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fs: provide rcu-walk aware permission i_ops

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Signed-off-by: Nick Piggin <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:49:58 +11:00
commit b74c79e993
60 changed files with 287 additions and 146 deletions
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10
fs/fuse/dir.c
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@ -985,12 +985,15 @@ static int fuse_access(struct inode *inode, int mask)
* access request is sent. Execute permission is still checked
* locally based on file mode.
*/
static int fuse_permission(struct inode *inode, int mask)
static int fuse_permission(struct inode *inode, int mask, unsigned int flags)
{
struct fuse_conn *fc = get_fuse_conn(inode);
bool refreshed = false;
int err = 0;
if (flags & IPERM_FLAG_RCU)
return -ECHILD;
if (!fuse_allow_task(fc, current))
return -EACCES;
@ -1005,7 +1008,7 @@ static int fuse_permission(struct inode *inode, int mask)
}
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
err = generic_permission(inode, mask, NULL);
err = generic_permission(inode, mask, flags, NULL);
/* If permission is denied, try to refresh file
attributes. This is also needed, because the root
@ -1013,7 +1016,8 @@ static int fuse_permission(struct inode *inode, int mask)
if (err == -EACCES && !refreshed) {
err = fuse_do_getattr(inode, NULL, NULL);
if (!err)
err = generic_permission(inode, mask, NULL);
err = generic_permission(inode, mask,
flags, NULL);
}
/* Note: the opposite of the above test does not