diff options
| -rw-r--r-- | fs/cifs/cache.c | 83 | ||||
| -rw-r--r-- | fs/cifs/cifsfs.c | 7 | ||||
| -rw-r--r-- | fs/cifs/cifsglob.h | 3 | ||||
| -rw-r--r-- | fs/cifs/file.c | 6 | ||||
| -rw-r--r-- | fs/cifs/fscache.c | 68 | ||||
| -rw-r--r-- | fs/cifs/fscache.h | 12 | ||||
| -rw-r--r-- | fs/cifs/inode.c | 4 |
7 files changed, 183 insertions, 0 deletions
diff --git a/fs/cifs/cache.c b/fs/cifs/cache.c index 15532abdac14..b2649cfd3a04 100644 --- a/fs/cifs/cache.c +++ b/fs/cifs/cache.c @@ -215,3 +215,86 @@ const struct fscache_cookie_def cifs_fscache_super_index_def = { .check_aux = cifs_fscache_super_check_aux, }; +/* + * Auxiliary data attached to CIFS inode within the cache + */ +struct cifs_fscache_inode_auxdata { + struct timespec last_write_time; + struct timespec last_change_time; + u64 eof; +}; + +static uint16_t cifs_fscache_inode_get_key(const void *cookie_netfs_data, + void *buffer, uint16_t maxbuf) +{ + const struct cifsInodeInfo *cifsi = cookie_netfs_data; + uint16_t keylen; + + /* use the UniqueId as the key */ + keylen = sizeof(cifsi->uniqueid); + if (keylen > maxbuf) + keylen = 0; + else + memcpy(buffer, &cifsi->uniqueid, keylen); + + return keylen; +} + +static void +cifs_fscache_inode_get_attr(const void *cookie_netfs_data, uint64_t *size) +{ + const struct cifsInodeInfo *cifsi = cookie_netfs_data; + + *size = cifsi->vfs_inode.i_size; +} + +static uint16_t +cifs_fscache_inode_get_aux(const void *cookie_netfs_data, void *buffer, + uint16_t maxbuf) +{ + struct cifs_fscache_inode_auxdata auxdata; + const struct cifsInodeInfo *cifsi = cookie_netfs_data; + + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.eof = cifsi->server_eof; + auxdata.last_write_time = cifsi->vfs_inode.i_mtime; + auxdata.last_change_time = cifsi->vfs_inode.i_ctime; + + if (maxbuf > sizeof(auxdata)) + maxbuf = sizeof(auxdata); + + memcpy(buffer, &auxdata, maxbuf); + + return maxbuf; +} + +static enum +fscache_checkaux cifs_fscache_inode_check_aux(void *cookie_netfs_data, + const void *data, + uint16_t datalen) +{ + struct cifs_fscache_inode_auxdata auxdata; + struct cifsInodeInfo *cifsi = cookie_netfs_data; + + if (datalen != sizeof(auxdata)) + return FSCACHE_CHECKAUX_OBSOLETE; + + memset(&auxdata, 0, sizeof(auxdata)); + auxdata.eof = cifsi->server_eof; + auxdata.last_write_time = cifsi->vfs_inode.i_mtime; + auxdata.last_change_time = cifsi->vfs_inode.i_ctime; + + if (memcmp(data, &auxdata, datalen) != 0) + return FSCACHE_CHECKAUX_OBSOLETE; + + return FSCACHE_CHECKAUX_OKAY; +} + +const struct fscache_cookie_def cifs_fscache_inode_object_def = { + .name = "CIFS.uniqueid", + .type = FSCACHE_COOKIE_TYPE_DATAFILE, + .get_key = cifs_fscache_inode_get_key, + .get_attr = cifs_fscache_inode_get_attr, + .get_aux = cifs_fscache_inode_get_aux, + .check_aux = cifs_fscache_inode_check_aux, +}; diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c index 24d7f4ab3b65..8a2cf129e535 100644 --- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -330,6 +330,12 @@ cifs_destroy_inode(struct inode *inode) } static void +cifs_clear_inode(struct inode *inode) +{ + cifs_fscache_release_inode_cookie(inode); +} + +static void cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) { seq_printf(s, ",addr="); @@ -490,6 +496,7 @@ static const struct super_operations cifs_super_ops = { .alloc_inode = cifs_alloc_inode, .destroy_inode = cifs_destroy_inode, .drop_inode = cifs_drop_inode, + .clear_inode = cifs_clear_inode, /* .delete_inode = cifs_delete_inode, */ /* Do not need above function unless later we add lazy close of inodes or unless the kernel forgets to call us with the same number of releases (closes) diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index a3e403e7e163..9b7cf9aa3a00 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -390,6 +390,9 @@ struct cifsInodeInfo { bool invalid_mapping:1; /* pagecache is invalid */ u64 server_eof; /* current file size on server */ u64 uniqueid; /* server inode number */ +#ifdef CONFIG_CIFS_FSCACHE + struct fscache_cookie *fscache; +#endif struct inode vfs_inode; }; diff --git a/fs/cifs/file.c b/fs/cifs/file.c index b5fb2a0607b0..d302d941f9ac 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -40,6 +40,7 @@ #include "cifs_unicode.h" #include "cifs_debug.h" #include "cifs_fs_sb.h" +#include "fscache.h" static inline int cifs_convert_flags(unsigned int flags) { @@ -282,6 +283,9 @@ int cifs_open(struct inode *inode, struct file *file) CIFSSMBClose(xid, tcon, netfid); rc = -ENOMEM; } + + cifs_fscache_set_inode_cookie(inode, file); + goto out; } else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { if (tcon->ses->serverNOS) @@ -373,6 +377,8 @@ int cifs_open(struct inode *inode, struct file *file) goto out; } + cifs_fscache_set_inode_cookie(inode, file); + if (oplock & CIFS_CREATE_ACTION) { /* time to set mode which we can not set earlier due to problems creating new read-only files */ diff --git a/fs/cifs/fscache.c b/fs/cifs/fscache.c index eba9beb94a4c..6c8d96758ddb 100644 --- a/fs/cifs/fscache.c +++ b/fs/cifs/fscache.c @@ -21,6 +21,7 @@ #include "fscache.h" #include "cifsglob.h" #include "cifs_debug.h" +#include "cifs_fs_sb.h" void cifs_fscache_get_client_cookie(struct TCP_Server_Info *server) { @@ -56,3 +57,70 @@ void cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) fscache_relinquish_cookie(tcon->fscache, 0); tcon->fscache = NULL; } + +static void cifs_fscache_enable_inode_cookie(struct inode *inode) +{ + struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + + if (cifsi->fscache) + return; + + cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache, + &cifs_fscache_inode_object_def, + cifsi); + cFYI(1, "CIFS: got FH cookie (0x%p/0x%p)", + cifs_sb->tcon->fscache, cifsi->fscache); +} + +void cifs_fscache_release_inode_cookie(struct inode *inode) +{ + struct cifsInodeInfo *cifsi = CIFS_I(inode); + + if (cifsi->fscache) { + cFYI(1, "CIFS releasing inode cookie (0x%p)", + cifsi->fscache); + fscache_relinquish_cookie(cifsi->fscache, 0); + cifsi->fscache = NULL; + } +} + +static void cifs_fscache_disable_inode_cookie(struct inode *inode) +{ + struct cifsInodeInfo *cifsi = CIFS_I(inode); + + if (cifsi->fscache) { + cFYI(1, "CIFS disabling inode cookie (0x%p)", + cifsi->fscache); + fscache_relinquish_cookie(cifsi->fscache, 1); + cifsi->fscache = NULL; + } +} + +void cifs_fscache_set_inode_cookie(struct inode *inode, struct file *filp) +{ + if ((filp->f_flags & O_ACCMODE) != O_RDONLY) + cifs_fscache_disable_inode_cookie(inode); + else { + cifs_fscache_enable_inode_cookie(inode); + cFYI(1, "CIFS: fscache inode cookie set"); + } +} + +void cifs_fscache_reset_inode_cookie(struct inode *inode) +{ + struct cifsInodeInfo *cifsi = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct fscache_cookie *old = cifsi->fscache; + + if (cifsi->fscache) { + /* retire the current fscache cache and get a new one */ + fscache_relinquish_cookie(cifsi->fscache, 1); + + cifsi->fscache = fscache_acquire_cookie(cifs_sb->tcon->fscache, + &cifs_fscache_inode_object_def, + cifsi); + cFYI(1, "CIFS: new cookie 0x%p oldcookie 0x%p", + cifsi->fscache, old); + } +} diff --git a/fs/cifs/fscache.h b/fs/cifs/fscache.h index d2ba628b72cd..1008f4050835 100644 --- a/fs/cifs/fscache.h +++ b/fs/cifs/fscache.h @@ -30,6 +30,8 @@ extern struct fscache_netfs cifs_fscache_netfs; extern const struct fscache_cookie_def cifs_fscache_server_index_def; extern const struct fscache_cookie_def cifs_fscache_super_index_def; +extern const struct fscache_cookie_def cifs_fscache_inode_object_def; + extern int cifs_fscache_register(void); extern void cifs_fscache_unregister(void); @@ -42,6 +44,10 @@ extern void cifs_fscache_release_client_cookie(struct TCP_Server_Info *); extern void cifs_fscache_get_super_cookie(struct cifsTconInfo *); extern void cifs_fscache_release_super_cookie(struct cifsTconInfo *); +extern void cifs_fscache_release_inode_cookie(struct inode *); +extern void cifs_fscache_set_inode_cookie(struct inode *, struct file *); +extern void cifs_fscache_reset_inode_cookie(struct inode *); + #else /* CONFIG_CIFS_FSCACHE */ static inline int cifs_fscache_register(void) { return 0; } static inline void cifs_fscache_unregister(void) {} @@ -54,6 +60,12 @@ static inline void cifs_fscache_get_super_cookie(struct cifsTconInfo *tcon) {} static inline void cifs_fscache_release_super_cookie(struct cifsTconInfo *tcon) {} +static inline void cifs_fscache_release_inode_cookie(struct inode *inode) {} +static inline void cifs_fscache_set_inode_cookie(struct inode *inode, + struct file *filp) {} +static inline void cifs_fscache_reset_inode_cookie(struct inode *inode) {} + + #endif /* CONFIG_CIFS_FSCACHE */ #endif /* _CIFS_FSCACHE_H */ diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index f884cb51622a..5a68b92a0f9a 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -29,6 +29,7 @@ #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_fs_sb.h" +#include "fscache.h" static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral) @@ -776,6 +777,8 @@ retry_iget5_locked: inode->i_flags |= S_NOATIME | S_NOCMTIME; if (inode->i_state & I_NEW) { inode->i_ino = hash; + /* initialize per-inode cache cookie pointer */ + CIFS_I(inode)->fscache = NULL; unlock_new_inode(inode); } } @@ -1571,6 +1574,7 @@ cifs_invalidate_mapping(struct inode *inode) cifs_i->write_behind_rc = rc; } invalidate_remote_inode(inode); + cifs_fscache_reset_inode_cookie(inode); } int cifs_revalidate_file(struct file *filp) |