diff options
Diffstat (limited to 'Documentation/filesystems/fiemap.rst')
| -rw-r--r-- | Documentation/filesystems/fiemap.rst | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/Documentation/filesystems/fiemap.rst b/Documentation/filesystems/fiemap.rst index 2a572e7edc08..93fc96f760aa 100644 --- a/Documentation/filesystems/fiemap.rst +++ b/Documentation/filesystems/fiemap.rst @@ -206,16 +206,18 @@ EINTR once fatal signal received. Flag checking should be done at the beginning of the ->fiemap callback via the -fiemap_check_flags() helper:: +fiemap_prep() helper:: - int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags); + int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo, + u64 start, u64 *len, u32 supported_flags); The struct fieinfo should be passed in as received from ioctl_fiemap(). The set of fiemap flags which the fs understands should be passed via fs_flags. If -fiemap_check_flags finds invalid user flags, it will place the bad values in +fiemap_prep finds invalid user flags, it will place the bad values in fieinfo->fi_flags and return -EBADR. If the file system gets -EBADR, from -fiemap_check_flags(), it should immediately exit, returning that error back to -ioctl_fiemap(). +fiemap_prep(), it should immediately exit, returning that error back to +ioctl_fiemap(). Additionally the range is validate against the supported +maximum file size. For each extent in the request range, the file system should call |