diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-11-28 17:09:57 -0500 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-11-28 17:09:57 -0500 |
commit | c66fb347946ebdd5b10908866ecc9fa05ee2cf3d (patch) | |
tree | 1891142352d75dcf58a1e90d8dde4d4a99c6e266 /include | |
parent | 71993e62a47dabddf10302807d6aa260455503f4 (diff) |
Export 'get_pipe_info()' to other users
And in particular, use it in 'pipe_fcntl()'.
The other pipe functions do not need to use the 'careful' version, since
they are only ever called for things that are already known to be pipes.
The normal read/write/ioctl functions are called through the file
operations structures, so if a file isn't a pipe, they'd never get
called. But pipe_fcntl() is special, and called directly from the
generic fcntl code, and needs to use the same careful function that the
splice code is using.
Cc: Jens Axboe <jaxboe@fusionio.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/pipe_fs_i.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/pipe_fs_i.h b/include/linux/pipe_fs_i.h index 445796945ac9..3c5ac3147428 100644 --- a/include/linux/pipe_fs_i.h +++ b/include/linux/pipe_fs_i.h | |||
@@ -161,4 +161,16 @@ void generic_pipe_buf_release(struct pipe_inode_info *, struct pipe_buffer *); | |||
161 | /* for F_SETPIPE_SZ and F_GETPIPE_SZ */ | 161 | /* for F_SETPIPE_SZ and F_GETPIPE_SZ */ |
162 | long pipe_fcntl(struct file *, unsigned int, unsigned long arg); | 162 | long pipe_fcntl(struct file *, unsigned int, unsigned long arg); |
163 | 163 | ||
164 | /* | ||
165 | * After the inode slimming patch, i_pipe/i_bdev/i_cdev share the same | ||
166 | * location, so checking ->i_pipe is not enough to verify that this is a | ||
167 | * pipe. | ||
168 | */ | ||
169 | static inline struct pipe_inode_info *get_pipe_info(struct file *file) | ||
170 | { | ||
171 | struct inode *i = file->f_path.dentry->d_inode; | ||
172 | |||
173 | return S_ISFIFO(i->i_mode) ? i->i_pipe : NULL; | ||
174 | } | ||
175 | |||
164 | #endif | 176 | #endif |