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| author | Andrew Gallagher <andrewjcg@fb.com> | 2013-11-05 03:55:43 -0800 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2014-01-22 19:36:58 +0100 |
| commit | 451418fc928b5ec1ee96a9afac807b6312811a2a (patch) | |
| tree | 447f2e957ae82c8e3701bd7f9b127aef564bd4a2 /fs/fuse | |
| parent | 063ec1e595f8a82b5a8fd0acb3e88c8b49a1e6c1 (diff) | |
| download | linux-451418fc928b5ec1ee96a9afac807b6312811a2a.tar.gz linux-451418fc928b5ec1ee96a9afac807b6312811a2a.tar.bz2 linux-451418fc928b5ec1ee96a9afac807b6312811a2a.zip | |
fuse: don't invalidate attrs when not using atime
Various read operations (e.g. readlink, readdir) invalidate the cached
attrs for atime changes. This patch adds a new function
'fuse_invalidate_atime', which checks for a read-only super block and
avoids the attr invalidation in that case.
Signed-off-by: Andrew Gallagher <andrewjcg@fb.com>
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'fs/fuse')
| -rw-r--r-- | fs/fuse/dir.c | 14 | ||||
| -rw-r--r-- | fs/fuse/file.c | 4 | ||||
| -rw-r--r-- | fs/fuse/fuse_i.h | 2 |
3 files changed, 16 insertions, 4 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index c3eb2c46c8f1..1d1292c581c3 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -112,6 +112,16 @@ void fuse_invalidate_attr(struct inode *inode) get_fuse_inode(inode)->i_time = 0; } +/** + * Mark the attributes as stale due to an atime change. Avoid the invalidate if + * atime is not used. + */ +void fuse_invalidate_atime(struct inode *inode) +{ + if (!IS_RDONLY(inode)) + fuse_invalidate_attr(inode); +} + /* * Just mark the entry as stale, so that a next attempt to look it up * will result in a new lookup call to userspace @@ -1371,7 +1381,7 @@ static int fuse_readdir(struct file *file, struct dir_context *ctx) } __free_page(page); - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); return err; } @@ -1404,7 +1414,7 @@ static char *read_link(struct dentry *dentry) link[req->out.args[0].size] = '\0'; out: fuse_put_request(fc, req); - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); return link; } diff --git a/fs/fuse/file.c b/fs/fuse/file.c index 7e70506297bc..d53af8f15236 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -687,7 +687,7 @@ static int fuse_readpage(struct file *file, struct page *page) SetPageUptodate(page); } - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); out: unlock_page(page); return err; @@ -716,7 +716,7 @@ static void fuse_readpages_end(struct fuse_conn *fc, struct fuse_req *req) fuse_read_update_size(inode, pos, req->misc.read.attr_ver); } - fuse_invalidate_attr(inode); /* atime changed */ + fuse_invalidate_atime(inode); } for (i = 0; i < req->num_pages; i++) { diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 7d2730912667..dc44b9e3a0c9 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -788,6 +788,8 @@ void fuse_invalidate_attr(struct inode *inode); void fuse_invalidate_entry_cache(struct dentry *entry); +void fuse_invalidate_atime(struct inode *inode); + /** * Acquire reference to fuse_conn */ |