kernel/git/stable/linux.git/fs/namei.c, branch linux-3.5.y

vfs: retry last component if opening stale dentry

2012-06-01T16:12:01+00:00

NFS optimizes away d_revalidates for last component of open. This means that open itself can find the dentry stale. This patch allows the filesystem to return EOPENSTALE and the VFS will retry the lookup on just the last component if possible. If the lookup was done using RCU mode, including the last component, then this is not possible since the parent dentry is lost. In this case fall back to non-RCU lookup. Currently this is not used since NFS will always leave RCU mode. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last() common post lookup

2012-06-01T16:12:00+00:00

Now the post lookup code can be shared between O_CREAT and plain opens since they are essentially the same. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): add audit_inode before open

2012-06-01T16:11:59+00:00

This allows this code to be shared between O_CREAT and plain opens. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): only return EISDIR for O_CREAT

2012-06-01T16:11:59+00:00

This allows this code to be shared between O_CREAT and plain opens. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): check LOOKUP_DIRECTORY

2012-06-01T16:11:58+00:00

Check for ENOTDIR before finishing open. This allows this code to be shared between O_CREAT and plain opens. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): make ENOENT exit RCU safe

2012-06-01T16:11:58+00:00

This will allow this code to be used in RCU mode. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: make follow_link check RCU safe

2012-06-01T16:11:58+00:00

This will allow this code to be used in RCU mode. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): use inode variable

2012-06-01T16:11:57+00:00

Use helper variable instead of path->dentry->d_inode before complete_walk(). This will allow this code to be used in RCU mode. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): inline walk_component()

2012-06-01T16:11:57+00:00

Copy walk_component() into do_lookup(). Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

vfs: do_last(): make exit RCU safe

2012-06-01T16:11:57+00:00

Allow returning from do_last() with LOOKUP_RCU still set on the "out:" and "exit:" labels. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro