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2019-08-22ext4: documentation fixesAyush Ranjan
This commit aims to fix the following issues in ext4 documentation: - Flexible block group docs said that the aim was to group block metadata together instead of block group metadata. - The documentation consistly uses "location" instead of "block number". It is easy to confuse location to be an absolute offset on disk. Added a line to clarify all location values are in terms of block numbers. - Dirent2 docs said that the rec_len field is shortened instead of the name_len field. - Typo in bg_checksum description. - Inode size is 160 bytes now, and hence i_extra_isize is now 32. - Cluster size formula was incorrect, it did not include the +10 to s_log_cluster_size value. - Typo: there were two s_wtime_hi in the superblock struct. - Superblock struct was outdated, added the new fields which were part of s_reserved earlier. - Multiple mount protection seems to be implemented in fs/ext4/mmp.c. Signed-off-by: Ayush Ranjan <ayushr2@illinois.edu> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Andreas Dilger <adilger@dilger.ca>
2018-10-05docs: promote the ext4 data structures book to top levelDarrick J. Wong
Move the ext4 data structures book to Documentation/filesystems/ext4/ since the administrative information moved elsewhere. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>