linux/fs/xfs
Dave Chinner 27a7a9d903 xfs: silence sparse warning when checking version number
Scrub checks the superblock version number against the known good
feature bits that can be set in the version mask. It calculates
the version mask to compare like so:

	vernum_mask = cpu_to_be16(~XFS_SB_VERSION_OKBITS |
                                  XFS_SB_VERSION_NUMBITS |
                                  XFS_SB_VERSION_ALIGNBIT |
                                  XFS_SB_VERSION_DALIGNBIT |
                                  XFS_SB_VERSION_SHAREDBIT |
                                  XFS_SB_VERSION_LOGV2BIT |
                                  XFS_SB_VERSION_SECTORBIT |
                                  XFS_SB_VERSION_EXTFLGBIT |
                                  XFS_SB_VERSION_DIRV2BIT);

This generates a sparse warning:

fs/xfs/scrub/agheader.c:168:23: warning: cast truncates bits from constant value (ffff3f8f becomes 3f8f)

This is because '~XFS_SB_VERSION_OKBITS' is considered a 32 bit
constant, even though it's value is always under 16 bits.

This is a kinda silly thing to do, because:

/*
 * Supported feature bit list is just all bits in the versionnum field because
 * we've used them all up and understand them all. Except, of course, for the
 * shared superblock bit, which nobody knows what it does and so is unsupported.
 */
#define XFS_SB_VERSION_OKBITS           \
        ((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \
                ~XFS_SB_VERSION_SHAREDBIT)

#define XFS_SB_VERSION_NUMBITS          0x000f
#define XFS_SB_VERSION_ALLFBITS         0xfff0
#define XFS_SB_VERSION_SHAREDBIT        0x0200

XFS_SB_VERSION_OKBITS has a value of 0xfdff, and so
~XFS_SB_VERSION_OKBITS == XFS_SB_VERSION_SHAREDBIT.  The calculated
mask already sets XFS_SB_VERSION_SHAREDBIT, so starting with
~XFS_SB_VERSION_OKBITS is completely redundant....

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
2024-04-22 12:51:43 +05:30
..
libxfs xfs: Increase XFS_DEFER_OPS_NR_INODES to 5 2024-04-15 14:59:01 -07:00
scrub xfs: silence sparse warning when checking version number 2024-04-22 12:51:43 +05:30
Kconfig xfs: support in-memory btrees 2024-02-22 12:43:35 -08:00
Makefile xfs: online repair of symbolic links 2024-04-15 14:58:58 -07:00
xfs_acl.c xfs: convert kmem_free() for kvmalloc users to kvfree() 2024-02-13 18:07:34 +05:30
xfs_acl.h
xfs_aops.c xfs: don't use current->journal_info 2024-03-25 10:21:01 +05:30
xfs_aops.h
xfs_attr_inactive.c xfs: report dir/attr block corruption errors to the health system 2024-02-22 12:32:18 -08:00
xfs_attr_item.c xfs: add an explicit owner field to xfs_da_args 2024-04-15 14:58:50 -07:00
xfs_attr_item.h
xfs_attr_list.c xfs: validate dabtree node buffer owners 2024-04-15 14:58:51 -07:00
xfs_bio_io.c
xfs_bmap_item.c xfs: support recovering bmap intent items targetting realtime extents 2024-02-22 12:44:24 -08:00
xfs_bmap_item.h xfs: move xfs_bmap_defer_add to xfs_bmap_item.c 2024-02-22 12:44:21 -08:00
xfs_bmap_util.c xfs: hoist multi-fsb allocation unit detection to a helper 2024-04-15 14:54:11 -07:00
xfs_bmap_util.h xfs: indicate if xfs_bmap_adjacent changed ap->blkno 2023-12-22 11:18:11 +05:30
xfs_buf_item_recover.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_buf_item.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_buf_item.h
xfs_buf_mem.c xfs: fix dev_t usage in xmbuf tracepoints 2024-03-15 10:30:23 +05:30
xfs_buf_mem.h xfs: launder in-memory btree buffers before transaction commit 2024-02-22 12:43:36 -08:00
xfs_buf.c xfs: repair extended attributes 2024-04-15 14:58:53 -07:00
xfs_buf.h New code for 6.9: 2024-03-13 13:52:24 -07:00
xfs_dahash_test.c
xfs_dahash_test.h
xfs_dir2_readdir.c xfs: validate explicit directory block buffer owners 2024-04-15 14:58:52 -07:00
xfs_discard.c xfs: fix performance problems when fstrimming a subset of a fragmented AG 2024-04-15 14:59:00 -07:00
xfs_discard.h
xfs_dquot_item_recover.c xfs: dquot recovery does not validate the recovered dquot 2023-11-22 23:39:36 +05:30
xfs_dquot_item.c
xfs_dquot_item.h
xfs_dquot.c xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_dquot.h xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_drain.c
xfs_drain.h
xfs_error.c xfs: add error injection to test file mapping exchange recovery 2024-04-15 14:54:19 -07:00
xfs_error.h
xfs_exchmaps_item.c xfs: capture inode generation numbers in the ondisk exchmaps log item 2024-04-15 14:54:24 -07:00
xfs_exchmaps_item.h xfs: create deferred log items for file mapping exchanges 2024-04-15 14:54:17 -07:00
xfs_exchrange.c xfs: support non-power-of-two rtextsize with exchange-range 2024-04-15 14:54:23 -07:00
xfs_exchrange.h xfs: create deferred log items for file mapping exchanges 2024-04-15 14:54:17 -07:00
xfs_export.c xfs: hide private inodes from bulkstat and handle functions 2024-04-15 14:58:48 -07:00
xfs_export.h
xfs_extent_busy.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_extent_busy.h xfs: repair free space btrees 2023-12-15 10:03:32 -08:00
xfs_extfree_item.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_extfree_item.h
xfs_file.c xfs: refactor non-power-of-two alignment checks 2024-04-15 14:54:12 -07:00
xfs_file.h xfs: create a new helper to return a file's allocation unit 2024-04-15 14:54:10 -07:00
xfs_filestream.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_filestream.h
xfs_fsmap.c xfs: split xfs_allocbt_init_cursor 2024-02-22 12:40:12 -08:00
xfs_fsmap.h
xfs_fsops.c New code for 6.8: 2024-01-10 08:45:22 -08:00
xfs_fsops.h xfs: clean up xfs_fsops.h 2023-12-07 14:51:07 +05:30
xfs_globals.c xfs: add debug knobs to control btree bulk load slack factors 2023-12-15 10:03:28 -08:00
xfs_health.c xfs: support in-memory btrees 2024-02-22 12:43:35 -08:00
xfs_hooks.c xfs: allow scrub to hook metadata updates in other writers 2024-02-22 12:30:45 -08:00
xfs_hooks.h xfs: allow scrub to hook metadata updates in other writers 2024-02-22 12:30:45 -08:00
xfs_icache.c xfs: don't use current->journal_info 2024-03-25 10:21:01 +05:30
xfs_icache.h
xfs_icreate_item.c xfs: convert kmem_free() for kvmalloc users to kvfree() 2024-02-13 18:07:34 +05:30
xfs_icreate_item.h
xfs_inode_item_recover.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_inode_item.c xfs: Replace xfs_isilocked with xfs_assert_ilocked 2024-02-19 21:19:33 +05:30
xfs_inode_item.h
xfs_inode.c xfs: Hold inode locks in xfs_rename 2024-04-15 14:59:02 -07:00
xfs_inode.h xfs: Increase XFS_DEFER_OPS_NR_INODES to 5 2024-04-15 14:59:01 -07:00
xfs_ioctl32.c
xfs_ioctl32.h
xfs_ioctl.c xfs: introduce new file range exchange ioctl 2024-04-15 14:54:14 -07:00
xfs_ioctl.h
xfs_iomap.c xfs: report block map corruption errors to the health tracking system 2024-02-22 12:31:51 -08:00
xfs_iomap.h
xfs_iops.c xfs: hide private inodes from bulkstat and handle functions 2024-04-15 14:58:48 -07:00
xfs_iops.h xfs: declare xfs_file.c symbols in xfs_file.h 2024-04-15 14:54:09 -07:00
xfs_itable.c xfs: hide private inodes from bulkstat and handle functions 2024-04-15 14:58:48 -07:00
xfs_itable.h
xfs_iunlink_item.c
xfs_iunlink_item.h
xfs_iwalk.c xfs: pass xfs_buf lookup flags to xfs_*read_agi 2024-04-15 14:54:03 -07:00
xfs_iwalk.h
xfs_linux.h xfs: refactor non-power-of-two alignment checks 2024-04-15 14:54:12 -07:00
xfs_log_cil.c xfs: fix CIL sparse lock context warnings 2024-04-20 20:23:59 +05:30
xfs_log_priv.h xfs: fix CIL sparse lock context warnings 2024-04-20 20:23:59 +05:30
xfs_log_recover.c xfs: capture inode generation numbers in the ondisk exchmaps log item 2024-04-15 14:54:24 -07:00
xfs_log.c xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_log.h xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_message.c
xfs_message.h
xfs_mount.c xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_mount.h xfs: create a incompat flag for atomic file mapping exchanges 2024-04-15 14:54:15 -07:00
xfs_mru_cache.c xfs: use GFP_KERNEL in pure transaction contexts 2024-02-13 18:07:35 +05:30
xfs_mru_cache.h
xfs_notify_failure.c mm, pmem, xfs: Introduce MF_MEM_PRE_REMOVE for unbind 2023-12-07 14:34:26 +05:30
xfs_pnfs.c
xfs_pnfs.h
xfs_pwork.c
xfs_pwork.h
xfs_qm_bhv.c xfs: track quota updates during live quotacheck 2024-02-22 12:30:55 -08:00
xfs_qm_syscalls.c
xfs_qm.c xfs: Hold inode locks in xfs_ialloc 2024-04-15 14:59:02 -07:00
xfs_qm.h xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_quota.h xfs: track quota updates during live quotacheck 2024-02-22 12:30:55 -08:00
xfs_quotaops.c
xfs_refcount_item.c xfs: place intent recovery under NOFS allocation context 2024-02-13 18:07:35 +05:30
xfs_refcount_item.h
xfs_reflink.c xfs: support deferred bmap updates on the attr fork 2024-02-22 12:44:32 -08:00
xfs_reflink.h
xfs_rmap_item.c xfs: place intent recovery under NOFS allocation context 2024-02-13 18:07:35 +05:30
xfs_rmap_item.h
xfs_rtalloc.c xfs: report realtime metadata corruption errors to the health system 2024-02-22 12:32:44 -08:00
xfs_rtalloc.h xfs: move xfs_bmap_rtalloc to xfs_rtalloc.c 2023-12-22 11:18:11 +05:30
xfs_stats.c xfs: define an in-memory btree for storing refcount bag info during repairs 2024-02-22 12:43:40 -08:00
xfs_stats.h xfs: define an in-memory btree for storing refcount bag info during repairs 2024-02-22 12:43:40 -08:00
xfs_super.c xfs: introduce a file mapping exchange log intent item 2024-04-15 14:54:16 -07:00
xfs_super.h
xfs_symlink.c xfs: Hold inode locks in xfs_ialloc 2024-04-15 14:59:02 -07:00
xfs_symlink.h xfs: move remote symlink target read function to libxfs 2024-02-22 12:45:17 -08:00
xfs_sysctl.c fs: Remove the now superfluous sentinel elements from ctl_table array 2023-12-28 04:57:57 -08:00
xfs_sysctl.h xfs: add debug knobs to control btree bulk load slack factors 2023-12-15 10:03:28 -08:00
xfs_sysfs.c xfs: remove duplicate ifdefs 2024-02-17 09:32:32 +05:30
xfs_sysfs.h
xfs_trace.c xfs: bind together the front and back ends of the file range exchange code 2024-04-15 14:54:18 -07:00
xfs_trace.h xfs: repair extended attributes 2024-04-15 14:58:53 -07:00
xfs_trans_ail.c xfs: convert remaining kmem_free() to kfree() 2024-02-13 18:07:34 +05:30
xfs_trans_buf.c xfs: launder in-memory btree buffers before transaction commit 2024-02-22 12:43:36 -08:00
xfs_trans_dquot.c xfs: Increase XFS_QM_TRANS_MAXDQS to 5 2024-04-15 14:59:01 -07:00
xfs_trans_priv.h
xfs_trans.c xfs: Hold inode locks in xfs_trans_alloc_dir 2024-04-15 14:59:02 -07:00
xfs_trans.h xfs: don't use current->journal_info 2024-03-25 10:21:01 +05:30
xfs_xattr.c xfs: only clear log incompat flags at clean unmount 2024-04-15 14:54:06 -07:00
xfs_xattr.h
xfs.h