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| author | Darrick J. Wong <djwong@kernel.org> | 2024-04-16 00:54:13 +0300 |
|---|---|---|
| committer | Darrick J. Wong <djwong@kernel.org> | 2024-04-16 00:54:13 +0300 |
| commit | 5b9932f6001c70b984e8c9c2fe09e443beb4baba (patch) | |
| tree | fa095c911ab89720b30300a2a592808e2fd6a199 | |
| parent | 15f78aa3eb07645e7bef15a53b4ae1c757907d2c (diff) | |
| download | linux-5b9932f6001c70b984e8c9c2fe09e443beb4baba.tar.xz | |
vfs: export remap and write check helpers
Export these functions so that the next patch can use them to check the
file ranges being passed to the XFS_IOC_EXCHANGE_RANGE operation.
Cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | fs/read_write.c | 1 | ||||
| -rw-r--r-- | fs/remap_range.c | 4 | ||||
| -rw-r--r-- | include/linux/fs.h | 1 |
3 files changed, 4 insertions, 2 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index d4c036e82b6c..85c096f2c0d0 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1667,6 +1667,7 @@ int generic_write_check_limits(struct file *file, loff_t pos, loff_t *count) return 0; } +EXPORT_SYMBOL_GPL(generic_write_check_limits); /* Like generic_write_checks(), but takes size of write instead of iter. */ int generic_write_checks_count(struct kiocb *iocb, loff_t *count) diff --git a/fs/remap_range.c b/fs/remap_range.c index de07f978ce3e..28246dfc8485 100644 --- a/fs/remap_range.c +++ b/fs/remap_range.c @@ -99,8 +99,7 @@ static int generic_remap_checks(struct file *file_in, loff_t pos_in, return 0; } -static int remap_verify_area(struct file *file, loff_t pos, loff_t len, - bool write) +int remap_verify_area(struct file *file, loff_t pos, loff_t len, bool write) { int mask = write ? MAY_WRITE : MAY_READ; loff_t tmp; @@ -118,6 +117,7 @@ static int remap_verify_area(struct file *file, loff_t pos, loff_t len, return fsnotify_file_area_perm(file, mask, &pos, len); } +EXPORT_SYMBOL_GPL(remap_verify_area); /* * Ensure that we don't remap a partial EOF block in the middle of something diff --git a/include/linux/fs.h b/include/linux/fs.h index 8dfd53b52744..0835faeebe7b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -2119,6 +2119,7 @@ extern ssize_t vfs_read(struct file *, char __user *, size_t, loff_t *); extern ssize_t vfs_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t vfs_copy_file_range(struct file *, loff_t , struct file *, loff_t, size_t, unsigned int); +int remap_verify_area(struct file *file, loff_t pos, loff_t len, bool write); int __generic_remap_file_range_prep(struct file *file_in, loff_t pos_in, struct file *file_out, loff_t pos_out, loff_t *len, unsigned int remap_flags, |