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| author | Jan Kara <jack@suse.cz> | 2021-08-16 11:57:07 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2021-08-31 05:36:51 +0200 |
| commit | 3a6541e97c035dba90cdf37169d73b2d8057e55d (patch) | |
| tree | 7a98a31422d7d5dcc9bd16ac7ff422be13a000ae /Documentation/filesystems/ext4/inodes.rst | |
| parent | ext4: Speedup ext4 orphan inode handling (diff) | |
| download | linux-3a6541e97c035dba90cdf37169d73b2d8057e55d.tar.xz linux-3a6541e97c035dba90cdf37169d73b2d8057e55d.zip | |
ext4: Orphan file documentation
Add documentation about the orphan file feature.
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20210816095713.16537-4-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'Documentation/filesystems/ext4/inodes.rst')
| -rw-r--r-- | Documentation/filesystems/ext4/inodes.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Documentation/filesystems/ext4/inodes.rst b/Documentation/filesystems/ext4/inodes.rst index a65baffb4ebf..6c5ce666e63f 100644 --- a/Documentation/filesystems/ext4/inodes.rst +++ b/Documentation/filesystems/ext4/inodes.rst @@ -498,11 +498,11 @@ structure -- inode change time (ctime), access time (atime), data modification time (mtime), and deletion time (dtime). The four fields are 32-bit signed integers that represent seconds since the Unix epoch (1970-01-01 00:00:00 GMT), which means that the fields will overflow in -January 2038. For inodes that are not linked from any directory but are -still open (orphan inodes), the dtime field is overloaded for use with -the orphan list. The superblock field ``s_last_orphan`` points to the -first inode in the orphan list; dtime is then the number of the next -orphaned inode, or zero if there are no more orphans. +January 2038. If the filesystem does not have orphan_file feature, inodes +that are not linked from any directory but are still open (orphan inodes) have +the dtime field overloaded for use with the orphan list. The superblock field +``s_last_orphan`` points to the first inode in the orphan list; dtime is then +the number of the next orphaned inode, or zero if there are no more orphans. If the inode structure size ``sb->s_inode_size`` is larger than 128 bytes and the ``i_inode_extra`` field is large enough to encompass the |