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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-03 11:35:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-08-03 11:35:20 -0700 |
| commit | a782e866497217f22c5d9014cbb7be8549151376 (patch) | |
| tree | f1fd2e196c53618e2485d7bc04b654158fefa21f /Documentation | |
| parent | d9395512c5bd326924ba0b36ee0d5d51d763a8d6 (diff) | |
| parent | 868941b14441282ba08761b770fc6cad69d5bdb7 (diff) | |
Merge tag 'pull-work.lseek' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs lseek updates from Al Viro:
"Jason's lseek series.
Saner handling of 'lseek should fail with ESPIPE' - this gets rid of
the magical no_llseek thing and makes checks consistent.
In particular, the ad-hoc "can we do splice via internal pipe" checks
got saner (and somewhat more permissive, which is what Jason had been
after, AFAICT)"
* tag 'pull-work.lseek' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: remove no_llseek
fs: check FMODE_LSEEK to control internal pipe splicing
vfio: do not set FMODE_LSEEK flag
dma-buf: remove useless FMODE_LSEEK flag
fs: do not compare against ->llseek
fs: clear or set FMODE_LSEEK based on llseek function
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/porting.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/filesystems/porting.rst b/Documentation/filesystems/porting.rst index 2e0e4f0e0c6f..aee9aaf9f3df 100644 --- a/Documentation/filesystems/porting.rst +++ b/Documentation/filesystems/porting.rst @@ -914,3 +914,11 @@ Calling conventions for file_open_root() changed; now it takes struct path * instead of passing mount and dentry separately. For callers that used to pass <mnt, mnt->mnt_root> pair (i.e. the root of given mount), a new helper is provided - file_open_root_mnt(). In-tree users adjusted. + +--- + +**mandatory** + +no_llseek is gone; don't set .llseek to that - just leave it NULL instead. +Checks for "does that file have llseek(2), or should it fail with ESPIPE" +should be done by looking at FMODE_LSEEK in file->f_mode. |