diff options
| -rw-r--r-- | fs/9p/v9fs.h | 4 | ||||
| -rw-r--r-- | fs/9p/v9fs_vfs.h | 10 | ||||
| -rw-r--r-- | fs/9p/vfs_dentry.c | 34 | ||||
| -rw-r--r-- | fs/9p/vfs_inode.c | 29 | ||||
| -rw-r--r-- | fs/9p/vfs_inode_dotl.c | 27 |
5 files changed, 104 insertions, 0 deletions
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index 71cab8e..cfdc055 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -116,12 +116,16 @@ struct v9fs_session_info { struct p9_fid *root_fid; /* Used for file system sync */ }; +/* cache_validity flags */ +#define V9FS_INO_INVALID_ATTR 0x01 + struct v9fs_inode { #ifdef CONFIG_9P_FSCACHE spinlock_t fscache_lock; struct fscache_cookie *fscache; struct p9_qid *fscache_key; #endif + unsigned int cache_validity; struct p9_fid *writeback_fid; struct inode vfs_inode; }; diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h index ed9fd00..591807f 100644 --- a/fs/9p/v9fs_vfs.h +++ b/fs/9p/v9fs_vfs.h @@ -70,4 +70,14 @@ int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *); int v9fs_file_fsync_dotl(struct file *filp, int datasync); ssize_t v9fs_file_write_internal(struct inode *, struct p9_fid *, const char __user *, size_t, loff_t *, int); +int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode); +int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode); +static inline void v9fs_invalidate_inode_attr(struct inode *inode) +{ + struct v9fs_inode *v9inode; + v9inode = V9FS_I(inode); + v9inode->cache_validity |= V9FS_INO_INVALID_ATTR; + return; +} + #define P9_LOCK_TIMEOUT (30*HZ) diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c index a4ae4be..b6a3b9f 100644 --- a/fs/9p/vfs_dentry.c +++ b/fs/9p/vfs_dentry.c @@ -100,7 +100,41 @@ static void v9fs_dentry_release(struct dentry *dentry) } } +static int v9fs_lookup_revalidate(struct dentry *dentry, struct nameidata *nd) +{ + struct p9_fid *fid; + struct inode *inode; + struct v9fs_inode *v9inode; + + if (nd->flags & LOOKUP_RCU) + return -ECHILD; + + inode = dentry->d_inode; + if (!inode) + goto out_valid; + + v9inode = V9FS_I(inode); + if (v9inode->cache_validity & V9FS_INO_INVALID_ATTR) { + int retval; + struct v9fs_session_info *v9ses; + fid = v9fs_fid_lookup(dentry); + if (IS_ERR(fid)) + return PTR_ERR(fid); + + v9ses = v9fs_inode2v9ses(inode); + if (v9fs_proto_dotl(v9ses)) + retval = v9fs_refresh_inode_dotl(fid, inode); + else + retval = v9fs_refresh_inode(fid, inode); + if (retval <= 0) + return retval; + } +out_valid: + return 1; +} + const struct dentry_operations v9fs_cached_dentry_operations = { + .d_revalidate = v9fs_lookup_revalidate, .d_delete = v9fs_cached_dentry_delete, .d_release = v9fs_dentry_release, }; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 334ad12..a28fe9f 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -220,6 +220,7 @@ struct inode *v9fs_alloc_inode(struct super_block *sb) spin_lock_init(&v9inode->fscache_lock); #endif v9inode->writeback_fid = NULL; + v9inode->cache_validity = 0; return &v9inode->vfs_inode; } @@ -1010,6 +1011,7 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, char tag_name[14]; unsigned int i_nlink; struct v9fs_session_info *v9ses = sb->s_fs_info; + struct v9fs_inode *v9inode = V9FS_I(inode); inode->i_nlink = 1; @@ -1069,6 +1071,7 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode, /* not real number of blocks, but 512 byte ones ... */ inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9; + v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; } /** @@ -1323,6 +1326,32 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev) return retval; } +int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode) +{ + loff_t i_size; + struct p9_wstat *st; + struct v9fs_session_info *v9ses; + + v9ses = v9fs_inode2v9ses(inode); + st = p9_client_stat(fid); + if (IS_ERR(st)) + return PTR_ERR(st); + + spin_lock(&inode->i_lock); + /* + * We don't want to refresh inode->i_size, + * because we may have cached data + */ + i_size = inode->i_size; + v9fs_stat2inode(st, inode, inode->i_sb); + if (v9ses->cache) + inode->i_size = i_size; + spin_unlock(&inode->i_lock); + p9stat_free(st); + kfree(st); + return 0; +} + static const struct inode_operations v9fs_dir_inode_operations_dotu = { .create = v9fs_vfs_create, .lookup = v9fs_vfs_lookup, diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c index c6d9677..5c04d66 100644 --- a/fs/9p/vfs_inode_dotl.c +++ b/fs/9p/vfs_inode_dotl.c @@ -484,6 +484,7 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr) void v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) { + struct v9fs_inode *v9inode = V9FS_I(inode); if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) { inode->i_atime.tv_sec = stat->st_atime_sec; @@ -542,6 +543,7 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode) /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION * because the inode structure does not have fields for them. */ + v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR; } static int @@ -822,6 +824,31 @@ ndset: return NULL; } +int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode) +{ + loff_t i_size; + struct p9_stat_dotl *st; + struct v9fs_session_info *v9ses; + + v9ses = v9fs_inode2v9ses(inode); + st = p9_client_getattr_dotl(fid, P9_STATS_ALL); + if (IS_ERR(st)) + return PTR_ERR(st); + + spin_lock(&inode->i_lock); + /* + * We don't want to refresh inode->i_size, + * because we may have cached data + */ + i_size = inode->i_size; + v9fs_stat2inode_dotl(st, inode); + if (v9ses->cache) + inode->i_size = i_size; + spin_unlock(&inode->i_lock); + kfree(st); + return 0; +} + const struct inode_operations v9fs_dir_inode_operations_dotl = { .create = v9fs_vfs_create_dotl, .lookup = v9fs_vfs_lookup, |
