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authorLinus Torvalds <torvalds@linux-foundation.org>2016-08-07 16:01:14 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-07 16:01:14 +0200
commitfe64f3283fb315e3d8f2b78785a86904a852ca82 (patch)
tree3ab48823f0ef8b855f9b58809f09b9db2997f12e /fs/9p
parentMerge tag 'xfs-rmap-for-linus-4.8-rc1' of git://git.kernel.org/pub/scm/linux/... (diff)
parentcachefiles: Fix race between inactivating and culling a cache object (diff)
downloadlinux-fe64f3283fb315e3d8f2b78785a86904a852ca82.tar.xz
linux-fe64f3283fb315e3d8f2b78785a86904a852ca82.zip
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more vfs updates from Al Viro: "Assorted cleanups and fixes. In the "trivial API change" department - ->d_compare() losing 'parent' argument" * 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: cachefiles: Fix race between inactivating and culling a cache object 9p: use clone_fid() 9p: fix braino introduced in "9p: new helper - v9fs_parent_fid()" vfs: make dentry_needs_remove_privs() internal vfs: remove file_needs_remove_privs() vfs: fix deadlock in file_remove_privs() on overlayfs get rid of 'parent' argument of ->d_compare() cifs, msdos, vfat, hfs+: don't bother with parent in ->d_compare() affs ->d_compare(): don't bother with ->d_inode fold _d_rehash() and __d_rehash() together fold dentry_rcuwalk_invalidate() into its only remaining caller
Diffstat (limited to 'fs/9p')
-rw-r--r--fs/9p/fid.c26
-rw-r--r--fs/9p/fid.h9
-rw-r--r--fs/9p/vfs_inode.c6
-rw-r--r--fs/9p/vfs_inode_dotl.c2
-rw-r--r--fs/9p/xattr.c4
5 files changed, 14 insertions, 33 deletions
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index 47db55aee7f2..60fb47469c86 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -257,36 +257,12 @@ struct p9_fid *v9fs_fid_lookup(struct dentry *dentry)
return v9fs_fid_lookup_with_uid(dentry, uid, any);
}
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
-{
- struct p9_fid *fid, *ret;
-
- fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return fid;
-
- ret = p9_client_walk(fid, 0, NULL, 1);
- return ret;
-}
-
-static struct p9_fid *v9fs_fid_clone_with_uid(struct dentry *dentry, kuid_t uid)
-{
- struct p9_fid *fid, *ret;
-
- fid = v9fs_fid_lookup_with_uid(dentry, uid, 0);
- if (IS_ERR(fid))
- return fid;
-
- ret = p9_client_walk(fid, 0, NULL, 1);
- return ret;
-}
-
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry)
{
int err;
struct p9_fid *fid;
- fid = v9fs_fid_clone_with_uid(dentry, GLOBAL_ROOT_UID);
+ fid = clone_fid(v9fs_fid_lookup_with_uid(dentry, GLOBAL_ROOT_UID, 0));
if (IS_ERR(fid))
goto error_out;
/*
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 12700df0bb51..4491bcaf42b8 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -28,7 +28,14 @@ static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
{
return v9fs_fid_lookup(dentry->d_parent);
}
-struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
void v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);
struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
+static inline struct p9_fid *clone_fid(struct p9_fid *fid)
+{
+ return IS_ERR(fid) ? fid : p9_client_walk(fid, 0, NULL, 1);
+}
+static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
+{
+ return clone_fid(v9fs_fid_lookup(dentry));
+}
#endif
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 7da9a8354fad..8b1999b528e9 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -661,7 +661,7 @@ v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
}
/* clone a fid to use for creation */
- ofid = p9_client_walk(dfid, 0, NULL, 1);
+ ofid = clone_fid(dfid);
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
@@ -975,13 +975,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (IS_ERR(oldfid))
return PTR_ERR(oldfid);
- olddirfid = v9fs_parent_fid(old_dentry);
+ olddirfid = clone_fid(v9fs_parent_fid(old_dentry));
if (IS_ERR(olddirfid)) {
retval = PTR_ERR(olddirfid);
goto done;
}
- newdirfid = v9fs_parent_fid(new_dentry);
+ newdirfid = clone_fid(v9fs_parent_fid(new_dentry));
if (IS_ERR(newdirfid)) {
retval = PTR_ERR(newdirfid);
goto clunk_olddir;
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 2ed04c2fe7af..eeabcb0bad12 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -281,7 +281,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
}
/* clone a fid to use for creation */
- ofid = p9_client_walk(dfid, 0, NULL, 1);
+ ofid = clone_fid(dfid);
if (IS_ERR(ofid)) {
err = PTR_ERR(ofid);
p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index a6bd349bab23..f329eee6dc93 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -97,8 +97,6 @@ int v9fs_xattr_set(struct dentry *dentry, const char *name,
const void *value, size_t value_len, int flags)
{
struct p9_fid *fid = v9fs_fid_lookup(dentry);
- if (IS_ERR(fid))
- return PTR_ERR(fid);
return v9fs_fid_xattr_set(fid, name, value, value_len, flags);
}
@@ -115,7 +113,7 @@ int v9fs_fid_xattr_set(struct p9_fid *fid, const char *name,
name, value_len, flags);
/* Clone it */
- fid = p9_client_walk(fid, 0, NULL, 1);
+ fid = clone_fid(fid);
if (IS_ERR(fid))
return PTR_ERR(fid);