 848 | static int nfs_attribute_cache_expired(struct inode *inode) |
| 849 | { |
Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 850 | if (nfs_have_delegated_attributes(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | return 0; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 852 | return nfs_attribute_timeout(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | } |
| 854 | |
| 855 | /** |
| 856 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 857 | * @server - pointer to nfs_server struct |
| 858 | * @inode - pointer to inode struct |
| 859 | * |
| 860 | * Updates inode attribute information by retrieving the data from the server. |
| 861 | */ |
| 862 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 863 | { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 864 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 865 | && !nfs_attribute_cache_expired(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 867 | return __nfs_revalidate_inode(server, inode); |
| 868 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 869 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | |
Trond Myklebust | 1cda707 | 2010-02-19 17:03:30 -0800 | [diff] [blame] | 871 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 872 | { |
| 873 | struct nfs_inode *nfsi = NFS_I(inode); |
| 874 | |
| 875 | if (mapping->nrpages != 0) { |
| 876 | int ret = invalidate_inode_pages2(mapping); |
| 877 | if (ret < 0) |
| 878 | return ret; |
| 879 | } |
| 880 | spin_lock(&inode->i_lock); |
| 881 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | 2f78e43 | 2007-09-30 15:31:19 -0400 | [diff] [blame] | 882 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 883 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 884 | spin_unlock(&inode->i_lock); |
| 885 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 886 | nfs_fscache_wait_on_invalidate(inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 887 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
| 888 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); |
| 889 | return 0; |
| 890 | } |
| 891 | |
Trond Myklebust | b4b1ead | 2012-04-29 11:23:50 -0400 | [diff] [blame] | 892 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
| 893 | { |
| 894 | if (nfs_have_delegated_attributes(inode)) |
| 895 | return false; |
| 896 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) |
| 897 | || nfs_attribute_timeout(inode) |
| 898 | || NFS_STALE(inode); |
| 899 | } |
| 900 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | /** |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 902 | * nfs_revalidate_mapping - Revalidate the pagecache |
| 903 | * @inode - pointer to host inode |
| 904 | * @mapping - pointer to mapping |
| 905 | */ |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 906 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 907 | { |
| 908 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 909 | int ret = 0; |
| 910 | |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 911 | /* swapfiles are not supposed to be shared. */ |
| 912 | if (IS_SWAPFILE(inode)) |
| 913 | goto out; |
| 914 | |
Trond Myklebust | b4b1ead | 2012-04-29 11:23:50 -0400 | [diff] [blame] | 915 | if (nfs_mapping_need_revalidate_inode(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 916 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 917 | if (ret < 0) |
| 918 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 919 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 920 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 921 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 922 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 923 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 924 | } |
| 925 | |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 926 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 927 | { |
| 928 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 929 | unsigned long ret = 0; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 930 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 931 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 932 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 933 | && inode->i_version == fattr->pre_change_attr) { |
| 934 | inode->i_version = fattr->change_attr; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 935 | if (S_ISDIR(inode->i_mode)) |
| 936 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 937 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 938 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 939 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 940 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 941 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 942 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
| 943 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 944 | ret |= NFS_INO_INVALID_ATTR; |
| 945 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 946 | |
| 947 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 948 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 949 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 950 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 951 | if (S_ISDIR(inode->i_mode)) |
| 952 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
| 953 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 954 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 955 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 956 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 957 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 958 | && nfsi->npages == 0) { |
| 959 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
| 960 | ret |= NFS_INO_INVALID_ATTR; |
| 961 | } |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 962 | |
| 963 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 964 | nfs_fscache_invalidate(inode); |
| 965 | |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 966 | return ret; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 967 | } |
| 968 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 969 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 970 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | * @inode - pointer to inode |
| 972 | * @fattr - updated attributes |
| 973 | * |
| 974 | * Verifies the attribute cache. If we have just changed the attributes, |
| 975 | * so that fattr carries weak cache consistency data, then it may |
| 976 | * also update the ctime/mtime/change_attribute. |
| 977 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 978 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | { |
| 980 | struct nfs_inode *nfsi = NFS_I(inode); |
| 981 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 982 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 984 | |
Trond Myklebust | 01da47b | 2012-04-29 12:30:19 -0400 | [diff] [blame] | 985 | if (nfs_have_delegated_attributes(inode)) |
| 986 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 988 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 990 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 991 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 993 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 994 | inode->i_version != fattr->change_attr) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 995 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | /* Verify a few of the more important attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 998 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
Trond Myklebust | fee7fe1 | 2012-04-27 13:48:18 -0400 | [diff] [blame] | 999 | invalid |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 1000 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1001 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1002 | cur_size = i_size_read(inode); |
| 1003 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1004 | if (cur_size != new_isize && nfsi->npages == 0) |
| 1005 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1006 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | |
| 1008 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1009 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 1010 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1011 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1012 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1013 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1014 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | |
| 1016 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1017 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1018 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1019 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1020 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1021 | invalid |= NFS_INO_INVALID_ATIME; |
| 1022 | |
| 1023 | if (invalid != 0) |
| 1024 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1025 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1026 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | return 0; |
| 1028 | } |
| 1029 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1030 | static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1031 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1032 | if (!(fattr->valid & NFS_ATTR_FATTR_CTIME)) |
| 1033 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1034 | return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0; |
| 1035 | } |
| 1036 | |
| 1037 | static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1038 | { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1039 | if (!(fattr->valid & NFS_ATTR_FATTR_SIZE)) |
| 1040 | return 0; |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1041 | return nfs_size_to_loff_t(fattr->size) > i_size_read(inode); |
| 1042 | } |
| 1043 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1044 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1045 | |
| 1046 | static unsigned long nfs_read_attr_generation_counter(void) |
| 1047 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1048 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1049 | } |
| 1050 | |
| 1051 | unsigned long nfs_inc_attr_generation_counter(void) |
| 1052 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1053 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1054 | } |
| 1055 | |
| 1056 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 1057 | { |
| 1058 | fattr->valid = 0; |
| 1059 | fattr->time_start = jiffies; |
| 1060 | fattr->gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6926afd | 2012-01-07 13:22:46 -0500 | [diff] [blame] | 1061 | fattr->owner_name = NULL; |
| 1062 | fattr->group_name = NULL; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1063 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1064 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1065 | |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1066 | struct nfs_fattr *nfs_alloc_fattr(void) |
| 1067 | { |
| 1068 | struct nfs_fattr *fattr; |
| 1069 | |
| 1070 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); |
| 1071 | if (fattr != NULL) |
| 1072 | nfs_fattr_init(fattr); |
| 1073 | return fattr; |
| 1074 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1075 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1076 | |
| 1077 | struct nfs_fh *nfs_alloc_fhandle(void) |
| 1078 | { |
| 1079 | struct nfs_fh *fh; |
| 1080 | |
| 1081 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); |
| 1082 | if (fh != NULL) |
| 1083 | fh->size = 0; |
| 1084 | return fh; |
| 1085 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1086 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1087 | |
Trond Myklebust | e27d359 | 2012-03-18 14:07:42 -0400 | [diff] [blame] | 1088 | #ifdef NFS_DEBUG |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1089 | /* |
| 1090 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle |
| 1091 | * in the same way that wireshark does |
| 1092 | * |
| 1093 | * @fh: file handle |
| 1094 | * |
| 1095 | * For debugging only. |
| 1096 | */ |
| 1097 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) |
| 1098 | { |
| 1099 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise |
| 1100 | * not on the result */ |
| 1101 | return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size); |
| 1102 | } |
| 1103 | |
| 1104 | /* |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1105 | * _nfs_display_fhandle - display an NFS file handle on the console |
| 1106 | * |
| 1107 | * @fh: file handle to display |
| 1108 | * @caption: display caption |
| 1109 | * |
| 1110 | * For debugging only. |
| 1111 | */ |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1112 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
| 1113 | { |
| 1114 | unsigned short i; |
| 1115 | |
Trond Myklebust | fa68a1b | 2012-03-06 10:14:35 -0500 | [diff] [blame] | 1116 | if (fh == NULL || fh->size == 0) { |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1117 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
| 1118 | return; |
| 1119 | } |
| 1120 | |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1121 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
| 1122 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1123 | for (i = 0; i < fh->size; i += 16) { |
| 1124 | __be32 *pos = (__be32 *)&fh->data[i]; |
| 1125 | |
| 1126 | switch ((fh->size - i - 1) >> 2) { |
| 1127 | case 0: |
| 1128 | printk(KERN_DEFAULT " %08x\n", |
| 1129 | be32_to_cpup(pos)); |
| 1130 | break; |
| 1131 | case 1: |
| 1132 | printk(KERN_DEFAULT " %08x %08x\n", |
| 1133 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); |
| 1134 | break; |
| 1135 | case 2: |
| 1136 | printk(KERN_DEFAULT " %08x %08x %08x\n", |
| 1137 | be32_to_cpup(pos), be32_to_cpup(pos + 1), |
| 1138 | be32_to_cpup(pos + 2)); |
| 1139 | break; |
| 1140 | default: |
| 1141 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", |
| 1142 | be32_to_cpup(pos), be32_to_cpup(pos + 1), |
| 1143 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); |
| 1144 | } |
| 1145 | } |
| 1146 | } |
| 1147 | #endif |
| 1148 | |
| 1149 | /** |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1150 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 1151 | * @inode - pointer to inode |
| 1152 | * @fattr - attributes |
| 1153 | * |
| 1154 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 1155 | * attributes got scheduled after another call carrying updated ones. |
| 1156 | * |
| 1157 | * To do so, the function first assumes that a more recent ctime means |
| 1158 | * that the attributes in fattr are newer, however it also attempt to |
| 1159 | * catch the case where ctime either didn't change, or went backwards |
| 1160 | * (if someone reset the clock on the server) by looking at whether |
| 1161 | * or not this RPC call was started after the inode was last updated. |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1162 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1163 | * |
| 1164 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 1165 | * more recent than the ones cached in the inode. |
| 1166 | * |
| 1167 | */ |
| 1168 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1169 | { |
| 1170 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1171 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1172 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 03254e6 | 2008-10-09 13:27:55 -0400 | [diff] [blame] | 1173 | nfs_ctime_need_update(inode, fattr) || |
| 1174 | nfs_size_need_update(inode, fattr) || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1175 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1176 | } |
| 1177 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1178 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1179 | { |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1180 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1181 | return nfs_update_inode(inode, fattr); |
| 1182 | return nfs_check_inode_attributes(inode, fattr); |
| 1183 | } |
| 1184 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1185 | /** |
| 1186 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1187 | * @inode - pointer to inode |
| 1188 | * @fattr - updated attributes |
| 1189 | * |
| 1190 | * Check that an RPC call that returned attributes has not overlapped with |
| 1191 | * other recent updates of the inode metadata, then decide whether it is |
| 1192 | * safe to do a full update of the inode attributes, or whether just to |
| 1193 | * call nfs_check_inode_attributes. |
| 1194 | */ |
| 1195 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1196 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1197 | int status; |
| 1198 | |
| 1199 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1200 | return 0; |
| 1201 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1202 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1203 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1204 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1205 | return status; |
| 1206 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1207 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1208 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1209 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1210 | { |
| 1211 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1212 | |
| 1213 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1214 | if (S_ISDIR(inode->i_mode)) { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1215 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1216 | nfs_fscache_invalidate(inode); |
| 1217 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1218 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1219 | return 0; |
| 1220 | return nfs_refresh_inode_locked(inode, fattr); |
| 1221 | } |
| 1222 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1223 | /** |
| 1224 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1225 | * @inode - pointer to inode |
| 1226 | * @fattr - updated attributes |
| 1227 | * |
| 1228 | * After an operation that has changed the inode metadata, mark the |
| 1229 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1230 | * |
| 1231 | * NB: if the server didn't return any post op attributes, this |
| 1232 | * function will force the retrieval of attributes before the next |
| 1233 | * NFS request. Thus it should be used only for operations that |
| 1234 | * are expected to change one or more attributes, to avoid |
| 1235 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1236 | */ |
| 1237 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1238 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1239 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1240 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1241 | spin_lock(&inode->i_lock); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1242 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1243 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1244 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1245 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 1246 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1247 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1248 | /** |
| 1249 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1250 | * @inode - pointer to inode |
| 1251 | * @fattr - updated attributes |
| 1252 | * |
| 1253 | * After an operation that has changed the inode metadata, mark the |
| 1254 | * attribute cache as being invalid, then try to update it. Fake up |
| 1255 | * weak cache consistency data, if none exist. |
| 1256 | * |
| 1257 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1258 | */ |
| 1259 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1260 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1261 | int status; |
| 1262 | |
| 1263 | spin_lock(&inode->i_lock); |
| 1264 | /* Don't do a WCC update if these attributes are already stale */ |
| 1265 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1266 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1267 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1268 | | NFS_ATTR_FATTR_PRESIZE |
| 1269 | | NFS_ATTR_FATTR_PREMTIME |
| 1270 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1271 | goto out_noforce; |
| 1272 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1273 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1274 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1275 | fattr->pre_change_attr = inode->i_version; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1276 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1277 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1278 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1279 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1280 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1281 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1282 | } |
| 1283 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1284 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1285 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1286 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1287 | } |
| 1288 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1289 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1290 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1291 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1292 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1293 | out_noforce: |
| 1294 | status = nfs_post_op_update_inode_locked(inode, fattr); |
| 1295 | spin_unlock(&inode->i_lock); |
| 1296 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1297 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1298 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | /* |
| 1301 | * Many nfs protocol calls return the new file attributes after |
| 1302 | * an operation. Here we update the inode to reflect the state |
| 1303 | * of the server's inode. |
| 1304 | * |
| 1305 | * This is a bit tricky because we have to make sure all dirty pages |
| 1306 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1307 | * To make sure no other process adds more write requests while we try |
| 1308 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1309 | * |
| 1310 | * A very similar scenario holds for the dir cache. |
| 1311 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1312 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1314 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1316 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1317 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1318 | unsigned long now = jiffies; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1319 | unsigned long save_cache_validity; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 1321 | dfprintk(VFS, "NFS: %s(%s/%ld fh_crc=0x%08x ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1322 | __func__, inode->i_sb->s_id, inode->i_ino, |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 1323 | nfs_display_fhandle_hash(NFS_FH(inode)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | atomic_read(&inode->i_count), fattr->valid); |
| 1325 | |
Matthew Treinish | e73e6c9 | 2012-04-30 11:32:57 -0400 | [diff] [blame] | 1326 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) { |
| 1327 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1328 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
| 1329 | NFS_SERVER(inode)->nfs_client->cl_hostname, |
| 1330 | inode->i_sb->s_id, (long long)nfsi->fileid, |
| 1331 | (long long)fattr->fileid); |
| 1332 | goto out_err; |
| 1333 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1334 | |
| 1335 | /* |
| 1336 | * Make sure the inode's type hasn't changed. |
| 1337 | */ |
Matthew Treinish | e73e6c9 | 2012-04-30 11:32:57 -0400 | [diff] [blame] | 1338 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
| 1339 | /* |
| 1340 | * Big trouble! The inode has become a different object. |
| 1341 | */ |
| 1342 | printk(KERN_DEBUG "NFS: %s: inode %ld mode changed, %07o to %07o\n", |
| 1343 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
| 1344 | goto out_err; |
| 1345 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1347 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1348 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1349 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1350 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 1351 | !IS_AUTOMOUNT(inode)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1352 | server->fsid = fattr->fsid; |
| 1353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | /* |
| 1355 | * Update the read time so we don't revalidate too often. |
| 1356 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1357 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1358 | |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1359 | save_cache_validity = nfsi->cache_validity; |
| 1360 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1361 | | NFS_INO_INVALID_ATIME |
| 1362 | | NFS_INO_REVAL_FORCED |
| 1363 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1364 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1365 | /* Do atomic weak cache consistency updates */ |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1366 | invalid |= nfs_wcc_update_inode(inode, fattr); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1367 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1368 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1369 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1370 | if (inode->i_version != fattr->change_attr) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1371 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1372 | inode->i_sb->s_id, inode->i_ino); |
Trond Myklebust | 6a4506c | 2012-04-27 13:48:17 -0400 | [diff] [blame] | 1373 | invalid |= NFS_INO_INVALID_ATTR |
| 1374 | | NFS_INO_INVALID_DATA |
| 1375 | | NFS_INO_INVALID_ACCESS |
| 1376 | | NFS_INO_INVALID_ACL |
| 1377 | | NFS_INO_REVAL_PAGECACHE; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1378 | if (S_ISDIR(inode->i_mode)) |
| 1379 | nfs_force_lookup_revalidate(inode); |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1380 | inode->i_version = fattr->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1381 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1382 | } else if (server->caps & NFS_CAP_CHANGE_ATTR) |
| 1383 | invalid |= save_cache_validity; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1384 | |
| 1385 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | fee7fe1 | 2012-04-27 13:48:18 -0400 | [diff] [blame] | 1386 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1387 | } else if (server->caps & NFS_CAP_MTIME) |
| 1388 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1389 | | NFS_INO_REVAL_FORCED); |
| 1390 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1391 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | fee7fe1 | 2012-04-27 13:48:18 -0400 | [diff] [blame] | 1392 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1393 | } else if (server->caps & NFS_CAP_CTIME) |
| 1394 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1395 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1396 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1397 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1398 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1399 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1400 | cur_isize = i_size_read(inode); |
| 1401 | if (new_isize != cur_isize) { |
| 1402 | /* Do we perhaps have any outstanding writes, or has |
| 1403 | * the file grown beyond our last write? */ |
Peng Tao | 0f66b59 | 2010-10-16 22:07:46 -0700 | [diff] [blame] | 1404 | if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) || |
| 1405 | new_isize > cur_isize) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1406 | i_size_write(inode, new_isize); |
| 1407 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
| 1408 | } |
Harshula Jayasuriya | 60c16ea | 2011-05-23 22:52:11 +1000 | [diff] [blame] | 1409 | dprintk("NFS: isize change on server for file %s/%ld " |
| 1410 | "(%Ld to %Ld)\n", |
| 1411 | inode->i_sb->s_id, |
| 1412 | inode->i_ino, |
| 1413 | (long long)cur_isize, |
| 1414 | (long long)new_isize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1415 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1416 | } else |
| 1417 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1418 | | NFS_INO_REVAL_PAGECACHE |
| 1419 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1422 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1423 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1424 | else if (server->caps & NFS_CAP_ATIME) |
| 1425 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME |
| 1426 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1427 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1428 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1429 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
Trond Myklebust | 9b4b351 | 2010-02-03 08:27:35 -0500 | [diff] [blame] | 1430 | umode_t newmode = inode->i_mode & S_IFMT; |
| 1431 | newmode |= fattr->mode & S_IALLUGO; |
| 1432 | inode->i_mode = newmode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1433 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1434 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1435 | } else if (server->caps & NFS_CAP_MODE) |
| 1436 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1437 | | NFS_INO_INVALID_ACCESS |
| 1438 | | NFS_INO_INVALID_ACL |
| 1439 | | NFS_INO_REVAL_FORCED); |
| 1440 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1441 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1442 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1443 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1444 | inode->i_uid = fattr->uid; |
| 1445 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1446 | } else if (server->caps & NFS_CAP_OWNER) |
| 1447 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1448 | | NFS_INO_INVALID_ACCESS |
| 1449 | | NFS_INO_INVALID_ACL |
| 1450 | | NFS_INO_REVAL_FORCED); |
| 1451 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1452 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1453 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1454 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1455 | inode->i_gid = fattr->gid; |
| 1456 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1457 | } else if (server->caps & NFS_CAP_OWNER_GROUP) |
| 1458 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1459 | | NFS_INO_INVALID_ACCESS |
| 1460 | | NFS_INO_INVALID_ACL |
| 1461 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1462 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1463 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1464 | if (inode->i_nlink != fattr->nlink) { |
| 1465 | invalid |= NFS_INO_INVALID_ATTR; |
| 1466 | if (S_ISDIR(inode->i_mode)) |
| 1467 | invalid |= NFS_INO_INVALID_DATA; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1468 | set_nlink(inode, fattr->nlink); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1469 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1470 | } else if (server->caps & NFS_CAP_NLINK) |
| 1471 | invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR |
| 1472 | | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1474 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1475 | /* |
| 1476 | * report the blocks in 512byte units |
| 1477 | */ |
| 1478 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1480 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 1481 | inode->i_blocks = fattr->du.nfs2.blocks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | |
| 1483 | /* Update attrtimeo value if we're out of the unstable period */ |
| 1484 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1485 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1487 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1488 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1489 | } else { |
Peter Staubach | 64672d5 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 1490 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1491 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) |
| 1492 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1493 | nfsi->attrtimeo_timestamp = now; |
| 1494 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | } |
Trond Myklebust | f2115dc | 2007-08-15 12:49:17 -0400 | [diff] [blame] | 1496 | invalid &= ~NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | /* Don't invalidate the data if we were to blame */ |
| 1498 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1499 | || S_ISLNK(inode->i_mode))) |
| 1500 | invalid &= ~NFS_INO_INVALID_DATA; |
Bryan Schumaker | 011e2a7 | 2012-06-20 15:53:43 -0400 | [diff] [blame] | 1501 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1502 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1503 | nfsi->cache_validity |= invalid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1504 | |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1505 | if (invalid & NFS_INO_INVALID_DATA) |
| 1506 | nfs_fscache_invalidate(inode); |
| 1507 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | return 0; |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1509 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1510 | /* |
| 1511 | * No need to worry about unhashing the dentry, as the |
| 1512 | * lookup validation will know that the inode is bad. |
| 1513 | * (But we fall through to invalidate the caches.) |
| 1514 | */ |
| 1515 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1516 | return -ESTALE; |
| 1517 | } |
| 1518 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1519 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | { |
| 1521 | struct nfs_inode *nfsi; |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 1522 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1523 | if (!nfsi) |
| 1524 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1525 | nfsi->flags = 0UL; |
| 1526 | nfsi->cache_validity = 0UL; |
Trond Myklebust | 458818e | 2005-06-22 17:16:27 +0000 | [diff] [blame] | 1527 | #ifdef CONFIG_NFS_V3_ACL |
| 1528 | nfsi->acl_access = ERR_PTR(-EAGAIN); |
| 1529 | nfsi->acl_default = ERR_PTR(-EAGAIN); |
| 1530 | #endif |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1531 | #if IS_ENABLED(CONFIG_NFS_V4) |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1532 | nfsi->nfs4_acl = NULL; |
| 1533 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | return &nfsi->vfs_inode; |
| 1535 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1536 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1538 | static void nfs_i_callback(struct rcu_head *head) |
| 1539 | { |
| 1540 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1541 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1542 | } |
| 1543 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1544 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1546 | call_rcu(&inode->i_rcu, nfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1547 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1548 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1549 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1550 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1551 | { |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1552 | #if IS_ENABLED(CONFIG_NFS_V4) |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1553 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1554 | nfsi->delegation = NULL; |
| 1555 | nfsi->delegation_state = 0; |
| 1556 | init_rwsem(&nfsi->rwsem); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1557 | nfsi->layout = NULL; |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1558 | #endif |
| 1559 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1560 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1561 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | { |
| 1563 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1564 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1565 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1566 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1567 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1568 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1569 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1570 | nfsi->npages = 0; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1571 | nfsi->commit_info.ncommit = 0; |
Trond Myklebust | 1a0de48 | 2012-06-19 18:38:56 -0400 | [diff] [blame] | 1572 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
Trond Myklebust | 565277f | 2007-10-15 18:17:53 -0400 | [diff] [blame] | 1573 | atomic_set(&nfsi->silly_count, 1); |
| 1574 | INIT_HLIST_HEAD(&nfsi->silly_list); |
| 1575 | init_waitqueue_head(&nfsi->waitqueue); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1576 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1577 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1578 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1579 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1580 | { |
| 1581 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1582 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1583 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1584 | SLAB_MEM_SPREAD), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1585 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1586 | if (nfs_inode_cachep == NULL) |
| 1587 | return -ENOMEM; |
| 1588 | |
| 1589 | return 0; |
| 1590 | } |
| 1591 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 1592 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 1594 | /* |
| 1595 | * Make sure all delayed rcu free inodes are flushed before we |
| 1596 | * destroy cache. |
| 1597 | */ |
| 1598 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 1599 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | } |
| 1601 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1602 | struct workqueue_struct *nfsiod_workqueue; |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1603 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1604 | |
| 1605 | /* |
| 1606 | * start up the nfsiod workqueue |
| 1607 | */ |
| 1608 | static int nfsiod_start(void) |
| 1609 | { |
| 1610 | struct workqueue_struct *wq; |
| 1611 | dprintk("RPC: creating workqueue nfsiod\n"); |
Tejun Heo | ada609e | 2011-01-25 14:35:54 +0100 | [diff] [blame] | 1612 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1613 | if (wq == NULL) |
| 1614 | return -ENOMEM; |
| 1615 | nfsiod_workqueue = wq; |
| 1616 | return 0; |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Destroy the nfsiod workqueue |
| 1621 | */ |
| 1622 | static void nfsiod_stop(void) |
| 1623 | { |
| 1624 | struct workqueue_struct *wq; |
| 1625 | |
| 1626 | wq = nfsiod_workqueue; |
| 1627 | if (wq == NULL) |
| 1628 | return; |
| 1629 | nfsiod_workqueue = NULL; |
| 1630 | destroy_workqueue(wq); |
| 1631 | } |
| 1632 | |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1633 | int nfs_net_id; |
Stanislav Kinsbursky | 9e2e74d | 2012-01-10 17:04:24 +0400 | [diff] [blame] | 1634 | EXPORT_SYMBOL_GPL(nfs_net_id); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1635 | |
| 1636 | static int nfs_net_init(struct net *net) |
| 1637 | { |
Stanislav Kinsbursky | 6b13168 | 2012-01-23 17:26:05 +0000 | [diff] [blame] | 1638 | nfs_clients_init(net); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1639 | return nfs_dns_resolver_cache_init(net); |
| 1640 | } |
| 1641 | |
| 1642 | static void nfs_net_exit(struct net *net) |
| 1643 | { |
| 1644 | nfs_dns_resolver_cache_destroy(net); |
Stanislav Kinsbursky | 28cd1b3 | 2012-01-23 17:26:22 +0000 | [diff] [blame] | 1645 | nfs_cleanup_cb_ident_idr(net); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1646 | } |
| 1647 | |
| 1648 | static struct pernet_operations nfs_net_ops = { |
| 1649 | .init = nfs_net_init, |
| 1650 | .exit = nfs_net_exit, |
| 1651 | .id = &nfs_net_id, |
| 1652 | .size = sizeof(struct nfs_net), |
| 1653 | }; |
| 1654 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | /* |
| 1656 | * Initialize NFS |
| 1657 | */ |
| 1658 | static int __init init_nfs_fs(void) |
| 1659 | { |
| 1660 | int err; |
| 1661 | |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1662 | err = nfs_dns_resolver_init(); |
| 1663 | if (err < 0) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1664 | goto out10;; |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1665 | |
| 1666 | err = register_pernet_subsys(&nfs_net_ops); |
| 1667 | if (err < 0) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1668 | goto out9; |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1669 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1670 | err = nfs_fscache_register(); |
| 1671 | if (err < 0) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1672 | goto out8; |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1673 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1674 | err = nfsiod_start(); |
| 1675 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1676 | goto out7; |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1677 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1678 | err = nfs_fs_proc_init(); |
| 1679 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1680 | goto out6; |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1682 | err = nfs_init_nfspagecache(); |
| 1683 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1684 | goto out5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1685 | |
| 1686 | err = nfs_init_inodecache(); |
| 1687 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1688 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | |
| 1690 | err = nfs_init_readpagecache(); |
| 1691 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1692 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | |
| 1694 | err = nfs_init_writepagecache(); |
| 1695 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1696 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1697 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | err = nfs_init_directcache(); |
| 1699 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1700 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | |
| 1702 | #ifdef CONFIG_PROC_FS |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 1703 | rpc_proc_register(&init_net, &nfs_rpcstat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1705 | if ((err = register_nfs_fs()) != 0) |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1706 | goto out0; |
| 1707 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | return 0; |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1709 | out0: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1710 | #ifdef CONFIG_PROC_FS |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 1711 | rpc_proc_unregister(&init_net, "nfs"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | nfs_destroy_directcache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1714 | out1: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1715 | nfs_destroy_writepagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1716 | out2: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1717 | nfs_destroy_readpagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1718 | out3: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1719 | nfs_destroy_inodecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1720 | out4: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1721 | nfs_destroy_nfspagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1722 | out5: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1723 | nfs_fs_proc_exit(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1724 | out6: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1725 | nfsiod_stop(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1726 | out7: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1727 | nfs_fscache_unregister(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1728 | out8: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1729 | unregister_pernet_subsys(&nfs_net_ops); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1730 | out9: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 1731 | nfs_dns_resolver_destroy(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1732 | out10: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1733 | return err; |
| 1734 | } |
| 1735 | |
| 1736 | static void __exit exit_nfs_fs(void) |
| 1737 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | nfs_destroy_writepagecache(); |
| 1740 | nfs_destroy_readpagecache(); |
| 1741 | nfs_destroy_inodecache(); |
| 1742 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 1743 | nfs_fscache_unregister(); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 1744 | unregister_pernet_subsys(&nfs_net_ops); |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 1745 | nfs_dns_resolver_destroy(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1746 | #ifdef CONFIG_PROC_FS |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 1747 | rpc_proc_unregister(&init_net, "nfs"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | #endif |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1749 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 1750 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 1751 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1752 | } |
| 1753 | |
| 1754 | /* Not quite true; I just maintain it */ |
| 1755 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 1756 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 1757 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1758 | |
| 1759 | module_init(init_nfs_fs) |
| 1760 | module_exit(exit_nfs_fs) |