diff options
| author | Ian Kent <ikent@redhat.com> | 2016-11-24 08:03:41 +1100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-12-02 22:15:53 -0500 |
| commit | fb5f51c7425ebc808d91329257cbc963e2421368 (patch) | |
| tree | 668ce525a98e945beeb49145d30c37c41706450f /fs | |
| parent | e5517c2a5a49ed5e99047008629f1cd60246ea0e (diff) | |
| download | lwn-fb5f51c7425ebc808d91329257cbc963e2421368.tar.gz lwn-fb5f51c7425ebc808d91329257cbc963e2421368.zip | |
vfs: change d_manage() to take a struct path
For the autofs module to be able to reliably check if a dentry is a
mountpoint in a multiple namespace environment the ->d_manage() dentry
operation will need to take a path argument instead of a dentry.
Link: http://lkml.kernel.org/r/20161011053352.27645.83962.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/autofs4/root.c | 5 | ||||
| -rw-r--r-- | fs/namei.c | 13 |
2 files changed, 9 insertions, 9 deletions
diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index a11f73174877..3a4328218b71 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -32,7 +32,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file); static struct dentry *autofs4_lookup(struct inode *, struct dentry *, unsigned int); static struct vfsmount *autofs4_d_automount(struct path *); -static int autofs4_d_manage(struct dentry *, bool); +static int autofs4_d_manage(const struct path *, bool); static void autofs4_dentry_release(struct dentry *); const struct file_operations autofs4_root_operations = { @@ -421,8 +421,9 @@ done: return NULL; } -static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) +static int autofs4_d_manage(const struct path *path, bool rcu_walk) { + struct dentry *dentry = path->dentry; struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); struct autofs_info *ino = autofs4_dentry_ino(dentry); int status; diff --git a/fs/namei.c b/fs/namei.c index 5b4eed221530..81ac4736b596 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1200,7 +1200,7 @@ static int follow_managed(struct path *path, struct nameidata *nd) if (managed & DCACHE_MANAGE_TRANSIT) { BUG_ON(!path->dentry->d_op); BUG_ON(!path->dentry->d_op->d_manage); - ret = path->dentry->d_op->d_manage(path->dentry, false); + ret = path->dentry->d_op->d_manage(path, false); if (ret < 0) break; } @@ -1263,10 +1263,10 @@ int follow_down_one(struct path *path) } EXPORT_SYMBOL(follow_down_one); -static inline int managed_dentry_rcu(struct dentry *dentry) +static inline int managed_dentry_rcu(const struct path *path) { - return (dentry->d_flags & DCACHE_MANAGE_TRANSIT) ? - dentry->d_op->d_manage(dentry, true) : 0; + return (path->dentry->d_flags & DCACHE_MANAGE_TRANSIT) ? + path->dentry->d_op->d_manage(path, true) : 0; } /* @@ -1282,7 +1282,7 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path, * Don't forget we might have a non-mountpoint managed dentry * that wants to block transit. */ - switch (managed_dentry_rcu(path->dentry)) { + switch (managed_dentry_rcu(path)) { case -ECHILD: default: return false; @@ -1392,8 +1392,7 @@ int follow_down(struct path *path) if (managed & DCACHE_MANAGE_TRANSIT) { BUG_ON(!path->dentry->d_op); BUG_ON(!path->dentry->d_op->d_manage); - ret = path->dentry->d_op->d_manage( - path->dentry, false); + ret = path->dentry->d_op->d_manage(path, false); if (ret < 0) return ret == -EISDIR ? 0 : ret; } |