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> |
Ingo Molnar | 174cd4b | 2017-02-02 19:15:33 +0100 | [diff] [blame^] | 18 | #include <linux/sched/signal.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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 42 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
Trond Myklebust | 4ce7971 | 2005-06-22 17:16:21 +0000 | [diff] [blame] | 44 | #include "nfs4_fs.h" |
Trond Myklebust | a72b442 | 2006-01-03 09:55:41 +0100 | [diff] [blame] | 45 | #include "callback.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #include "delegation.h" |
Chuck Lever | d9ef5a8 | 2006-03-20 13:44:13 -0500 | [diff] [blame] | 47 | #include "iostat.h" |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 48 | #include "internal.h" |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 49 | #include "fscache.h" |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 50 | #include "pnfs.h" |
Bryan Schumaker | ab7017a | 2012-07-30 16:05:16 -0400 | [diff] [blame] | 51 | #include "nfs.h" |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 52 | #include "netns.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 54 | #include "nfstrace.h" |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Benjamin Coddington | 210c7c1 | 2016-01-06 10:40:18 -0500 | [diff] [blame] | 74 | static int nfs_wait_killable(int mode) |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 75 | { |
Colin Cross | 416ad3c | 2013-05-06 23:50:06 +0000 | [diff] [blame] | 76 | freezable_schedule_unsafe(); |
Peter Zijlstra | dfd01f0 | 2015-12-13 22:11:16 +0100 | [diff] [blame] | 77 | if (signal_pending_state(mode, current)) |
| 78 | return -ERESTARTSYS; |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 79 | return 0; |
| 80 | } |
Benjamin Coddington | 210c7c1 | 2016-01-06 10:40:18 -0500 | [diff] [blame] | 81 | |
| 82 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) |
| 83 | { |
| 84 | return nfs_wait_killable(mode); |
| 85 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 86 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 87 | |
Benjamin Coddington | 210c7c1 | 2016-01-06 10:40:18 -0500 | [diff] [blame] | 88 | int nfs_wait_atomic_killable(atomic_t *p) |
| 89 | { |
| 90 | return nfs_wait_killable(TASK_KILLABLE); |
| 91 | } |
| 92 | |
Trond Myklebust | 72cb77f | 2009-03-11 14:10:30 -0400 | [diff] [blame] | 93 | /** |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 94 | * nfs_compat_user_ino64 - returns the user-visible inode number |
| 95 | * @fileid: 64-bit fileid |
| 96 | * |
| 97 | * This function returns a 32-bit inode number if the boot parameter |
| 98 | * nfs.enable_ino64 is zero. |
| 99 | */ |
| 100 | u64 nfs_compat_user_ino64(u64 fileid) |
| 101 | { |
Frank Filz | 3fa0b4e | 2010-12-02 19:31:23 +0000 | [diff] [blame] | 102 | #ifdef CONFIG_COMPAT |
| 103 | compat_ulong_t ino; |
| 104 | #else |
| 105 | unsigned long ino; |
| 106 | #endif |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 107 | |
| 108 | if (enable_ino64) |
| 109 | return fileid; |
| 110 | ino = fileid; |
| 111 | if (sizeof(ino) < sizeof(fileid)) |
| 112 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; |
| 113 | return ino; |
| 114 | } |
| 115 | |
Trond Myklebust | eed9935 | 2012-12-14 14:36:36 -0500 | [diff] [blame] | 116 | int nfs_drop_inode(struct inode *inode) |
| 117 | { |
| 118 | return NFS_STALE(inode) || generic_drop_inode(inode); |
| 119 | } |
| 120 | EXPORT_SYMBOL_GPL(nfs_drop_inode); |
| 121 | |
Bryan Schumaker | 19d87ca | 2012-07-30 16:05:21 -0400 | [diff] [blame] | 122 | void nfs_clear_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | { |
Trond Myklebust | da6d503 | 2006-06-01 17:26:35 -0400 | [diff] [blame] | 124 | /* |
| 125 | * The following should never happen... |
| 126 | */ |
Trond Myklebust | f48407d | 2012-10-15 16:19:30 -0400 | [diff] [blame] | 127 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
| 128 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 129 | nfs_zap_acl_cache(inode); |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 130 | nfs_access_zap_cache(inode); |
David Howells | f1fe29b | 2013-09-27 11:20:03 +0100 | [diff] [blame] | 131 | nfs_fscache_clear_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 133 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 135 | void nfs_evict_inode(struct inode *inode) |
| 136 | { |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 137 | truncate_inode_pages_final(&inode->i_data); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 138 | clear_inode(inode); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 139 | nfs_clear_inode(inode); |
| 140 | } |
| 141 | |
Trond Myklebust | 9e1681c | 2015-03-25 17:23:31 -0400 | [diff] [blame] | 142 | int nfs_sync_inode(struct inode *inode) |
Trond Myklebust | 4d346bea | 2015-03-25 16:38:33 -0400 | [diff] [blame] | 143 | { |
Christoph Hellwig | 95d9f6c | 2016-03-02 17:35:55 +0100 | [diff] [blame] | 144 | inode_dio_wait(inode); |
Trond Myklebust | 4d346bea | 2015-03-25 16:38:33 -0400 | [diff] [blame] | 145 | return nfs_wb_all(inode); |
| 146 | } |
Trond Myklebust | 9e1681c | 2015-03-25 17:23:31 -0400 | [diff] [blame] | 147 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
Trond Myklebust | 4d346bea | 2015-03-25 16:38:33 -0400 | [diff] [blame] | 148 | |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 149 | /** |
| 150 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk |
| 151 | */ |
| 152 | int nfs_sync_mapping(struct address_space *mapping) |
| 153 | { |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 154 | int ret = 0; |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 155 | |
Trond Myklebust | 5cf9521 | 2010-02-19 17:03:29 -0800 | [diff] [blame] | 156 | if (mapping->nrpages != 0) { |
| 157 | unmap_mapping_range(mapping, 0, 0, 0); |
| 158 | ret = nfs_wb_all(mapping->host); |
| 159 | } |
Trond Myklebust | 29884df | 2005-12-13 16:13:54 -0500 | [diff] [blame] | 160 | return ret; |
| 161 | } |
| 162 | |
Trond Myklebust | 187e593 | 2016-12-16 18:51:15 -0500 | [diff] [blame] | 163 | static int nfs_attribute_timeout(struct inode *inode) |
| 164 | { |
| 165 | struct nfs_inode *nfsi = NFS_I(inode); |
| 166 | |
| 167 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
| 168 | } |
| 169 | |
Trond Myklebust | 61540bf | 2016-12-08 18:18:38 -0500 | [diff] [blame] | 170 | static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags) |
| 171 | { |
| 172 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); |
| 173 | |
| 174 | /* Special case for the pagecache or access cache */ |
| 175 | if (flags == NFS_INO_REVAL_PAGECACHE && |
| 176 | !(cache_validity & NFS_INO_REVAL_FORCED)) |
| 177 | return false; |
| 178 | return (cache_validity & flags) != 0; |
| 179 | } |
| 180 | |
| 181 | static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags) |
| 182 | { |
| 183 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); |
| 184 | |
| 185 | if ((cache_validity & flags) != 0) |
| 186 | return true; |
| 187 | if (nfs_attribute_timeout(inode)) |
| 188 | return true; |
| 189 | return false; |
| 190 | } |
| 191 | |
| 192 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) |
| 193 | { |
| 194 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
| 195 | return nfs_check_cache_invalid_delegated(inode, flags); |
| 196 | |
| 197 | return nfs_check_cache_invalid_not_delegated(inode, flags); |
| 198 | } |
| 199 | |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 200 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
| 201 | { |
| 202 | struct nfs_inode *nfsi = NFS_I(inode); |
| 203 | |
| 204 | if (inode->i_mapping->nrpages == 0) |
| 205 | flags &= ~NFS_INO_INVALID_DATA; |
| 206 | nfsi->cache_validity |= flags; |
| 207 | if (flags & NFS_INO_INVALID_DATA) |
| 208 | nfs_fscache_invalidate(inode); |
| 209 | } |
| 210 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | /* |
| 212 | * Invalidate the local caches |
| 213 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 214 | static void nfs_zap_caches_locked(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
| 216 | struct nfs_inode *nfsi = NFS_I(inode); |
| 217 | int mode = inode->i_mode; |
| 218 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 219 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
| 220 | |
Trond Myklebust | c7c2097 | 2007-09-28 19:22:40 -0400 | [diff] [blame] | 221 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
| 222 | nfsi->attrtimeo_timestamp = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Trond Myklebust | c3f52af | 2012-09-03 14:56:02 -0400 | [diff] [blame] | 224 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 225 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 226 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 227 | | NFS_INO_INVALID_DATA |
| 228 | | NFS_INO_INVALID_ACCESS |
| 229 | | NFS_INO_INVALID_ACL |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 230 | | NFS_INO_REVAL_PAGECACHE); |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 231 | } else |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 232 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 233 | | NFS_INO_INVALID_ACCESS |
| 234 | | NFS_INO_INVALID_ACL |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 235 | | NFS_INO_REVAL_PAGECACHE); |
Trond Myklebust | fd1defc | 2014-02-06 14:38:53 -0500 | [diff] [blame] | 236 | nfs_zap_label_cache_locked(nfsi); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 237 | } |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 238 | |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 239 | void nfs_zap_caches(struct inode *inode) |
| 240 | { |
| 241 | spin_lock(&inode->i_lock); |
| 242 | nfs_zap_caches_locked(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 243 | spin_unlock(&inode->i_lock); |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 244 | } |
| 245 | |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 246 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
| 247 | { |
| 248 | if (mapping->nrpages != 0) { |
| 249 | spin_lock(&inode->i_lock); |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 250 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 251 | spin_unlock(&inode->i_lock); |
| 252 | } |
| 253 | } |
| 254 | |
Trond Myklebust | f41f741 | 2008-06-11 17:39:04 -0400 | [diff] [blame] | 255 | void nfs_zap_acl_cache(struct inode *inode) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 256 | { |
| 257 | void (*clear_acl_cache)(struct inode *); |
| 258 | |
| 259 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; |
| 260 | if (clear_acl_cache != NULL) |
| 261 | clear_acl_cache(inode); |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 262 | spin_lock(&inode->i_lock); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 263 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 264 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 266 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 268 | void nfs_invalidate_atime(struct inode *inode) |
| 269 | { |
| 270 | spin_lock(&inode->i_lock); |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 271 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 272 | spin_unlock(&inode->i_lock); |
| 273 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 274 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
Trond Myklebust | c481299 | 2007-09-28 17:11:45 -0400 | [diff] [blame] | 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | /* |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 277 | * Invalidate, but do not unhash, the inode. |
| 278 | * NB: must be called with inode->i_lock held! |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | */ |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 280 | static void nfs_invalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | { |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 282 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 283 | nfs_zap_caches_locked(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | } |
| 285 | |
| 286 | struct nfs_find_desc { |
| 287 | struct nfs_fh *fh; |
| 288 | struct nfs_fattr *fattr; |
| 289 | }; |
| 290 | |
| 291 | /* |
| 292 | * In NFSv3 we can have 64bit inode numbers. In order to support |
| 293 | * this, and re-exported directories (also seen in NFSv2) |
| 294 | * we are forced to allow 2 different inodes to have the same |
| 295 | * i_ino. |
| 296 | */ |
| 297 | static int |
| 298 | nfs_find_actor(struct inode *inode, void *opaque) |
| 299 | { |
| 300 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 301 | struct nfs_fh *fh = desc->fh; |
| 302 | struct nfs_fattr *fattr = desc->fattr; |
| 303 | |
| 304 | if (NFS_FILEID(inode) != fattr->fileid) |
| 305 | return 0; |
Jeff Layton | f6488c9 | 2013-02-27 20:10:34 -0500 | [diff] [blame] | 306 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
| 307 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
| 309 | return 0; |
| 310 | if (is_bad_inode(inode) || NFS_STALE(inode)) |
| 311 | return 0; |
| 312 | return 1; |
| 313 | } |
| 314 | |
| 315 | static int |
| 316 | nfs_init_locked(struct inode *inode, void *opaque) |
| 317 | { |
| 318 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; |
| 319 | struct nfs_fattr *fattr = desc->fattr; |
| 320 | |
Benny Halevy | 99fadcd | 2008-01-23 08:59:08 +0200 | [diff] [blame] | 321 | set_nfs_fileid(inode, fattr->fileid); |
Trond Myklebust | 916ec34 | 2016-06-17 16:48:28 -0400 | [diff] [blame] | 322 | inode->i_mode = fattr->mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
| 324 | return 0; |
| 325 | } |
| 326 | |
Steve Dickson | e058f70 | 2013-05-22 12:50:40 -0400 | [diff] [blame] | 327 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
Trond Myklebust | fd1defc | 2014-02-06 14:38:53 -0500 | [diff] [blame] | 328 | static void nfs_clear_label_invalid(struct inode *inode) |
| 329 | { |
| 330 | spin_lock(&inode->i_lock); |
| 331 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; |
| 332 | spin_unlock(&inode->i_lock); |
| 333 | } |
| 334 | |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 335 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
| 336 | struct nfs4_label *label) |
| 337 | { |
| 338 | int error; |
| 339 | |
| 340 | if (label == NULL) |
| 341 | return; |
| 342 | |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 343 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
| 344 | error = security_inode_notifysecctx(inode, label->label, |
| 345 | label->len); |
| 346 | if (error) |
| 347 | printk(KERN_ERR "%s() %s %d " |
| 348 | "security_inode_notifysecctx() %d\n", |
| 349 | __func__, |
| 350 | (char *)label->label, |
| 351 | label->len, error); |
Trond Myklebust | fd1defc | 2014-02-06 14:38:53 -0500 | [diff] [blame] | 352 | nfs_clear_label_invalid(inode); |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 353 | } |
| 354 | } |
| 355 | |
Steve Dickson | e058f70 | 2013-05-22 12:50:40 -0400 | [diff] [blame] | 356 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
| 357 | { |
| 358 | struct nfs4_label *label = NULL; |
| 359 | int minor_version = server->nfs_client->cl_minorversion; |
| 360 | |
| 361 | if (minor_version < 2) |
| 362 | return label; |
| 363 | |
| 364 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) |
| 365 | return label; |
| 366 | |
| 367 | label = kzalloc(sizeof(struct nfs4_label), flags); |
| 368 | if (label == NULL) |
| 369 | return ERR_PTR(-ENOMEM); |
| 370 | |
| 371 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); |
| 372 | if (label->label == NULL) { |
| 373 | kfree(label); |
| 374 | return ERR_PTR(-ENOMEM); |
| 375 | } |
| 376 | label->len = NFS4_MAXLABELLEN; |
| 377 | |
| 378 | return label; |
| 379 | } |
| 380 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 381 | #else |
Trond Myklebust | 829e57d | 2013-11-18 14:33:50 -0500 | [diff] [blame] | 382 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 383 | struct nfs4_label *label) |
| 384 | { |
| 385 | } |
Steve Dickson | e058f70 | 2013-05-22 12:50:40 -0400 | [diff] [blame] | 386 | #endif |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 387 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
Steve Dickson | e058f70 | 2013-05-22 12:50:40 -0400 | [diff] [blame] | 388 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | /* |
| 390 | * This is our front-end to iget that looks up inodes by file handle |
| 391 | * instead of inode number. |
| 392 | */ |
| 393 | struct inode * |
David Quigley | 1775fd3 | 2013-05-22 12:50:42 -0400 | [diff] [blame] | 394 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
| 396 | struct nfs_find_desc desc = { |
| 397 | .fh = fh, |
| 398 | .fattr = fattr |
| 399 | }; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 400 | struct inode *inode = ERR_PTR(-ENOENT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | unsigned long hash; |
| 402 | |
Bryan Schumaker | 7ebb931 | 2011-03-24 17:12:30 +0000 | [diff] [blame] | 403 | nfs_attr_check_mountpoint(sb, fattr); |
| 404 | |
Anna Schumaker | 2ef47eb | 2014-12-09 16:19:16 -0500 | [diff] [blame] | 405 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
| 406 | fattr->fileid = fattr->mounted_on_fileid; |
| 407 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | goto out_no_inode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 409 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | goto out_no_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
| 412 | hash = nfs_fattr_to_ino_t(fattr); |
| 413 | |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 414 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
| 415 | if (inode == NULL) { |
| 416 | inode = ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | goto out_no_inode; |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 418 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
| 420 | if (inode->i_state & I_NEW) { |
| 421 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 422 | unsigned long now = jiffies; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | |
| 424 | /* We set i_ino for the few things that still rely on it, |
| 425 | * such as stat(2) */ |
| 426 | inode->i_ino = hash; |
| 427 | |
| 428 | /* We can't support update_atime(), since the server will reset it */ |
| 429 | inode->i_flags |= S_NOATIME|S_NOCMTIME; |
| 430 | inode->i_mode = fattr->mode; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 431 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
| 432 | && nfs_server_capable(inode, NFS_CAP_MODE)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 433 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | /* Why so? Because we want revalidate for devices/FIFOs, and |
| 435 | * that's precisely what we have in nfs_file_inode_operations. |
| 436 | */ |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 437 | 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] | 438 | if (S_ISREG(inode->i_mode)) { |
Jeff Layton | 1788ea6 | 2011-11-04 13:31:21 -0400 | [diff] [blame] | 439 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | inode->i_data.a_ops = &nfs_file_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | } else if (S_ISDIR(inode->i_mode)) { |
David Howells | 8fa5c00 | 2006-08-22 20:06:12 -0400 | [diff] [blame] | 442 | 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] | 443 | inode->i_fop = &nfs_dir_operations; |
Trond Myklebust | 11de3b1 | 2010-12-01 14:17:06 -0500 | [diff] [blame] | 444 | inode->i_data.a_ops = &nfs_dir_aops; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 445 | /* Deal with crossing mountpoints */ |
Bryan Schumaker | 7ebb931 | 2011-03-24 17:12:30 +0000 | [diff] [blame] | 446 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
| 447 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { |
Manoj Naik | 6b97fd3 | 2006-06-09 09:34:29 -0400 | [diff] [blame] | 448 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
| 449 | inode->i_op = &nfs_referral_inode_operations; |
| 450 | else |
| 451 | inode->i_op = &nfs_mountpoint_inode_operations; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 452 | inode->i_fop = NULL; |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 453 | inode->i_flags |= S_AUTOMOUNT; |
Trond Myklebust | 55a9759 | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 454 | } |
Al Viro | 21fc61c | 2015-11-17 01:07:57 -0500 | [diff] [blame] | 455 | } else if (S_ISLNK(inode->i_mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | inode->i_op = &nfs_symlink_inode_operations; |
Al Viro | 21fc61c | 2015-11-17 01:07:57 -0500 | [diff] [blame] | 457 | inode_nohighmem(inode); |
| 458 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
| 460 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 461 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
| 462 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); |
| 463 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 464 | inode->i_version = 0; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 465 | inode->i_size = 0; |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 466 | clear_nlink(inode); |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 467 | inode->i_uid = make_kuid(&init_user_ns, -2); |
| 468 | inode->i_gid = make_kgid(&init_user_ns, -2); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 469 | inode->i_blocks = 0; |
| 470 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Andy Adamson | 2701d08 | 2012-05-24 13:13:24 -0400 | [diff] [blame] | 471 | nfsi->write_io = 0; |
| 472 | nfsi->read_io = 0; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 473 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 474 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 475 | nfsi->attr_gencount = fattr->gencount; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 476 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 477 | inode->i_atime = fattr->atime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 478 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 479 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 480 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 481 | inode->i_mtime = fattr->mtime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 482 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 483 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 484 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
| 485 | inode->i_ctime = fattr->ctime; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 486 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 487 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 488 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 489 | inode->i_version = fattr->change_attr; |
Trond Myklebust | cd81259 | 2015-07-05 11:12:07 -0400 | [diff] [blame] | 490 | else |
Trond Myklebust | 5c675d6 | 2015-07-05 16:07:04 -0400 | [diff] [blame] | 491 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
| 492 | | NFS_INO_REVAL_PAGECACHE); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 493 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 494 | inode->i_size = nfs_size_to_loff_t(fattr->size); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 495 | else |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 496 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
| 497 | | NFS_INO_REVAL_PAGECACHE); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 498 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 499 | set_nlink(inode, fattr->nlink); |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 500 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 501 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 502 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
| 503 | inode->i_uid = fattr->uid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 504 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 505 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 506 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
| 507 | inode->i_gid = fattr->gid; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 508 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 509 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 510 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
| 511 | inode->i_blocks = fattr->du.nfs2.blocks; |
| 512 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | /* |
| 514 | * report the blocks in 512byte units |
| 515 | */ |
| 516 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | } |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 518 | |
| 519 | nfs_setsecurity(inode, fattr, label); |
| 520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | b0c4fdd | 2007-02-05 14:44:22 -0800 | [diff] [blame] | 522 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | 1c3c07e | 2006-07-25 11:28:18 -0400 | [diff] [blame] | 523 | nfsi->access_cache = RB_ROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
David Howells | f1fe29b | 2013-09-27 11:20:03 +0100 | [diff] [blame] | 525 | nfs_fscache_init_inode(inode); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 526 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | unlock_new_inode(inode); |
| 528 | } else |
| 529 | nfs_refresh_inode(inode, fattr); |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 530 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | inode->i_sb->s_id, |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 532 | (unsigned long long)NFS_FILEID(inode), |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 533 | nfs_display_fhandle_hash(fh), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | atomic_read(&inode->i_count)); |
| 535 | |
| 536 | out: |
| 537 | return inode; |
| 538 | |
| 539 | out_no_inode: |
Trond Myklebust | 03f28e3 | 2006-03-20 13:44:48 -0500 | [diff] [blame] | 540 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | goto out; |
| 542 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 543 | EXPORT_SYMBOL_GPL(nfs_fhget); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
Trond Myklebust | 536e43d | 2012-01-17 22:04:26 -0500 | [diff] [blame] | 545 | #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] | 546 | |
| 547 | int |
| 548 | nfs_setattr(struct dentry *dentry, struct iattr *attr) |
| 549 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 550 | struct inode *inode = d_inode(dentry); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 551 | struct nfs_fattr *fattr; |
Kinglong Mee | ae57ca0 | 2015-08-26 21:10:55 +0800 | [diff] [blame] | 552 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 554 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
| 555 | |
Jeff Layton | 188b95d | 2007-10-18 03:05:21 -0700 | [diff] [blame] | 556 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 557 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) |
| 558 | attr->ia_valid &= ~ATTR_MODE; |
| 559 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | if (attr->ia_valid & ATTR_SIZE) { |
Christoph Hellwig | 08a899d | 2014-09-07 08:36:40 -0700 | [diff] [blame] | 561 | BUG_ON(!S_ISREG(inode->i_mode)); |
| 562 | |
Kinglong Mee | ae57ca0 | 2015-08-26 21:10:55 +0800 | [diff] [blame] | 563 | error = inode_newsize_ok(inode, attr->ia_size); |
| 564 | if (error) |
| 565 | return error; |
| 566 | |
| 567 | if (attr->ia_size == i_size_read(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | attr->ia_valid &= ~ATTR_SIZE; |
| 569 | } |
| 570 | |
| 571 | /* Optimization: if the end result is no change, don't RPC */ |
| 572 | attr->ia_valid &= NFS_VALID_ATTRS; |
Trond Myklebust | 536e43d | 2012-01-17 22:04:26 -0500 | [diff] [blame] | 573 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | return 0; |
| 575 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 576 | trace_nfs_setattr_enter(inode); |
| 577 | |
Trond Myklebust | 755c1e2 | 2006-03-20 13:44:06 -0500 | [diff] [blame] | 578 | /* Write all dirty data */ |
Trond Myklebust | 4d346bea | 2015-03-25 16:38:33 -0400 | [diff] [blame] | 579 | if (S_ISREG(inode->i_mode)) |
| 580 | nfs_sync_inode(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 581 | |
| 582 | fattr = nfs_alloc_fattr(); |
Kinglong Mee | ae57ca0 | 2015-08-26 21:10:55 +0800 | [diff] [blame] | 583 | if (fattr == NULL) { |
| 584 | error = -ENOMEM; |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 585 | goto out; |
Kinglong Mee | ae57ca0 | 2015-08-26 21:10:55 +0800 | [diff] [blame] | 586 | } |
| 587 | |
Trond Myklebust | 642ac54 | 2005-10-18 14:20:19 -0700 | [diff] [blame] | 588 | /* |
| 589 | * Return any delegations if we're going to change ACLs |
| 590 | */ |
| 591 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) |
Bryan Schumaker | 57ec14c | 2012-06-20 15:53:44 -0400 | [diff] [blame] | 592 | NFS_PROTO(inode)->return_delegation(inode); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 593 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 594 | if (error == 0) |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 595 | error = nfs_refresh_inode(inode, fattr); |
Trond Myklebust | 987f8df | 2010-04-16 16:22:52 -0400 | [diff] [blame] | 596 | nfs_free_fattr(fattr); |
| 597 | out: |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 598 | trace_nfs_setattr_exit(inode, error); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 599 | return error; |
| 600 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 601 | EXPORT_SYMBOL_GPL(nfs_setattr); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 602 | |
| 603 | /** |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 604 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall |
| 605 | * @inode: inode of the file used |
| 606 | * @offset: file offset to start truncating |
| 607 | * |
| 608 | * This is a copy of the common vmtruncate, but with the locking |
| 609 | * corrected to take into account the fact that NFS requires |
| 610 | * inode->i_size to be updated under the inode->i_lock. |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 611 | * Note: must be called with inode->i_lock held! |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 612 | */ |
| 613 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) |
| 614 | { |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 615 | int err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 616 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 617 | err = inode_newsize_ok(inode, offset); |
| 618 | if (err) |
| 619 | goto out; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 620 | |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 621 | i_size_write(inode, offset); |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 622 | /* Optimisation */ |
| 623 | if (offset == 0) |
| 624 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 625 | |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 626 | spin_unlock(&inode->i_lock); |
Kirill A. Shutemov | 7caef26 | 2013-09-12 15:13:56 -0700 | [diff] [blame] | 627 | truncate_pagecache(inode, offset); |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 628 | spin_lock(&inode->i_lock); |
npiggin@suse.de | c08d3b0 | 2009-08-21 02:35:06 +1000 | [diff] [blame] | 629 | out: |
| 630 | return err; |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | /** |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 634 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. |
| 635 | * @inode: pointer to struct inode |
| 636 | * @attr: pointer to struct iattr |
| 637 | * |
| 638 | * Note: we do this in the *proc.c in order to ensure that |
| 639 | * it works for things like exclusive creates too. |
| 640 | */ |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 641 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
| 642 | struct nfs_fattr *fattr) |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 643 | { |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 644 | /* Barrier: bump the attribute generation count. */ |
| 645 | nfs_fattr_set_barrier(fattr); |
| 646 | |
| 647 | spin_lock(&inode->i_lock); |
| 648 | NFS_I(inode)->attr_gencount = fattr->gencount; |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 649 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 651 | int mode = attr->ia_mode & S_IALLUGO; |
| 652 | mode |= inode->i_mode & ~S_IALLUGO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | inode->i_mode = mode; |
| 654 | } |
| 655 | if ((attr->ia_valid & ATTR_UID) != 0) |
| 656 | inode->i_uid = attr->ia_uid; |
| 657 | if ((attr->ia_valid & ATTR_GID) != 0) |
| 658 | inode->i_gid = attr->ia_gid; |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 659 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
| 660 | | NFS_INO_INVALID_ACL); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 661 | } |
| 662 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 663 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 664 | nfs_vmtruncate(inode, attr->ia_size); |
Trond Myklebust | 65e4308 | 2005-08-16 11:49:44 -0400 | [diff] [blame] | 665 | } |
Jeff Layton | 616c319 | 2015-11-25 13:50:45 -0500 | [diff] [blame] | 666 | if (fattr->valid) |
| 667 | nfs_update_inode(inode, fattr); |
| 668 | else |
| 669 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | f044636 | 2015-02-26 16:09:04 -0500 | [diff] [blame] | 670 | spin_unlock(&inode->i_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 672 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | |
Trond Myklebust | 1bcf4c5 | 2016-12-02 09:15:37 -0500 | [diff] [blame] | 674 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 675 | { |
| 676 | struct dentry *parent; |
| 677 | |
Trond Myklebust | 1bcf4c5 | 2016-12-02 09:15:37 -0500 | [diff] [blame] | 678 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
| 679 | return; |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 680 | parent = dget_parent(dentry); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 681 | nfs_force_use_readdirplus(d_inode(parent)); |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 682 | dput(parent); |
| 683 | } |
| 684 | |
Trond Myklebust | 1bcf4c5 | 2016-12-02 09:15:37 -0500 | [diff] [blame] | 685 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
| 686 | { |
| 687 | struct dentry *parent; |
| 688 | |
| 689 | if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS)) |
| 690 | return; |
| 691 | parent = dget_parent(dentry); |
| 692 | nfs_advise_use_readdirplus(d_inode(parent)); |
| 693 | dput(parent); |
| 694 | } |
| 695 | |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 696 | static bool nfs_need_revalidate_inode(struct inode *inode) |
| 697 | { |
| 698 | if (NFS_I(inode)->cache_validity & |
| 699 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) |
| 700 | return true; |
| 701 | if (nfs_attribute_cache_expired(inode)) |
| 702 | return true; |
| 703 | return false; |
| 704 | } |
| 705 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
| 707 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 708 | struct inode *inode = d_inode(dentry); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 709 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
Jan Kara | 16caf5b | 2014-10-23 14:02:47 +0200 | [diff] [blame] | 710 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 712 | trace_nfs_getattr_enter(inode); |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 713 | /* Flush out writes to the server in order to update c/mtime. */ |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 714 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | 79566ef | 2016-06-25 17:45:40 -0400 | [diff] [blame] | 715 | err = filemap_write_and_wait(inode->i_mapping); |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 716 | if (err) |
| 717 | goto out; |
Chuck Lever | 28c494c | 2007-10-26 13:32:13 -0400 | [diff] [blame] | 718 | } |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 719 | |
| 720 | /* |
| 721 | * We may force a getattr if the user cares about atime. |
| 722 | * |
| 723 | * Note that we only have to check the vfsmount flags here: |
| 724 | * - NFS always sets S_NOATIME by so checking it would give a |
| 725 | * bogus result |
| 726 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is |
| 727 | * no point in checking those. |
| 728 | */ |
| 729 | if ((mnt->mnt_flags & MNT_NOATIME) || |
| 730 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 731 | need_atime = 0; |
Christoph Hellwig | fc33a7b | 2006-01-09 20:52:17 -0800 | [diff] [blame] | 732 | |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 733 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
| 734 | struct nfs_server *server = NFS_SERVER(inode); |
| 735 | |
Trond Myklebust | 1bcf4c5 | 2016-12-02 09:15:37 -0500 | [diff] [blame] | 736 | nfs_readdirplus_parent_cache_miss(dentry); |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 737 | err = __nfs_revalidate_inode(server, inode); |
Trond Myklebust | 1bcf4c5 | 2016-12-02 09:15:37 -0500 | [diff] [blame] | 738 | } else |
| 739 | nfs_readdirplus_parent_cache_hit(dentry); |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 740 | if (!err) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | generic_fillattr(inode, stat); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 742 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
NeilBrown | 7ef5ca4 | 2015-05-08 13:10:40 +1000 | [diff] [blame] | 743 | if (S_ISDIR(inode->i_mode)) |
| 744 | stat->blksize = NFS_SERVER(inode)->dtsize; |
Peter Staubach | 4e769b9 | 2007-08-03 15:07:10 -0400 | [diff] [blame] | 745 | } |
Trond Myklebust | acdc53b | 2010-02-19 17:03:26 -0800 | [diff] [blame] | 746 | out: |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 747 | trace_nfs_getattr_exit(inode, err); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 748 | return err; |
| 749 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 750 | EXPORT_SYMBOL_GPL(nfs_getattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 752 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
| 753 | { |
| 754 | atomic_set(&l_ctx->count, 1); |
NeilBrown | d51fdb8 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 755 | l_ctx->lockowner = current->files; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 756 | INIT_LIST_HEAD(&l_ctx->list); |
Benjamin Coddington | 210c7c1 | 2016-01-06 10:40:18 -0500 | [diff] [blame] | 757 | atomic_set(&l_ctx->io_count, 0); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) |
| 761 | { |
Trond Myklebust | 8c86899 | 2013-03-15 18:11:31 -0400 | [diff] [blame] | 762 | struct nfs_lock_context *head = &ctx->lock_context; |
| 763 | struct nfs_lock_context *pos = head; |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 764 | |
Trond Myklebust | 8c86899 | 2013-03-15 18:11:31 -0400 | [diff] [blame] | 765 | do { |
NeilBrown | d51fdb8 | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 766 | if (pos->lockowner != current->files) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 767 | continue; |
| 768 | atomic_inc(&pos->count); |
| 769 | return pos; |
Trond Myklebust | 8c86899 | 2013-03-15 18:11:31 -0400 | [diff] [blame] | 770 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 771 | return NULL; |
| 772 | } |
| 773 | |
| 774 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) |
| 775 | { |
| 776 | struct nfs_lock_context *res, *new = NULL; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 777 | struct inode *inode = d_inode(ctx->dentry); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 778 | |
| 779 | spin_lock(&inode->i_lock); |
| 780 | res = __nfs_find_lock_context(ctx); |
| 781 | if (res == NULL) { |
| 782 | spin_unlock(&inode->i_lock); |
| 783 | new = kmalloc(sizeof(*new), GFP_KERNEL); |
| 784 | if (new == NULL) |
Trond Myklebust | b3c54de | 2012-08-13 17:15:50 -0400 | [diff] [blame] | 785 | return ERR_PTR(-ENOMEM); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 786 | nfs_init_lock_context(new); |
| 787 | spin_lock(&inode->i_lock); |
| 788 | res = __nfs_find_lock_context(ctx); |
| 789 | if (res == NULL) { |
| 790 | list_add_tail(&new->list, &ctx->lock_context.list); |
| 791 | new->open_context = ctx; |
| 792 | res = new; |
| 793 | new = NULL; |
| 794 | } |
| 795 | } |
| 796 | spin_unlock(&inode->i_lock); |
| 797 | kfree(new); |
| 798 | return res; |
| 799 | } |
Anna Schumaker | 1c6dcbe | 2014-09-26 13:58:48 -0400 | [diff] [blame] | 800 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 801 | |
| 802 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) |
| 803 | { |
| 804 | struct nfs_open_context *ctx = l_ctx->open_context; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 805 | struct inode *inode = d_inode(ctx->dentry); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 806 | |
| 807 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
| 808 | return; |
| 809 | list_del(&l_ctx->list); |
| 810 | spin_unlock(&inode->i_lock); |
| 811 | kfree(l_ctx); |
| 812 | } |
Anna Schumaker | 1c6dcbe | 2014-09-26 13:58:48 -0400 | [diff] [blame] | 813 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 814 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 815 | /** |
| 816 | * nfs_close_context - Common close_context() routine NFSv2/v3 |
| 817 | * @ctx: pointer to context |
| 818 | * @is_sync: is this a synchronous close |
| 819 | * |
Trond Myklebust | 5cf9d70 | 2015-09-04 15:07:37 -0400 | [diff] [blame] | 820 | * Ensure that the attributes are up to date if we're mounted |
| 821 | * with close-to-open semantics and we have cached data that will |
| 822 | * need to be revalidated on open. |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 823 | */ |
| 824 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) |
| 825 | { |
Trond Myklebust | 5cf9d70 | 2015-09-04 15:07:37 -0400 | [diff] [blame] | 826 | struct nfs_inode *nfsi; |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 827 | struct inode *inode; |
| 828 | struct nfs_server *server; |
| 829 | |
| 830 | if (!(ctx->mode & FMODE_WRITE)) |
| 831 | return; |
| 832 | if (!is_sync) |
| 833 | return; |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 834 | inode = d_inode(ctx->dentry); |
Trond Myklebust | 58ff418 | 2016-12-16 17:39:58 -0500 | [diff] [blame] | 835 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
| 836 | return; |
Trond Myklebust | 5cf9d70 | 2015-09-04 15:07:37 -0400 | [diff] [blame] | 837 | nfsi = NFS_I(inode); |
| 838 | if (inode->i_mapping->nrpages == 0) |
| 839 | return; |
| 840 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
| 841 | return; |
| 842 | if (!list_empty(&nfsi->open_files)) |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 843 | return; |
| 844 | server = NFS_SERVER(inode); |
| 845 | if (server->flags & NFS_MOUNT_NOCTO) |
| 846 | return; |
| 847 | nfs_revalidate_inode(server, inode); |
| 848 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 849 | EXPORT_SYMBOL_GPL(nfs_close_context); |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 850 | |
NeilBrown | 532d4de | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 851 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
| 852 | fmode_t f_mode, |
| 853 | struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | { |
| 855 | struct nfs_open_context *ctx; |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 856 | struct rpc_cred *cred = rpc_lookup_cred(); |
| 857 | if (IS_ERR(cred)) |
| 858 | return ERR_CAST(cred); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 860 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 861 | if (!ctx) { |
| 862 | put_rpccred(cred); |
| 863 | return ERR_PTR(-ENOMEM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | } |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 865 | nfs_sb_active(dentry->d_sb); |
| 866 | ctx->dentry = dget(dentry); |
| 867 | ctx->cred = cred; |
| 868 | ctx->state = NULL; |
| 869 | ctx->mode = f_mode; |
| 870 | ctx->flags = 0; |
| 871 | ctx->error = 0; |
NeilBrown | 532d4de | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 872 | ctx->flock_owner = (fl_owner_t)filp; |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 873 | nfs_init_lock_context(&ctx->lock_context); |
| 874 | ctx->lock_context.open_context = ctx; |
| 875 | INIT_LIST_HEAD(&ctx->list); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 876 | ctx->mdsthreshold = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | return ctx; |
| 878 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 879 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 880 | |
| 881 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) |
| 882 | { |
| 883 | if (ctx != NULL) |
Trond Myklebust | f11ac8d | 2010-06-25 16:35:53 -0400 | [diff] [blame] | 884 | atomic_inc(&ctx->lock_context.count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | return ctx; |
| 886 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 887 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
Trond Myklebust | 7fe5c39 | 2009-03-19 15:35:50 -0400 | [diff] [blame] | 889 | 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] | 890 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 891 | struct inode *inode = d_inode(ctx->dentry); |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 892 | struct super_block *sb = ctx->dentry->d_sb; |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 893 | |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 894 | if (!list_empty(&ctx->list)) { |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 895 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
| 896 | return; |
| 897 | list_del(&ctx->list); |
| 898 | spin_unlock(&inode->i_lock); |
Benny Halevy | ef84303 | 2010-09-23 12:22:09 -0400 | [diff] [blame] | 899 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
Trond Myklebust | 5e11934 | 2007-07-26 12:06:17 -0400 | [diff] [blame] | 900 | return; |
Trond Myklebust | 5c78f58 | 2010-09-27 15:51:20 -0400 | [diff] [blame] | 901 | if (inode != NULL) |
| 902 | NFS_PROTO(inode)->close_context(ctx, is_sync); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 903 | if (ctx->cred != NULL) |
| 904 | put_rpccred(ctx->cred); |
Al Viro | 3d4ff43 | 2011-06-22 18:40:12 -0400 | [diff] [blame] | 905 | dput(ctx->dentry); |
Trond Myklebust | 322b2b9 | 2013-01-11 16:39:51 -0500 | [diff] [blame] | 906 | nfs_sb_deactive(sb); |
Andy Adamson | 82be417 | 2012-05-23 05:02:35 -0400 | [diff] [blame] | 907 | kfree(ctx->mdsthreshold); |
Trond Myklebust | 3bec63d | 2007-06-17 16:02:44 -0400 | [diff] [blame] | 908 | kfree(ctx); |
| 909 | } |
| 910 | |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 911 | void put_nfs_open_context(struct nfs_open_context *ctx) |
| 912 | { |
| 913 | __put_nfs_open_context(ctx, 0); |
| 914 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 915 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
Trond Myklebust | a49c3c7 | 2007-10-18 18:03:27 -0400 | [diff] [blame] | 916 | |
Trond Myklebust | 4eae501 | 2015-09-04 15:17:53 -0400 | [diff] [blame] | 917 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
| 918 | { |
| 919 | __put_nfs_open_context(ctx, 1); |
| 920 | } |
| 921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 922 | /* |
| 923 | * Ensure that mmap has a recent RPC credential for use when writing out |
| 924 | * shared pages |
| 925 | */ |
Trond Myklebust | c45ffdd | 2013-05-29 13:34:46 -0400 | [diff] [blame] | 926 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 928 | struct inode *inode = d_inode(ctx->dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | struct nfs_inode *nfsi = NFS_I(inode); |
| 930 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 931 | spin_lock(&inode->i_lock); |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 932 | if (ctx->mode & FMODE_WRITE) |
| 933 | list_add(&ctx->list, &nfsi->open_files); |
| 934 | else |
| 935 | list_add_tail(&ctx->list, &nfsi->open_files); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | spin_unlock(&inode->i_lock); |
| 937 | } |
Trond Myklebust | c45ffdd | 2013-05-29 13:34:46 -0400 | [diff] [blame] | 938 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
| 939 | |
| 940 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
| 941 | { |
| 942 | filp->private_data = get_nfs_open_context(ctx); |
| 943 | if (list_empty(&ctx->list)) |
| 944 | nfs_inode_attach_open_context(ctx); |
| 945 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 946 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 948 | /* |
| 949 | * Given an inode, search for an open context with the desired characteristics |
| 950 | */ |
Trond Myklebust | dc0b027 | 2008-12-23 15:21:56 -0500 | [diff] [blame] | 951 | 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] | 952 | { |
| 953 | struct nfs_inode *nfsi = NFS_I(inode); |
| 954 | struct nfs_open_context *pos, *ctx = NULL; |
| 955 | |
| 956 | spin_lock(&inode->i_lock); |
| 957 | list_for_each_entry(pos, &nfsi->open_files, list) { |
Trond Myklebust | d530838 | 2005-11-04 15:33:38 -0500 | [diff] [blame] | 958 | if (cred != NULL && pos->cred != cred) |
| 959 | continue; |
Trond Myklebust | 1544fa0 | 2010-03-25 13:54:49 -0400 | [diff] [blame] | 960 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
| 961 | continue; |
| 962 | ctx = get_nfs_open_context(pos); |
| 963 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | spin_unlock(&inode->i_lock); |
| 966 | return ctx; |
| 967 | } |
| 968 | |
Anna Schumaker | aff8d8d | 2015-07-13 14:01:33 -0400 | [diff] [blame] | 969 | void nfs_file_clear_open_context(struct file *filp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | { |
Trond Myklebust | cd3758e | 2007-08-10 17:44:32 -0400 | [diff] [blame] | 971 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | |
| 973 | if (ctx) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 974 | struct inode *inode = d_inode(ctx->dentry); |
Trond Myklebust | c45ffdd | 2013-05-29 13:34:46 -0400 | [diff] [blame] | 975 | |
Peng Tao | 0bcbf03 | 2015-12-05 15:57:31 +0800 | [diff] [blame] | 976 | /* |
| 977 | * We fatal error on write before. Try to writeback |
| 978 | * every page again. |
| 979 | */ |
| 980 | if (ctx->error < 0) |
| 981 | invalidate_inode_pages2(inode->i_mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 982 | filp->private_data = NULL; |
| 983 | spin_lock(&inode->i_lock); |
| 984 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); |
| 985 | spin_unlock(&inode->i_lock); |
Trond Myklebust | 4eae501 | 2015-09-04 15:17:53 -0400 | [diff] [blame] | 986 | put_nfs_open_context_sync(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 987 | } |
| 988 | } |
| 989 | |
| 990 | /* |
| 991 | * These allocate and release file read/write context information. |
| 992 | */ |
| 993 | int nfs_open(struct inode *inode, struct file *filp) |
| 994 | { |
| 995 | struct nfs_open_context *ctx; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
NeilBrown | 532d4de | 2016-10-13 15:26:47 +1100 | [diff] [blame] | 997 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp); |
Al Viro | 5ede7b1 | 2011-10-23 18:49:54 -0400 | [diff] [blame] | 998 | if (IS_ERR(ctx)) |
| 999 | return PTR_ERR(ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | nfs_file_set_open_context(filp, ctx); |
| 1001 | put_nfs_open_context(ctx); |
David Howells | f1fe29b | 2013-09-27 11:20:03 +0100 | [diff] [blame] | 1002 | nfs_fscache_open_file(inode, filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1003 | return 0; |
| 1004 | } |
| 1005 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | /* |
| 1007 | * This function is called whenever some part of NFS notices that |
| 1008 | * the cached attributes have to be refreshed. |
| 1009 | */ |
| 1010 | int |
| 1011 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1012 | { |
| 1013 | int status = -ESTALE; |
David Quigley | 1775fd3 | 2013-05-22 12:50:42 -0400 | [diff] [blame] | 1014 | struct nfs4_label *label = NULL; |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 1015 | struct nfs_fattr *fattr = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | struct nfs_inode *nfsi = NFS_I(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1017 | |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1018 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
| 1019 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1021 | trace_nfs_revalidate_inode_enter(inode); |
| 1022 | |
Chuck Lever | 85233a7 | 2006-10-19 23:28:42 -0700 | [diff] [blame] | 1023 | if (is_bad_inode(inode)) |
Chuck Lever | 412d582 | 2005-08-18 11:24:11 -0700 | [diff] [blame] | 1024 | goto out; |
Trond Myklebust | 7fdc49c | 2007-09-28 19:11:33 -0400 | [diff] [blame] | 1025 | if (NFS_STALE(inode)) |
| 1026 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Trond Myklebust | ac46bd3 | 2016-07-05 13:46:53 -0400 | [diff] [blame] | 1028 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
| 1029 | if (S_ISREG(inode->i_mode)) { |
| 1030 | status = pnfs_sync_inode(inode, false); |
| 1031 | if (status) |
| 1032 | goto out; |
| 1033 | } |
| 1034 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 1035 | status = -ENOMEM; |
| 1036 | fattr = nfs_alloc_fattr(); |
| 1037 | if (fattr == NULL) |
| 1038 | goto out; |
| 1039 | |
Trond Myklebust | 691beb1 | 2008-10-05 14:48:22 -0400 | [diff] [blame] | 1040 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
David Quigley | 14c43f7 | 2013-05-22 12:50:43 -0400 | [diff] [blame] | 1041 | |
| 1042 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); |
| 1043 | if (IS_ERR(label)) { |
| 1044 | status = PTR_ERR(label); |
| 1045 | goto out; |
| 1046 | } |
| 1047 | |
David Quigley | 1775fd3 | 2013-05-22 12:50:42 -0400 | [diff] [blame] | 1048 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | if (status != 0) { |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1050 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | inode->i_sb->s_id, |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1052 | (unsigned long long)NFS_FILEID(inode), status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | if (status == -ESTALE) { |
| 1054 | nfs_zap_caches(inode); |
| 1055 | if (!S_ISDIR(inode->i_mode)) |
Benny Halevy | 3a10c30 | 2008-01-23 08:58:59 +0200 | [diff] [blame] | 1056 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | } |
David Quigley | 14c43f7 | 2013-05-22 12:50:43 -0400 | [diff] [blame] | 1058 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1059 | } |
| 1060 | |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 1061 | status = nfs_refresh_inode(inode, fattr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1062 | if (status) { |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1063 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | inode->i_sb->s_id, |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1065 | (unsigned long long)NFS_FILEID(inode), status); |
David Quigley | 14c43f7 | 2013-05-22 12:50:43 -0400 | [diff] [blame] | 1066 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1067 | } |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1068 | |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1069 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
Trond Myklebust | ada70d9 | 2005-06-22 17:16:22 +0000 | [diff] [blame] | 1070 | nfs_zap_acl_cache(inode); |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1071 | |
Jeff Layton | 3da580a | 2013-11-02 06:57:18 -0400 | [diff] [blame] | 1072 | nfs_setsecurity(inode, fattr, label); |
| 1073 | |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1074 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | inode->i_sb->s_id, |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1076 | (unsigned long long)NFS_FILEID(inode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | |
David Quigley | 14c43f7 | 2013-05-22 12:50:43 -0400 | [diff] [blame] | 1078 | err_out: |
| 1079 | nfs4_label_free(label); |
| 1080 | out: |
Trond Myklebust | a3cba2a | 2010-04-16 16:22:49 -0400 | [diff] [blame] | 1081 | nfs_free_fattr(fattr); |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1082 | trace_nfs_revalidate_inode_exit(inode, status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | return status; |
| 1084 | } |
| 1085 | |
Scott Mayhew | 43f291c | 2013-07-05 17:49:30 -0400 | [diff] [blame] | 1086 | int nfs_attribute_cache_expired(struct inode *inode) |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 1087 | { |
Trond Myklebust | b4d2314 | 2010-03-10 15:21:44 -0500 | [diff] [blame] | 1088 | if (nfs_have_delegated_attributes(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1089 | return 0; |
Trond Myklebust | d7cf8dd | 2010-04-16 16:42:46 -0400 | [diff] [blame] | 1090 | return nfs_attribute_timeout(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | } |
| 1092 | |
| 1093 | /** |
| 1094 | * nfs_revalidate_inode - Revalidate the inode attributes |
| 1095 | * @server - pointer to nfs_server struct |
| 1096 | * @inode - pointer to inode struct |
| 1097 | * |
| 1098 | * Updates inode attribute information by retrieving the data from the server. |
| 1099 | */ |
| 1100 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) |
| 1101 | { |
Trond Myklebust | 311324a | 2014-02-07 17:02:08 -0500 | [diff] [blame] | 1102 | if (!nfs_need_revalidate_inode(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1103 | return NFS_STALE(inode) ? -ESTALE : 0; |
| 1104 | return __nfs_revalidate_inode(server, inode); |
| 1105 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 1106 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | |
Trond Myklebust | 1cda707 | 2010-02-19 17:03:30 -0800 | [diff] [blame] | 1108 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1109 | { |
| 1110 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | f8806c8 | 2013-08-05 13:26:31 -0400 | [diff] [blame] | 1111 | int ret; |
| 1112 | |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1113 | if (mapping->nrpages != 0) { |
Trond Myklebust | f8806c8 | 2013-08-05 13:26:31 -0400 | [diff] [blame] | 1114 | if (S_ISREG(inode->i_mode)) { |
Trond Myklebust | ef070dc | 2015-03-03 00:06:35 -0500 | [diff] [blame] | 1115 | unmap_mapping_range(mapping, 0, 0, 0); |
Trond Myklebust | f8806c8 | 2013-08-05 13:26:31 -0400 | [diff] [blame] | 1116 | ret = nfs_sync_mapping(mapping); |
| 1117 | if (ret < 0) |
| 1118 | return ret; |
| 1119 | } |
| 1120 | ret = invalidate_inode_pages2(mapping); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1121 | if (ret < 0) |
| 1122 | return ret; |
| 1123 | } |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1124 | if (S_ISDIR(inode->i_mode)) { |
| 1125 | spin_lock(&inode->i_lock); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1126 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1127 | spin_unlock(&inode->i_lock); |
| 1128 | } |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1129 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1130 | nfs_fscache_wait_on_invalidate(inode); |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1131 | |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1132 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
| 1133 | inode->i_sb->s_id, |
| 1134 | (unsigned long long)NFS_FILEID(inode)); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1135 | return 0; |
| 1136 | } |
| 1137 | |
Trond Myklebust | 1cd9cb0 | 2016-12-04 18:34:34 -0500 | [diff] [blame] | 1138 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
Trond Myklebust | b4b1ead | 2012-04-29 11:23:50 -0400 | [diff] [blame] | 1139 | { |
Trond Myklebust | 61540bf | 2016-12-08 18:18:38 -0500 | [diff] [blame] | 1140 | return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) || |
| 1141 | NFS_STALE(inode); |
Trond Myklebust | b4b1ead | 2012-04-29 11:23:50 -0400 | [diff] [blame] | 1142 | } |
| 1143 | |
Al Viro | 0d0def4 | 2015-11-17 21:14:24 -0500 | [diff] [blame] | 1144 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
| 1145 | { |
| 1146 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1147 | unsigned long *bitlock = &nfsi->flags; |
| 1148 | int ret = 0; |
| 1149 | |
| 1150 | if (IS_SWAPFILE(inode)) |
| 1151 | goto out; |
| 1152 | if (nfs_mapping_need_revalidate_inode(inode)) { |
| 1153 | ret = -ECHILD; |
| 1154 | goto out; |
| 1155 | } |
| 1156 | spin_lock(&inode->i_lock); |
| 1157 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || |
| 1158 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) |
| 1159 | ret = -ECHILD; |
| 1160 | spin_unlock(&inode->i_lock); |
| 1161 | out: |
| 1162 | return ret; |
| 1163 | } |
| 1164 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | /** |
Trond Myklebust | be52749 | 2016-06-22 08:19:36 -0400 | [diff] [blame] | 1166 | * nfs_revalidate_mapping - Revalidate the pagecache |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1167 | * @inode - pointer to host inode |
| 1168 | * @mapping - pointer to mapping |
| 1169 | */ |
Trond Myklebust | be52749 | 2016-06-22 08:19:36 -0400 | [diff] [blame] | 1170 | int nfs_revalidate_mapping(struct inode *inode, |
| 1171 | struct address_space *mapping) |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1172 | { |
| 1173 | struct nfs_inode *nfsi = NFS_I(inode); |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1174 | unsigned long *bitlock = &nfsi->flags; |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1175 | int ret = 0; |
| 1176 | |
Mel Gorman | 29418aa | 2012-07-31 16:45:10 -0700 | [diff] [blame] | 1177 | /* swapfiles are not supposed to be shared. */ |
| 1178 | if (IS_SWAPFILE(inode)) |
| 1179 | goto out; |
| 1180 | |
Trond Myklebust | b4b1ead | 2012-04-29 11:23:50 -0400 | [diff] [blame] | 1181 | if (nfs_mapping_need_revalidate_inode(inode)) { |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1182 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1183 | if (ret < 0) |
| 1184 | goto out; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1185 | } |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1186 | |
| 1187 | /* |
| 1188 | * We must clear NFS_INO_INVALID_DATA first to ensure that |
| 1189 | * invalidations that come in while we're shooting down the mappings |
| 1190 | * are respected. But, that leaves a race window where one revalidator |
| 1191 | * can clear the flag, and then another checks it before the mapping |
| 1192 | * gets invalidated. Fix that by serializing access to this part of |
| 1193 | * the function. |
| 1194 | * |
| 1195 | * At the same time, we need to allow other tasks to see whether we |
| 1196 | * might be in the middle of invalidating the pages, so we only set |
| 1197 | * the bit lock here if it looks like we're going to be doing that. |
| 1198 | */ |
| 1199 | for (;;) { |
NeilBrown | 7431620 | 2014-07-07 15:16:04 +1000 | [diff] [blame] | 1200 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
| 1201 | nfs_wait_bit_killable, TASK_KILLABLE); |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1202 | if (ret) |
| 1203 | goto out; |
Trond Myklebust | 17dfeb9 | 2014-01-28 09:37:16 -0500 | [diff] [blame] | 1204 | spin_lock(&inode->i_lock); |
| 1205 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { |
| 1206 | spin_unlock(&inode->i_lock); |
| 1207 | continue; |
| 1208 | } |
| 1209 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1210 | break; |
Trond Myklebust | 17dfeb9 | 2014-01-28 09:37:16 -0500 | [diff] [blame] | 1211 | spin_unlock(&inode->i_lock); |
| 1212 | goto out; |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1213 | } |
| 1214 | |
Trond Myklebust | 17dfeb9 | 2014-01-28 09:37:16 -0500 | [diff] [blame] | 1215 | set_bit(NFS_INO_INVALIDATING, bitlock); |
Jeff Layton | 4db72b4 | 2014-01-28 13:47:46 -0500 | [diff] [blame] | 1216 | smp_wmb(); |
Trond Myklebust | 17dfeb9 | 2014-01-28 09:37:16 -0500 | [diff] [blame] | 1217 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
| 1218 | spin_unlock(&inode->i_lock); |
| 1219 | trace_nfs_invalidate_mapping_enter(inode); |
Trond Myklebust | be52749 | 2016-06-22 08:19:36 -0400 | [diff] [blame] | 1220 | ret = nfs_invalidate_mapping(inode, mapping); |
Trond Myklebust | 17dfeb9 | 2014-01-28 09:37:16 -0500 | [diff] [blame] | 1221 | trace_nfs_invalidate_mapping_exit(inode, ret); |
Trond Myklebust | 717d44e | 2007-01-24 11:54:55 -0800 | [diff] [blame] | 1222 | |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1223 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
Peter Zijlstra | 4e857c5 | 2014-03-17 18:06:10 +0100 | [diff] [blame] | 1224 | smp_mb__after_atomic(); |
Jeff Layton | d529ef8 | 2014-01-27 13:46:15 -0500 | [diff] [blame] | 1225 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
Trond Myklebust | cd9ae2b | 2006-10-19 23:28:40 -0700 | [diff] [blame] | 1226 | out: |
Trond Myklebust | 44b1187 | 2006-05-25 01:40:59 -0400 | [diff] [blame] | 1227 | return ret; |
Trond Myklebust | 7d52e86 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1228 | } |
| 1229 | |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1230 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
Trond Myklebust | 874f946 | 2015-03-02 23:32:08 -0500 | [diff] [blame] | 1231 | { |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1232 | struct inode *inode = &nfsi->vfs_inode; |
| 1233 | |
| 1234 | assert_spin_locked(&inode->i_lock); |
| 1235 | |
| 1236 | if (!S_ISREG(inode->i_mode)) |
| 1237 | return false; |
| 1238 | if (list_empty(&nfsi->open_files)) |
| 1239 | return false; |
| 1240 | /* Note: This relies on nfsi->open_files being ordered with writers |
| 1241 | * being placed at the head of the list. |
| 1242 | * See nfs_inode_attach_open_context() |
| 1243 | */ |
| 1244 | return (list_first_entry(&nfsi->open_files, |
| 1245 | struct nfs_open_context, |
| 1246 | list)->mode & FMODE_WRITE) == FMODE_WRITE; |
Trond Myklebust | 874f946 | 2015-03-02 23:32:08 -0500 | [diff] [blame] | 1247 | } |
| 1248 | |
Trond Myklebust | 651b0e7 | 2016-06-25 17:24:46 -0400 | [diff] [blame] | 1249 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
Trond Myklebust | 874f946 | 2015-03-02 23:32:08 -0500 | [diff] [blame] | 1250 | { |
Trond Myklebust | 651b0e7 | 2016-06-25 17:24:46 -0400 | [diff] [blame] | 1251 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
Trond Myklebust | 874f946 | 2015-03-02 23:32:08 -0500 | [diff] [blame] | 1252 | } |
| 1253 | |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1254 | 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] | 1255 | { |
| 1256 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1257 | unsigned long ret = 0; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1258 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1259 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
| 1260 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1261 | && inode->i_version == fattr->pre_change_attr) { |
| 1262 | inode->i_version = fattr->change_attr; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1263 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 1264 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1265 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1266 | } |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1267 | /* If we have atomic WCC data, we may update some attributes */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1268 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
| 1269 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1270 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
| 1271 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
| 1272 | ret |= NFS_INO_INVALID_ATTR; |
| 1273 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1274 | |
| 1275 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
| 1276 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) |
| 1277 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1278 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
| 1279 | if (S_ISDIR(inode->i_mode)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 1280 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1281 | ret |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1282 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1283 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
| 1284 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) |
| 1285 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 1286 | && nfsi->nrequests == 0) { |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1287 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
| 1288 | ret |= NFS_INO_INVALID_ATTR; |
| 1289 | } |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1290 | |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1291 | return ret; |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1292 | } |
| 1293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | /** |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1295 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | * @inode - pointer to inode |
| 1297 | * @fattr - updated attributes |
| 1298 | * |
| 1299 | * Verifies the attribute cache. If we have just changed the attributes, |
| 1300 | * so that fattr carries weak cache consistency data, then it may |
| 1301 | * also update the ctime/mtime/change_attribute. |
| 1302 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1303 | 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] | 1304 | { |
| 1305 | struct nfs_inode *nfsi = NFS_I(inode); |
| 1306 | loff_t cur_size, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1307 | unsigned long invalid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1308 | |
Chuck Lever | dc59250 | 2005-08-18 11:24:12 -0700 | [diff] [blame] | 1309 | |
Trond Myklebust | 01da47b | 2012-04-29 12:30:19 -0400 | [diff] [blame] | 1310 | if (nfs_have_delegated_attributes(inode)) |
| 1311 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1312 | /* Has the inode gone and changed behind our back? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1313 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1314 | return -EIO; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1315 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
| 1316 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | |
Trond Myklebust | 651b0e7 | 2016-06-25 17:24:46 -0400 | [diff] [blame] | 1318 | if (!nfs_file_has_buffered_writers(nfsi)) { |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1319 | /* Verify a few of the more important attributes */ |
| 1320 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode->i_version != fattr->change_attr) |
| 1321 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1323 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
| 1324 | invalid |= NFS_INO_INVALID_ATTR; |
Trond Myklebust | ca62b9c | 2006-03-20 13:44:07 -0500 | [diff] [blame] | 1325 | |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1326 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&inode->i_ctime, &fattr->ctime)) |
| 1327 | invalid |= NFS_INO_INVALID_ATTR; |
| 1328 | |
| 1329 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1330 | cur_size = i_size_read(inode); |
| 1331 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1332 | if (cur_size != new_isize) |
| 1333 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
| 1334 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1335 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1336 | |
| 1337 | /* Have any file permissions changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1338 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
| 1339 | 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] | 1340 | 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] | 1341 | 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] | 1342 | 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] | 1343 | 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] | 1344 | |
| 1345 | /* Has the link count changed? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1346 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1347 | invalid |= NFS_INO_INVALID_ATTR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1349 | 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] | 1350 | invalid |= NFS_INO_INVALID_ATIME; |
| 1351 | |
| 1352 | if (invalid != 0) |
Trond Myklebust | 1ad13db | 2016-10-27 18:42:04 -0400 | [diff] [blame] | 1353 | nfs_set_cache_invalid(inode, invalid | NFS_INO_REVAL_FORCED); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1355 | nfsi->read_cache_jiffies = fattr->time_start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1356 | return 0; |
| 1357 | } |
| 1358 | |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1359 | static atomic_long_t nfs_attr_generation_counter; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1360 | |
| 1361 | static unsigned long nfs_read_attr_generation_counter(void) |
| 1362 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1363 | return atomic_long_read(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1364 | } |
| 1365 | |
| 1366 | unsigned long nfs_inc_attr_generation_counter(void) |
| 1367 | { |
Trond Myklebust | ae05f26 | 2008-10-28 15:21:40 -0400 | [diff] [blame] | 1368 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1369 | } |
Trond Myklebust | 3235b40 | 2015-02-26 19:52:06 -0500 | [diff] [blame] | 1370 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1371 | |
| 1372 | void nfs_fattr_init(struct nfs_fattr *fattr) |
| 1373 | { |
| 1374 | fattr->valid = 0; |
| 1375 | fattr->time_start = jiffies; |
| 1376 | fattr->gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6926afd | 2012-01-07 13:22:46 -0500 | [diff] [blame] | 1377 | fattr->owner_name = NULL; |
| 1378 | fattr->group_name = NULL; |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1379 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1380 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1381 | |
Trond Myklebust | 140e049 | 2015-02-26 17:42:42 -0500 | [diff] [blame] | 1382 | /** |
| 1383 | * nfs_fattr_set_barrier |
| 1384 | * @fattr: attributes |
| 1385 | * |
| 1386 | * Used to set a barrier after an attribute was updated. This |
| 1387 | * barrier ensures that older attributes from RPC calls that may |
| 1388 | * have raced with our update cannot clobber these new values. |
| 1389 | * Note that you are still responsible for ensuring that other |
| 1390 | * operations which change the attribute on the server do not |
| 1391 | * collide. |
| 1392 | */ |
| 1393 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) |
| 1394 | { |
| 1395 | fattr->gencount = nfs_inc_attr_generation_counter(); |
| 1396 | } |
| 1397 | |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1398 | struct nfs_fattr *nfs_alloc_fattr(void) |
| 1399 | { |
| 1400 | struct nfs_fattr *fattr; |
| 1401 | |
| 1402 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); |
| 1403 | if (fattr != NULL) |
| 1404 | nfs_fattr_init(fattr); |
| 1405 | return fattr; |
| 1406 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1407 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1408 | |
| 1409 | struct nfs_fh *nfs_alloc_fhandle(void) |
| 1410 | { |
| 1411 | struct nfs_fh *fh; |
| 1412 | |
| 1413 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); |
| 1414 | if (fh != NULL) |
| 1415 | fh->size = 0; |
| 1416 | return fh; |
| 1417 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1418 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
Trond Myklebust | 2d36bfde | 2010-04-16 16:22:45 -0400 | [diff] [blame] | 1419 | |
Trond Myklebust | e27d359 | 2012-03-18 14:07:42 -0400 | [diff] [blame] | 1420 | #ifdef NFS_DEBUG |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1421 | /* |
| 1422 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle |
| 1423 | * in the same way that wireshark does |
| 1424 | * |
| 1425 | * @fh: file handle |
| 1426 | * |
| 1427 | * For debugging only. |
| 1428 | */ |
| 1429 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) |
| 1430 | { |
| 1431 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise |
| 1432 | * not on the result */ |
Trond Myklebust | 1264a2f | 2013-08-12 16:06:31 -0400 | [diff] [blame] | 1433 | return nfs_fhandle_hash(fh); |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1434 | } |
Chuck Lever | 9e6ee76 | 2013-10-17 14:12:45 -0400 | [diff] [blame] | 1435 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1436 | |
| 1437 | /* |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1438 | * _nfs_display_fhandle - display an NFS file handle on the console |
| 1439 | * |
| 1440 | * @fh: file handle to display |
| 1441 | * @caption: display caption |
| 1442 | * |
| 1443 | * For debugging only. |
| 1444 | */ |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1445 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
| 1446 | { |
| 1447 | unsigned short i; |
| 1448 | |
Trond Myklebust | fa68a1b | 2012-03-06 10:14:35 -0500 | [diff] [blame] | 1449 | if (fh == NULL || fh->size == 0) { |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1450 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
| 1451 | return; |
| 1452 | } |
| 1453 | |
Weston Andros Adamson | d8e0539 | 2012-03-06 20:46:43 -0500 | [diff] [blame] | 1454 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
| 1455 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1456 | for (i = 0; i < fh->size; i += 16) { |
| 1457 | __be32 *pos = (__be32 *)&fh->data[i]; |
| 1458 | |
| 1459 | switch ((fh->size - i - 1) >> 2) { |
| 1460 | case 0: |
| 1461 | printk(KERN_DEFAULT " %08x\n", |
| 1462 | be32_to_cpup(pos)); |
| 1463 | break; |
| 1464 | case 1: |
| 1465 | printk(KERN_DEFAULT " %08x %08x\n", |
| 1466 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); |
| 1467 | break; |
| 1468 | case 2: |
| 1469 | printk(KERN_DEFAULT " %08x %08x %08x\n", |
| 1470 | be32_to_cpup(pos), be32_to_cpup(pos + 1), |
| 1471 | be32_to_cpup(pos + 2)); |
| 1472 | break; |
| 1473 | default: |
| 1474 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", |
| 1475 | be32_to_cpup(pos), be32_to_cpup(pos + 1), |
| 1476 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); |
| 1477 | } |
| 1478 | } |
| 1479 | } |
Chuck Lever | 9e6ee76 | 2013-10-17 14:12:45 -0400 | [diff] [blame] | 1480 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
Chuck Lever | 20d27e9 | 2012-03-01 17:01:31 -0500 | [diff] [blame] | 1481 | #endif |
| 1482 | |
| 1483 | /** |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1484 | * nfs_inode_attrs_need_update - check if the inode attributes need updating |
| 1485 | * @inode - pointer to inode |
| 1486 | * @fattr - attributes |
| 1487 | * |
| 1488 | * Attempt to divine whether or not an RPC call reply carrying stale |
| 1489 | * attributes got scheduled after another call carrying updated ones. |
| 1490 | * |
| 1491 | * To do so, the function first assumes that a more recent ctime means |
| 1492 | * that the attributes in fattr are newer, however it also attempt to |
| 1493 | * catch the case where ctime either didn't change, or went backwards |
| 1494 | * (if someone reset the clock on the server) by looking at whether |
| 1495 | * 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] | 1496 | * Note also the check for wraparound of 'attr_gencount' |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1497 | * |
| 1498 | * The function returns 'true' if it thinks the attributes in 'fattr' are |
| 1499 | * more recent than the ones cached in the inode. |
| 1500 | * |
| 1501 | */ |
| 1502 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) |
| 1503 | { |
| 1504 | const struct nfs_inode *nfsi = NFS_I(inode); |
| 1505 | |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1506 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1507 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1508 | } |
| 1509 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1510 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1511 | { |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1512 | int ret; |
| 1513 | |
| 1514 | trace_nfs_refresh_inode_enter(inode); |
| 1515 | |
Trond Myklebust | a10ad17 | 2008-09-23 17:28:41 -0400 | [diff] [blame] | 1516 | if (nfs_inode_attrs_need_update(inode, fattr)) |
Trond Myklebust | f4ce129 | 2013-08-19 18:59:33 -0400 | [diff] [blame] | 1517 | ret = nfs_update_inode(inode, fattr); |
| 1518 | else |
| 1519 | ret = nfs_check_inode_attributes(inode, fattr); |
| 1520 | |
| 1521 | trace_nfs_refresh_inode_exit(inode, ret); |
| 1522 | return ret; |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1523 | } |
| 1524 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1525 | /** |
| 1526 | * nfs_refresh_inode - try to update the inode attribute cache |
| 1527 | * @inode - pointer to inode |
| 1528 | * @fattr - updated attributes |
| 1529 | * |
| 1530 | * Check that an RPC call that returned attributes has not overlapped with |
| 1531 | * other recent updates of the inode metadata, then decide whether it is |
| 1532 | * safe to do a full update of the inode attributes, or whether just to |
| 1533 | * call nfs_check_inode_attributes. |
| 1534 | */ |
| 1535 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1536 | { |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1537 | int status; |
| 1538 | |
| 1539 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1540 | return 0; |
| 1541 | spin_lock(&inode->i_lock); |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1542 | status = nfs_refresh_inode_locked(inode, fattr); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1543 | spin_unlock(&inode->i_lock); |
David Howells | ef79c09 | 2009-04-03 16:42:43 +0100 | [diff] [blame] | 1544 | |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1545 | return status; |
| 1546 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1547 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1548 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1549 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
| 1550 | { |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1551 | unsigned long invalid = NFS_INO_INVALID_ATTR; |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1552 | |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 1553 | if (S_ISDIR(inode->i_mode)) |
| 1554 | invalid |= NFS_INO_INVALID_DATA; |
| 1555 | nfs_set_cache_invalid(inode, invalid); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1556 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
| 1557 | return 0; |
| 1558 | return nfs_refresh_inode_locked(inode, fattr); |
| 1559 | } |
| 1560 | |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1561 | /** |
| 1562 | * nfs_post_op_update_inode - try to update the inode attribute cache |
| 1563 | * @inode - pointer to inode |
| 1564 | * @fattr - updated attributes |
| 1565 | * |
| 1566 | * After an operation that has changed the inode metadata, mark the |
| 1567 | * attribute cache as being invalid, then try to update it. |
Chuck Lever | f551e44 | 2006-09-20 14:33:04 -0400 | [diff] [blame] | 1568 | * |
| 1569 | * NB: if the server didn't return any post op attributes, this |
| 1570 | * function will force the retrieval of attributes before the next |
| 1571 | * NFS request. Thus it should be used only for operations that |
| 1572 | * are expected to change one or more attributes, to avoid |
| 1573 | * unnecessary NFS requests and trips through nfs_update_inode(). |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1574 | */ |
| 1575 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
| 1576 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1577 | int status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1578 | |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1579 | spin_lock(&inode->i_lock); |
Trond Myklebust | 92d64e4 | 2015-02-26 19:48:26 -0500 | [diff] [blame] | 1580 | nfs_fattr_set_barrier(fattr); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1581 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | 7668fdb | 2007-10-01 09:59:15 -0400 | [diff] [blame] | 1582 | spin_unlock(&inode->i_lock); |
David Quigley | aa9c266 | 2013-05-22 12:50:44 -0400 | [diff] [blame] | 1583 | |
Trond Myklebust | 870a5be | 2008-10-05 12:07:23 -0400 | [diff] [blame] | 1584 | return status; |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1585 | } |
Bryan Schumaker | 1c606fb | 2012-07-30 16:05:24 -0400 | [diff] [blame] | 1586 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
Trond Myklebust | decf491 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1587 | |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1588 | /** |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1589 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1590 | * @inode - pointer to inode |
| 1591 | * @fattr - updated attributes |
| 1592 | * |
| 1593 | * After an operation that has changed the inode metadata, mark the |
| 1594 | * attribute cache as being invalid, then try to update it. Fake up |
| 1595 | * weak cache consistency data, if none exist. |
| 1596 | * |
| 1597 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1598 | */ |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1599 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1600 | { |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1601 | int status; |
| 1602 | |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1603 | /* Don't do a WCC update if these attributes are already stale */ |
| 1604 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || |
| 1605 | !nfs_inode_attrs_need_update(inode, fattr)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1606 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
| 1607 | | NFS_ATTR_FATTR_PRESIZE |
| 1608 | | NFS_ATTR_FATTR_PREMTIME |
| 1609 | | NFS_ATTR_FATTR_PRECTIME); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1610 | goto out_noforce; |
| 1611 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1612 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
| 1613 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1614 | fattr->pre_change_attr = inode->i_version; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1615 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1616 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1617 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
| 1618 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1619 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1620 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
| 1621 | } |
| 1622 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && |
| 1623 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1624 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1625 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
| 1626 | } |
| 1627 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && |
| 1628 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { |
Trond Myklebust | a3d0145 | 2008-06-11 12:21:19 -0400 | [diff] [blame] | 1629 | fattr->pre_size = i_size_read(inode); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1630 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1631 | } |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1632 | out_noforce: |
| 1633 | status = nfs_post_op_update_inode_locked(inode, fattr); |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1634 | return status; |
| 1635 | } |
| 1636 | |
| 1637 | /** |
| 1638 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache |
| 1639 | * @inode - pointer to inode |
| 1640 | * @fattr - updated attributes |
| 1641 | * |
| 1642 | * After an operation that has changed the inode metadata, mark the |
| 1643 | * attribute cache as being invalid, then try to update it. Fake up |
| 1644 | * weak cache consistency data, if none exist. |
| 1645 | * |
| 1646 | * This function is mainly designed to be used by the ->write_done() functions. |
| 1647 | */ |
| 1648 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) |
| 1649 | { |
| 1650 | int status; |
| 1651 | |
| 1652 | spin_lock(&inode->i_lock); |
Trond Myklebust | 8f8ba1d | 2015-02-26 17:54:58 -0500 | [diff] [blame] | 1653 | nfs_fattr_set_barrier(fattr); |
Trond Myklebust | a08a8cd | 2015-02-26 17:36:09 -0500 | [diff] [blame] | 1654 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
Trond Myklebust | d65f557 | 2008-10-05 12:27:55 -0400 | [diff] [blame] | 1655 | spin_unlock(&inode->i_lock); |
| 1656 | return status; |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1657 | } |
Bryan Schumaker | ddda8e0 | 2012-07-30 16:05:23 -0400 | [diff] [blame] | 1658 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
Trond Myklebust | 70ca885 | 2007-09-30 15:21:24 -0400 | [diff] [blame] | 1659 | |
Anna Schumaker | ea96d1e | 2015-04-03 14:35:59 -0400 | [diff] [blame] | 1660 | |
| 1661 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, |
| 1662 | struct nfs_fattr *fattr) |
| 1663 | { |
| 1664 | bool ret1 = true, ret2 = true; |
| 1665 | |
| 1666 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) |
| 1667 | ret1 = (nfsi->fileid == fattr->fileid); |
| 1668 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) |
| 1669 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); |
| 1670 | return ret1 || ret2; |
| 1671 | } |
| 1672 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1673 | /* |
| 1674 | * Many nfs protocol calls return the new file attributes after |
| 1675 | * an operation. Here we update the inode to reflect the state |
| 1676 | * of the server's inode. |
| 1677 | * |
| 1678 | * This is a bit tricky because we have to make sure all dirty pages |
| 1679 | * have been sent off to the server before calling invalidate_inode_pages. |
| 1680 | * To make sure no other process adds more write requests while we try |
| 1681 | * our best to flush them, we make them sleep during the attribute refresh. |
| 1682 | * |
| 1683 | * A very similar scenario holds for the dir cache. |
| 1684 | */ |
Trond Myklebust | 24aa1fe | 2005-12-03 15:20:07 -0500 | [diff] [blame] | 1685 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | { |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1687 | struct nfs_server *server; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1688 | struct nfs_inode *nfsi = NFS_I(inode); |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1689 | loff_t cur_isize, new_isize; |
Trond Myklebust | 2a3f5fd | 2007-10-08 14:26:13 -0400 | [diff] [blame] | 1690 | unsigned long invalid = 0; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1691 | unsigned long now = jiffies; |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1692 | unsigned long save_cache_validity; |
Trond Myklebust | 651b0e7 | 2016-06-25 17:24:46 -0400 | [diff] [blame] | 1693 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
Benjamin Coddington | 944171c | 2016-07-28 14:41:10 -0400 | [diff] [blame] | 1694 | bool cache_revalidated = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1696 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
Harvey Harrison | 3110ff8 | 2008-05-02 13:42:44 -0700 | [diff] [blame] | 1697 | __func__, inode->i_sb->s_id, inode->i_ino, |
Weston Andros Adamson | 4f1abd2 | 2012-03-06 21:58:20 -0500 | [diff] [blame] | 1698 | nfs_display_fhandle_hash(NFS_FH(inode)), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | atomic_read(&inode->i_count), fattr->valid); |
| 1700 | |
Anna Schumaker | ea96d1e | 2015-04-03 14:35:59 -0400 | [diff] [blame] | 1701 | if (!nfs_fileid_valid(nfsi, fattr)) { |
Matthew Treinish | e73e6c9 | 2012-04-30 11:32:57 -0400 | [diff] [blame] | 1702 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
| 1703 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", |
| 1704 | NFS_SERVER(inode)->nfs_client->cl_hostname, |
| 1705 | inode->i_sb->s_id, (long long)nfsi->fileid, |
| 1706 | (long long)fattr->fileid); |
| 1707 | goto out_err; |
| 1708 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | |
| 1710 | /* |
| 1711 | * Make sure the inode's type hasn't changed. |
| 1712 | */ |
Matthew Treinish | e73e6c9 | 2012-04-30 11:32:57 -0400 | [diff] [blame] | 1713 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
| 1714 | /* |
| 1715 | * Big trouble! The inode has become a different object. |
| 1716 | */ |
Niels de Vos | 1e8968c | 2013-12-17 18:20:16 +0100 | [diff] [blame] | 1717 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
Matthew Treinish | e73e6c9 | 2012-04-30 11:32:57 -0400 | [diff] [blame] | 1718 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
| 1719 | goto out_err; |
| 1720 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1722 | server = NFS_SERVER(inode); |
Trond Myklebust | a035686 | 2007-06-05 13:26:15 -0400 | [diff] [blame] | 1723 | /* Update the fsid? */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1724 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
Trond Myklebust | c37dcd33 | 2008-03-06 12:34:50 -0500 | [diff] [blame] | 1725 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
David Howells | 36d43a4 | 2011-01-14 18:45:42 +0000 | [diff] [blame] | 1726 | !IS_AUTOMOUNT(inode)) |
Trond Myklebust | 8b4bdcf | 2006-06-09 09:34:19 -0400 | [diff] [blame] | 1727 | server->fsid = fattr->fsid; |
| 1728 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | /* |
| 1730 | * Update the read time so we don't revalidate too often. |
| 1731 | */ |
Trond Myklebust | 3380114 | 2005-10-27 22:12:39 -0400 | [diff] [blame] | 1732 | nfsi->read_cache_jiffies = fattr->time_start; |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1733 | |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1734 | save_cache_validity = nfsi->cache_validity; |
| 1735 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR |
| 1736 | | NFS_INO_INVALID_ATIME |
| 1737 | | NFS_INO_REVAL_FORCED |
| 1738 | | NFS_INO_REVAL_PAGECACHE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1739 | |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1740 | /* Do atomic weak cache consistency updates */ |
Trond Myklebust | 27dc1cd | 2011-01-25 15:28:21 -0500 | [diff] [blame] | 1741 | invalid |= nfs_wcc_update_inode(inode, fattr); |
Trond Myklebust | a895b4a | 2006-01-03 09:55:40 +0100 | [diff] [blame] | 1742 | |
Benjamin Coddington | 944171c | 2016-07-28 14:41:10 -0400 | [diff] [blame] | 1743 | if (pnfs_layoutcommit_outstanding(inode)) { |
| 1744 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; |
| 1745 | cache_revalidated = false; |
| 1746 | } |
Trond Myklebust | 10b7e9a | 2016-07-18 00:51:01 -0400 | [diff] [blame] | 1747 | |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1748 | /* More cache consistency checks */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1749 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1750 | if (inode->i_version != fattr->change_attr) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1751 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
| 1752 | inode->i_sb->s_id, inode->i_ino); |
Trond Myklebust | 38512aa98 | 2016-06-07 21:44:08 -0400 | [diff] [blame] | 1753 | /* Could it be a race with writeback? */ |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1754 | if (!have_writers) { |
Trond Myklebust | 38512aa98 | 2016-06-07 21:44:08 -0400 | [diff] [blame] | 1755 | invalid |= NFS_INO_INVALID_ATTR |
| 1756 | | NFS_INO_INVALID_DATA |
| 1757 | | NFS_INO_INVALID_ACCESS |
| 1758 | | NFS_INO_INVALID_ACL; |
| 1759 | if (S_ISDIR(inode->i_mode)) |
| 1760 | nfs_force_lookup_revalidate(inode); |
| 1761 | } |
Trond Myklebust | a9a4a87 | 2011-10-17 16:08:46 -0700 | [diff] [blame] | 1762 | inode->i_version = fattr->change_attr; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1763 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1764 | } else { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1765 | nfsi->cache_validity |= save_cache_validity; |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1766 | cache_revalidated = false; |
| 1767 | } |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1768 | |
| 1769 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { |
Trond Myklebust | fee7fe1 | 2012-04-27 13:48:18 -0400 | [diff] [blame] | 1770 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1771 | } else if (server->caps & NFS_CAP_MTIME) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1772 | nfsi->cache_validity |= save_cache_validity & |
| 1773 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1774 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1775 | cache_revalidated = false; |
| 1776 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1777 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1778 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
Trond Myklebust | fee7fe1 | 2012-04-27 13:48:18 -0400 | [diff] [blame] | 1779 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1780 | } else if (server->caps & NFS_CAP_CTIME) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1781 | nfsi->cache_validity |= save_cache_validity & |
| 1782 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1783 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1784 | cache_revalidated = false; |
| 1785 | } |
Trond Myklebust | 47aabaa | 2007-09-27 15:57:24 -0400 | [diff] [blame] | 1786 | |
Trond Myklebust | 951a143 | 2005-06-22 17:16:30 +0000 | [diff] [blame] | 1787 | /* Check if our cached file size is stale */ |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1788 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
| 1789 | new_isize = nfs_size_to_loff_t(fattr->size); |
| 1790 | cur_isize = i_size_read(inode); |
| 1791 | if (new_isize != cur_isize) { |
| 1792 | /* Do we perhaps have any outstanding writes, or has |
| 1793 | * the file grown beyond our last write? */ |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1794 | if (nfsi->nrequests == 0 || new_isize > cur_isize) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1795 | i_size_write(inode, new_isize); |
Trond Myklebust | ca0daa2 | 2016-06-08 17:08:28 -0400 | [diff] [blame] | 1796 | if (!have_writers) |
| 1797 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1798 | } |
Harshula Jayasuriya | 60c16ea | 2011-05-23 22:52:11 +1000 | [diff] [blame] | 1799 | dprintk("NFS: isize change on server for file %s/%ld " |
| 1800 | "(%Ld to %Ld)\n", |
| 1801 | inode->i_sb->s_id, |
| 1802 | inode->i_ino, |
| 1803 | (long long)cur_isize, |
| 1804 | (long long)new_isize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1806 | } else { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1807 | nfsi->cache_validity |= save_cache_validity & |
| 1808 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1809 | | NFS_INO_REVAL_PAGECACHE |
| 1810 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1811 | cache_revalidated = false; |
| 1812 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1814 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1815 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
| 1816 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1817 | else if (server->caps & NFS_CAP_ATIME) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1818 | nfsi->cache_validity |= save_cache_validity & |
| 1819 | (NFS_INO_INVALID_ATIME |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1820 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1821 | cache_revalidated = false; |
| 1822 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1824 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
| 1825 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { |
Trond Myklebust | 9b4b351 | 2010-02-03 08:27:35 -0500 | [diff] [blame] | 1826 | umode_t newmode = inode->i_mode & S_IFMT; |
| 1827 | newmode |= fattr->mode & S_IALLUGO; |
| 1828 | inode->i_mode = newmode; |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1829 | 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] | 1830 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1831 | } else if (server->caps & NFS_CAP_MODE) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1832 | nfsi->cache_validity |= save_cache_validity & |
| 1833 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1834 | | NFS_INO_INVALID_ACCESS |
| 1835 | | NFS_INO_INVALID_ACL |
| 1836 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1837 | cache_revalidated = false; |
| 1838 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1839 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1840 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1841 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1842 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1843 | inode->i_uid = fattr->uid; |
| 1844 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1845 | } else if (server->caps & NFS_CAP_OWNER) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1846 | nfsi->cache_validity |= save_cache_validity & |
| 1847 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1848 | | NFS_INO_INVALID_ACCESS |
| 1849 | | NFS_INO_INVALID_ACL |
| 1850 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1851 | cache_revalidated = false; |
| 1852 | } |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1853 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1854 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
Eric W. Biederman | 9ff593c | 2013-02-01 14:26:23 -0800 | [diff] [blame] | 1855 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1856 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
| 1857 | inode->i_gid = fattr->gid; |
| 1858 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1859 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1860 | nfsi->cache_validity |= save_cache_validity & |
| 1861 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1862 | | NFS_INO_INVALID_ACCESS |
| 1863 | | NFS_INO_INVALID_ACL |
| 1864 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1865 | cache_revalidated = false; |
| 1866 | } |
Trond Myklebust | 921615f | 2008-10-14 19:23:07 -0400 | [diff] [blame] | 1867 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1868 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
| 1869 | if (inode->i_nlink != fattr->nlink) { |
| 1870 | invalid |= NFS_INO_INVALID_ATTR; |
| 1871 | if (S_ISDIR(inode->i_mode)) |
| 1872 | invalid |= NFS_INO_INVALID_DATA; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1873 | set_nlink(inode, fattr->nlink); |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1874 | } |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1875 | } else if (server->caps & NFS_CAP_NLINK) { |
Trond Myklebust | 43b6535 | 2014-04-15 10:07:57 -0400 | [diff] [blame] | 1876 | nfsi->cache_validity |= save_cache_validity & |
| 1877 | (NFS_INO_INVALID_ATTR |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1878 | | NFS_INO_REVAL_FORCED); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1879 | cache_revalidated = false; |
| 1880 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1881 | |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1882 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1883 | /* |
| 1884 | * report the blocks in 512byte units |
| 1885 | */ |
| 1886 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1887 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
Trond Myklebust | 9e6e70f | 2009-03-11 14:10:24 -0400 | [diff] [blame] | 1888 | inode->i_blocks = fattr->du.nfs2.blocks; |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1889 | else |
| 1890 | cache_revalidated = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1891 | |
| 1892 | /* Update attrtimeo value if we're out of the unstable period */ |
Trond Myklebust | fd1defc | 2014-02-06 14:38:53 -0500 | [diff] [blame] | 1893 | if (invalid & NFS_INO_INVALID_ATTR) { |
Chuck Lever | 91d5b47 | 2006-03-20 13:44:14 -0500 | [diff] [blame] | 1894 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
Trond Myklebust | 3e7d950 | 2007-02-05 14:26:28 -0800 | [diff] [blame] | 1896 | nfsi->attrtimeo_timestamp = now; |
Trond Myklebust | f506200 | 2015-02-26 19:34:32 -0500 | [diff] [blame] | 1897 | /* Set barrier to be more recent than all outstanding updates */ |
Trond Myklebust | 4704f0e | 2008-10-14 19:16:07 -0400 | [diff] [blame] | 1898 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1899 | } else { |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1900 | if (cache_revalidated) { |
| 1901 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, |
| 1902 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { |
| 1903 | nfsi->attrtimeo <<= 1; |
| 1904 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) |
| 1905 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); |
| 1906 | } |
Trond Myklebust | 6d2b296 | 2007-10-01 18:57:50 -0400 | [diff] [blame] | 1907 | nfsi->attrtimeo_timestamp = now; |
| 1908 | } |
Trond Myklebust | f506200 | 2015-02-26 19:34:32 -0500 | [diff] [blame] | 1909 | /* Set the barrier to be more recent than this fattr */ |
| 1910 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) |
| 1911 | nfsi->attr_gencount = fattr->gencount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | } |
Jeff Layton | c812012 | 2015-11-25 13:50:11 -0500 | [diff] [blame] | 1913 | |
| 1914 | /* Don't declare attrcache up to date if there were no attrs! */ |
Trond Myklebust | ade14a7 | 2015-12-29 18:55:19 -0500 | [diff] [blame] | 1915 | if (cache_revalidated) |
Jeff Layton | c812012 | 2015-11-25 13:50:11 -0500 | [diff] [blame] | 1916 | invalid &= ~NFS_INO_INVALID_ATTR; |
| 1917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | /* Don't invalidate the data if we were to blame */ |
| 1919 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) |
| 1920 | || S_ISLNK(inode->i_mode))) |
| 1921 | invalid &= ~NFS_INO_INVALID_DATA; |
Bryan Schumaker | 011e2a7 | 2012-06-20 15:53:43 -0400 | [diff] [blame] | 1922 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
Trond Myklebust | 62ab460 | 2009-08-09 15:06:19 -0400 | [diff] [blame] | 1923 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
Trond Myklebust | 6edf960 | 2014-06-20 13:11:01 -0400 | [diff] [blame] | 1924 | nfs_set_cache_invalid(inode, invalid); |
David Howells | de242c0 | 2012-12-20 21:52:38 +0000 | [diff] [blame] | 1925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | return 0; |
Trond Myklebust | b37b03b | 2005-11-25 17:10:06 -0500 | [diff] [blame] | 1927 | out_err: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | /* |
| 1929 | * No need to worry about unhashing the dentry, as the |
| 1930 | * lookup validation will know that the inode is bad. |
| 1931 | * (But we fall through to invalidate the caches.) |
| 1932 | */ |
| 1933 | nfs_invalidate_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | return -ESTALE; |
| 1935 | } |
| 1936 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1937 | struct inode *nfs_alloc_inode(struct super_block *sb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | { |
| 1939 | struct nfs_inode *nfsi; |
Firo Yang | c456aac | 2015-04-23 17:17:51 +0800 | [diff] [blame] | 1940 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | if (!nfsi) |
| 1942 | return NULL; |
Chuck Lever | 5529680 | 2005-08-18 11:24:09 -0700 | [diff] [blame] | 1943 | nfsi->flags = 0UL; |
| 1944 | nfsi->cache_validity = 0UL; |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1945 | #if IS_ENABLED(CONFIG_NFS_V4) |
J. Bruce Fields | e50a1c2 | 2005-06-22 17:16:23 +0000 | [diff] [blame] | 1946 | nfsi->nfs4_acl = NULL; |
| 1947 | #endif /* CONFIG_NFS_V4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1948 | return &nfsi->vfs_inode; |
| 1949 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1950 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1951 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1952 | static void nfs_i_callback(struct rcu_head *head) |
| 1953 | { |
| 1954 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1955 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
| 1956 | } |
| 1957 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1958 | void nfs_destroy_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 1960 | call_rcu(&inode->i_rcu, nfs_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1961 | } |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1962 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1963 | |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1964 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
| 1965 | { |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 1966 | #if IS_ENABLED(CONFIG_NFS_V4) |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1967 | INIT_LIST_HEAD(&nfsi->open_states); |
| 1968 | nfsi->delegation = NULL; |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1969 | init_rwsem(&nfsi->rwsem); |
Benny Halevy | e5e9401 | 2010-10-20 00:18:01 -0400 | [diff] [blame] | 1970 | nfsi->layout = NULL; |
Andrew Morton | d75d541 | 2006-06-25 02:41:26 -0700 | [diff] [blame] | 1971 | #endif |
| 1972 | } |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1973 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 1974 | static void init_once(void *foo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1975 | { |
| 1976 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; |
| 1977 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1978 | inode_init_once(&nfsi->vfs_inode); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1979 | INIT_LIST_HEAD(&nfsi->open_files); |
| 1980 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); |
| 1981 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1982 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
Weston Andros Adamson | cb1410c | 2014-11-12 12:08:00 -0500 | [diff] [blame] | 1983 | nfsi->nrequests = 0; |
Fred Isaman | ea2cf22 | 2012-04-20 14:47:53 -0400 | [diff] [blame] | 1984 | nfsi->commit_info.ncommit = 0; |
Trond Myklebust | 1a0de48 | 2012-06-19 18:38:56 -0400 | [diff] [blame] | 1985 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
Al Viro | 884be17 | 2016-04-28 23:56:31 -0400 | [diff] [blame] | 1986 | init_rwsem(&nfsi->rmdir_sem); |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 1987 | nfs4_init_once(nfsi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1988 | } |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1989 | |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 1990 | static int __init nfs_init_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | { |
| 1992 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", |
| 1993 | sizeof(struct nfs_inode), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1994 | 0, (SLAB_RECLAIM_ACCOUNT| |
Vladimir Davydov | 5d09705 | 2016-01-14 15:18:21 -0800 | [diff] [blame] | 1995 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 1996 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | if (nfs_inode_cachep == NULL) |
| 1998 | return -ENOMEM; |
| 1999 | |
| 2000 | return 0; |
| 2001 | } |
| 2002 | |
David Brownell | 266bee8 | 2006-06-27 12:59:15 -0700 | [diff] [blame] | 2003 | static void nfs_destroy_inodecache(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 2005 | /* |
| 2006 | * Make sure all delayed rcu free inodes are flushed before we |
| 2007 | * destroy cache. |
| 2008 | */ |
| 2009 | rcu_barrier(); |
Alexey Dobriyan | 1a1d92c | 2006-09-27 01:49:40 -0700 | [diff] [blame] | 2010 | kmem_cache_destroy(nfs_inode_cachep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2011 | } |
| 2012 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2013 | struct workqueue_struct *nfsiod_workqueue; |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2014 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2015 | |
| 2016 | /* |
| 2017 | * start up the nfsiod workqueue |
| 2018 | */ |
| 2019 | static int nfsiod_start(void) |
| 2020 | { |
| 2021 | struct workqueue_struct *wq; |
| 2022 | dprintk("RPC: creating workqueue nfsiod\n"); |
Tejun Heo | ada609e | 2011-01-25 14:35:54 +0100 | [diff] [blame] | 2023 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2024 | if (wq == NULL) |
| 2025 | return -ENOMEM; |
| 2026 | nfsiod_workqueue = wq; |
| 2027 | return 0; |
| 2028 | } |
| 2029 | |
| 2030 | /* |
| 2031 | * Destroy the nfsiod workqueue |
| 2032 | */ |
| 2033 | static void nfsiod_stop(void) |
| 2034 | { |
| 2035 | struct workqueue_struct *wq; |
| 2036 | |
| 2037 | wq = nfsiod_workqueue; |
| 2038 | if (wq == NULL) |
| 2039 | return; |
| 2040 | nfsiod_workqueue = NULL; |
| 2041 | destroy_workqueue(wq); |
| 2042 | } |
| 2043 | |
Alexey Dobriyan | c7d03a0 | 2016-11-17 04:58:21 +0300 | [diff] [blame] | 2044 | unsigned int nfs_net_id; |
Stanislav Kinsbursky | 9e2e74d | 2012-01-10 17:04:24 +0400 | [diff] [blame] | 2045 | EXPORT_SYMBOL_GPL(nfs_net_id); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 2046 | |
| 2047 | static int nfs_net_init(struct net *net) |
| 2048 | { |
Stanislav Kinsbursky | 6b13168 | 2012-01-23 17:26:05 +0000 | [diff] [blame] | 2049 | nfs_clients_init(net); |
Eric W. Biederman | 65b3885 | 2014-07-31 04:35:20 -0700 | [diff] [blame] | 2050 | return nfs_fs_proc_net_init(net); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 2051 | } |
| 2052 | |
| 2053 | static void nfs_net_exit(struct net *net) |
| 2054 | { |
Eric W. Biederman | 65b3885 | 2014-07-31 04:35:20 -0700 | [diff] [blame] | 2055 | nfs_fs_proc_net_exit(net); |
Stanislav Kinsbursky | 28cd1b3 | 2012-01-23 17:26:22 +0000 | [diff] [blame] | 2056 | nfs_cleanup_cb_ident_idr(net); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 2057 | } |
| 2058 | |
| 2059 | static struct pernet_operations nfs_net_ops = { |
| 2060 | .init = nfs_net_init, |
| 2061 | .exit = nfs_net_exit, |
| 2062 | .id = &nfs_net_id, |
| 2063 | .size = sizeof(struct nfs_net), |
| 2064 | }; |
| 2065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2066 | /* |
| 2067 | * Initialize NFS |
| 2068 | */ |
| 2069 | static int __init init_nfs_fs(void) |
| 2070 | { |
| 2071 | int err; |
| 2072 | |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 2073 | err = register_pernet_subsys(&nfs_net_ops); |
| 2074 | if (err < 0) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2075 | goto out9; |
Trond Myklebust | e571cbf | 2009-08-19 18:12:27 -0400 | [diff] [blame] | 2076 | |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 2077 | err = nfs_fscache_register(); |
| 2078 | if (err < 0) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2079 | goto out8; |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 2080 | |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2081 | err = nfsiod_start(); |
| 2082 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2083 | goto out7; |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2084 | |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2085 | err = nfs_fs_proc_init(); |
| 2086 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2087 | goto out6; |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2088 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2089 | err = nfs_init_nfspagecache(); |
| 2090 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2091 | goto out5; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2092 | |
| 2093 | err = nfs_init_inodecache(); |
| 2094 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2095 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2096 | |
| 2097 | err = nfs_init_readpagecache(); |
| 2098 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2099 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2100 | |
| 2101 | err = nfs_init_writepagecache(); |
| 2102 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2103 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2105 | err = nfs_init_directcache(); |
| 2106 | if (err) |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2107 | goto out1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 2109 | rpc_proc_register(&init_net, &nfs_rpcstat); |
Kinglong Mee | cd738ee | 2015-07-01 11:58:31 +0800 | [diff] [blame] | 2110 | |
| 2111 | err = register_nfs_fs(); |
| 2112 | if (err) |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2113 | goto out0; |
| 2114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2115 | return 0; |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2116 | out0: |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 2117 | rpc_proc_unregister(&init_net, "nfs"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | nfs_destroy_directcache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2119 | out1: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2120 | nfs_destroy_writepagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2121 | out2: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2122 | nfs_destroy_readpagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2123 | out3: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2124 | nfs_destroy_inodecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2125 | out4: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2126 | nfs_destroy_nfspagecache(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2127 | out5: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2128 | nfs_fs_proc_exit(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2129 | out6: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2130 | nfsiod_stop(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2131 | out7: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2132 | nfs_fscache_unregister(); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2133 | out8: |
Bryan Schumaker | 129d197 | 2012-07-16 16:39:13 -0400 | [diff] [blame] | 2134 | unregister_pernet_subsys(&nfs_net_ops); |
Bryan Schumaker | 89d77c8 | 2012-07-30 16:05:25 -0400 | [diff] [blame] | 2135 | out9: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2136 | return err; |
| 2137 | } |
| 2138 | |
| 2139 | static void __exit exit_nfs_fs(void) |
| 2140 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2141 | nfs_destroy_directcache(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | nfs_destroy_writepagecache(); |
| 2143 | nfs_destroy_readpagecache(); |
| 2144 | nfs_destroy_inodecache(); |
| 2145 | nfs_destroy_nfspagecache(); |
David Howells | 8ec442a | 2009-04-03 16:42:42 +0100 | [diff] [blame] | 2146 | nfs_fscache_unregister(); |
Stanislav Kinsbursky | 1b340d0 | 2011-11-25 17:13:04 +0300 | [diff] [blame] | 2147 | unregister_pernet_subsys(&nfs_net_ops); |
Stanislav Kinsbursky | ec7652a | 2011-12-06 16:42:40 +0300 | [diff] [blame] | 2148 | rpc_proc_unregister(&init_net, "nfs"); |
David Howells | f7b422b | 2006-06-09 09:34:33 -0400 | [diff] [blame] | 2149 | unregister_nfs_fs(); |
David Howells | 6aaca56 | 2006-08-22 20:06:13 -0400 | [diff] [blame] | 2150 | nfs_fs_proc_exit(); |
Trond Myklebust | 5746006 | 2008-02-19 20:04:22 -0500 | [diff] [blame] | 2151 | nfsiod_stop(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2152 | } |
| 2153 | |
| 2154 | /* Not quite true; I just maintain it */ |
| 2155 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); |
| 2156 | MODULE_LICENSE("GPL"); |
Trond Myklebust | f43bf0b | 2007-10-09 12:01:04 -0400 | [diff] [blame] | 2157 | module_param(enable_ino64, bool, 0644); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | |
| 2159 | module_init(init_nfs_fs) |
| 2160 | module_exit(exit_nfs_fs) |