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| author | Ryusuke Konishi <konishi.ryusuke@gmail.com> | 2024-08-15 09:44:07 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-02 05:43:34 +0200 |
| commit | 4b901256a7bf6db3ca84ee2b2e87a1af4d40b8a3 (patch) | |
| tree | 5aa63248077ca7b6e6d0f2e48c6d61210e8830e3 /fs/nilfs2/nilfs.h | |
| parent | nilfs2: add support for FS_IOC_GETFSSYSFSPATH (diff) | |
| download | linux-4b901256a7bf6db3ca84ee2b2e87a1af4d40b8a3.tar.xz linux-4b901256a7bf6db3ca84ee2b2e87a1af4d40b8a3.zip | |
nilfs2: add support for FS_IOC_GETFSLABEL
Implement support for FS_IOC_GETFSLABEL ioctl to read filesystem label.
Link: https://lkml.kernel.org/r/20240815074408.5550-4-konishi.ryusuke@gmail.com
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/nilfs2/nilfs.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index 4017f7856440..3097490b6621 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -103,6 +103,18 @@ enum { NILFS_SB_COMMIT_ALL /* Commit both super blocks */ }; +/** + * define NILFS_MAX_VOLUME_NAME - maximum number of characters (bytes) in a + * file system volume name + * + * Defined by the size of the volume name field in the on-disk superblocks. + * This volume name does not include the terminating NULL byte if the string + * length matches the field size, so use (NILFS_MAX_VOLUME_NAME + 1) for the + * size of the buffer that requires a NULL byte termination. + */ +#define NILFS_MAX_VOLUME_NAME \ + sizeof_field(struct nilfs_super_block, s_volume_name) + /* * Macros to check inode numbers */ |