diff options
author | Jeff Layton <jeff.layton@primarydata.com> | 2015-07-11 12:43:02 +0200 |
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committer | Jeff Layton <jeff.layton@primarydata.com> | 2015-07-13 12:29:11 +0200 |
commit | 29d01b22eaa18d8b46091d3c98c6001c49f78e4a (patch) | |
tree | 5277436688ea9bc2ba8295d233110b164407b2c0 /fs | |
parent | locks: have flock_lock_file take an inode pointer instead of a filp (diff) | |
download | linux-29d01b22eaa18d8b46091d3c98c6001c49f78e4a.tar.xz linux-29d01b22eaa18d8b46091d3c98c6001c49f78e4a.zip |
locks: new helpers - flock_lock_inode_wait and posix_lock_inode_wait
Allow callers to pass in an inode instead of a filp.
Signed-off-by: Jeff Layton <jeff.layton@primarydata.com>
Reviewed-by: "J. Bruce Fields" <bfields@fieldses.org>
Tested-by: "J. Bruce Fields" <bfields@fieldses.org>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/locks.c | 50 |
1 files changed, 38 insertions, 12 deletions
diff --git a/fs/locks.c b/fs/locks.c index 4366b7c54e6d..ba268a503c1b 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1163,20 +1163,19 @@ int posix_lock_file(struct file *filp, struct file_lock *fl, EXPORT_SYMBOL(posix_lock_file); /** - * posix_lock_file_wait - Apply a POSIX-style lock to a file - * @filp: The file to apply the lock to + * posix_lock_inode_wait - Apply a POSIX-style lock to a file + * @inode: inode of file to which lock request should be applied * @fl: The lock to be applied * - * Add a POSIX style lock to a file. - * We merge adjacent & overlapping locks whenever possible. - * POSIX locks are sorted by owner task, then by starting address + * Variant of posix_lock_file_wait that does not take a filp, and so can be + * used after the filp has already been torn down. */ -int posix_lock_file_wait(struct file *filp, struct file_lock *fl) +int posix_lock_inode_wait(struct inode *inode, struct file_lock *fl) { int error; might_sleep (); for (;;) { - error = posix_lock_file(filp, fl, NULL); + error = __posix_lock_file(inode, fl, NULL); if (error != FILE_LOCK_DEFERRED) break; error = wait_event_interruptible(fl->fl_wait, !fl->fl_next); @@ -1188,6 +1187,21 @@ int posix_lock_file_wait(struct file *filp, struct file_lock *fl) } return error; } +EXPORT_SYMBOL(posix_lock_inode_wait); + +/** + * posix_lock_file_wait - Apply a POSIX-style lock to a file + * @filp: The file to apply the lock to + * @fl: The lock to be applied + * + * Add a POSIX style lock to a file. + * We merge adjacent & overlapping locks whenever possible. + * POSIX locks are sorted by owner task, then by starting address + */ +int posix_lock_file_wait(struct file *filp, struct file_lock *fl) +{ + return posix_lock_inode_wait(file_inode(filp), fl); +} EXPORT_SYMBOL(posix_lock_file_wait); /** @@ -1850,18 +1864,18 @@ int fcntl_setlease(unsigned int fd, struct file *filp, long arg) } /** - * flock_lock_file_wait - Apply a FLOCK-style lock to a file - * @filp: The file to apply the lock to + * flock_lock_inode_wait - Apply a FLOCK-style lock to a file + * @inode: inode of the file to apply to * @fl: The lock to be applied * - * Add a FLOCK style lock to a file. + * Apply a FLOCK style lock request to an inode. */ -int flock_lock_file_wait(struct file *filp, struct file_lock *fl) +int flock_lock_inode_wait(struct inode *inode, struct file_lock *fl) { int error; might_sleep(); for (;;) { - error = flock_lock_inode(file_inode(filp), fl); + error = flock_lock_inode(inode, fl); if (error != FILE_LOCK_DEFERRED) break; error = wait_event_interruptible(fl->fl_wait, !fl->fl_next); @@ -1873,7 +1887,19 @@ int flock_lock_file_wait(struct file *filp, struct file_lock *fl) } return error; } +EXPORT_SYMBOL(flock_lock_inode_wait); +/** + * flock_lock_file_wait - Apply a FLOCK-style lock to a file + * @filp: The file to apply the lock to + * @fl: The lock to be applied + * + * Add a FLOCK style lock to a file. + */ +int flock_lock_file_wait(struct file *filp, struct file_lock *fl) +{ + return flock_lock_inode_wait(file_inode(filp), fl); +} EXPORT_SYMBOL(flock_lock_file_wait); /** |