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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 01:49:58 -0500 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 01:50:29 -0500 |
| commit | b74c79e99389cd79b31fcc08f82c24e492e63c7e (patch) | |
| tree | 763c6b412517306670bc625e90035f2d16bb739f /Documentation/filesystems/porting | |
| parent | 34286d6662308d82aed891852d04c7c3a2649b16 (diff) | |
fs: provide rcu-walk aware permission i_ops
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'Documentation/filesystems/porting')
| -rw-r--r-- | Documentation/filesystems/porting | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index cd9756a2709d..07a32b42cf9c 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting | |||
| @@ -380,3 +380,8 @@ the filesystem provides it), which requires dropping out of rcu-walk mode. This | |||
| 380 | may now be called in rcu-walk mode (nd->flags & LOOKUP_RCU). -ECHILD should be | 380 | may now be called in rcu-walk mode (nd->flags & LOOKUP_RCU). -ECHILD should be |
| 381 | returned if the filesystem cannot handle rcu-walk. See | 381 | returned if the filesystem cannot handle rcu-walk. See |
| 382 | Documentation/filesystems/vfs.txt for more details. | 382 | Documentation/filesystems/vfs.txt for more details. |
| 383 | |||
| 384 | permission and check_acl are inode permission checks that are called | ||
| 385 | on many or all directory inodes on the way down a path walk (to check for | ||
| 386 | exec permission). These must now be rcu-walk aware (flags & IPERM_RCU). See | ||
| 387 | Documentation/filesystems/vfs.txt for more details. | ||