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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-09-26 20:36:09 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-09-26 19:16:46 -0700 |
| commit | 815d405ceff0d6964683f033e18b9b23a88fba87 (patch) | |
| tree | 2bec24a44bc3edbdcedf8ae65256a0533ce4e46a | |
| parent | d94c177beeb4469cd4f6e83354ab0223353e98ed (diff) | |
| download | lwn-815d405ceff0d6964683f033e18b9b23a88fba87.tar.gz lwn-815d405ceff0d6964683f033e18b9b23a88fba87.zip | |
VFS: Fix the remaining automounter semantics regressions
The concensus seems to be that system calls such as stat() etc should
not trigger an automount. Neither should the l* versions.
This patch therefore adds a LOOKUP_AUTOMOUNT flag to tag those lookups
that _should_ trigger an automount on the last path element.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[ Edited to leave out the cases that are already covered by LOOKUP_OPEN,
LOOKUP_DIRECTORY and LOOKUP_CREATE - all of which also fundamentally
force automounting for their own reasons - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/namespace.c | 2 | ||||
| -rw-r--r-- | fs/nfs/super.c | 2 | ||||
| -rw-r--r-- | fs/quota/quota.c | 2 |
3 files changed, 3 insertions, 3 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 22bfe8273c68..b4febb29d3bb 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -1757,7 +1757,7 @@ static int do_loopback(struct path *path, char *old_name, return err; if (!old_name || !*old_name) return -EINVAL; - err = kern_path(old_name, LOOKUP_FOLLOW, &old_path); + err = kern_path(old_name, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &old_path); if (err) return err; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 9b7dd7013b15..5b19b6aabe18 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2798,7 +2798,7 @@ static struct dentry *nfs_follow_remote_path(struct vfsmount *root_mnt, goto out_put_mnt_ns; ret = vfs_path_lookup(root_mnt->mnt_root, root_mnt, - export_path, LOOKUP_FOLLOW, &path); + export_path, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); nfs_referral_loop_unprotect(); put_mnt_ns(ns_private); diff --git a/fs/quota/quota.c b/fs/quota/quota.c index b34bdb25490c..10b6be3ca280 100644 --- a/fs/quota/quota.c +++ b/fs/quota/quota.c @@ -355,7 +355,7 @@ SYSCALL_DEFINE4(quotactl, unsigned int, cmd, const char __user *, special, * resolution (think about autofs) and thus deadlocks could arise. */ if (cmds == Q_QUOTAON) { - ret = user_path_at(AT_FDCWD, addr, LOOKUP_FOLLOW, &path); + ret = user_path_at(AT_FDCWD, addr, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); if (ret) pathp = ERR_PTR(ret); else |