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This patch implements support for case-insensitive file name lookups in bcachefs. The implementation uses the same UTF-8 lowering and normalization that ext4 and f2fs is using. More information is provided in Documentation/bcachefs/casefolding.rst Compatibility notes: This uses the new versioning scheme for incompatible features where an incompatible feature is tied to a version number: the superblock says "we may use incompat features up to x" and "incompat features up to x are in use", disallowing mounting by previous versions. Additionally, and old style incompat feature bit is used, so that kernels without utf8 casefolding support know if casefolding specifically is in use and they're allowed to mount. Signed-off-by: Joshua Ashton <joshua@froggi.es> Cc: André Almeida <andrealmeid@igalia.com> Cc: Gabriel Krisman Bertazi <krisman@suse.de> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
84 lines
2.2 KiB
C
84 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_FS_IOCTL_H
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#define _BCACHEFS_FS_IOCTL_H
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/* Inode flags: */
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/* bcachefs inode flags -> vfs inode flags: */
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static const __maybe_unused unsigned bch_flags_to_vfs[] = {
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[__BCH_INODE_sync] = S_SYNC,
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[__BCH_INODE_immutable] = S_IMMUTABLE,
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[__BCH_INODE_append] = S_APPEND,
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[__BCH_INODE_noatime] = S_NOATIME,
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[__BCH_INODE_casefolded] = S_CASEFOLD,
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};
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/* bcachefs inode flags -> FS_IOC_GETFLAGS: */
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static const __maybe_unused unsigned bch_flags_to_uflags[] = {
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[__BCH_INODE_sync] = FS_SYNC_FL,
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[__BCH_INODE_immutable] = FS_IMMUTABLE_FL,
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[__BCH_INODE_append] = FS_APPEND_FL,
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[__BCH_INODE_nodump] = FS_NODUMP_FL,
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[__BCH_INODE_noatime] = FS_NOATIME_FL,
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[__BCH_INODE_casefolded] = FS_CASEFOLD_FL,
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};
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/* bcachefs inode flags -> FS_IOC_FSGETXATTR: */
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static const __maybe_unused unsigned bch_flags_to_xflags[] = {
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[__BCH_INODE_sync] = FS_XFLAG_SYNC,
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[__BCH_INODE_immutable] = FS_XFLAG_IMMUTABLE,
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[__BCH_INODE_append] = FS_XFLAG_APPEND,
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[__BCH_INODE_nodump] = FS_XFLAG_NODUMP,
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[__BCH_INODE_noatime] = FS_XFLAG_NOATIME,
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//[__BCH_INODE_PROJINHERIT] = FS_XFLAG_PROJINHERIT;
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};
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#define set_flags(_map, _in, _out) \
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do { \
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unsigned _i; \
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\
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for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
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if ((_in) & (1 << _i)) \
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(_out) |= _map[_i]; \
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else \
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(_out) &= ~_map[_i]; \
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} while (0)
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#define map_flags(_map, _in) \
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({ \
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unsigned _out = 0; \
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\
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set_flags(_map, _in, _out); \
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_out; \
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})
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#define map_flags_rev(_map, _in) \
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({ \
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unsigned _i, _out = 0; \
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\
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for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
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if ((_in) & _map[_i]) { \
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(_out) |= 1 << _i; \
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(_in) &= ~_map[_i]; \
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} \
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(_out); \
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})
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#define map_defined(_map) \
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({ \
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unsigned _in = ~0; \
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\
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map_flags_rev(_map, _in); \
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})
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/* Set VFS inode flags from bcachefs inode: */
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static inline void bch2_inode_flags_to_vfs(struct bch_inode_info *inode)
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{
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set_flags(bch_flags_to_vfs, inode->ei_inode.bi_flags, inode->v.i_flags);
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}
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long bch2_fs_file_ioctl(struct file *, unsigned, unsigned long);
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long bch2_compat_fs_ioctl(struct file *, unsigned, unsigned long);
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#endif /* _BCACHEFS_FS_IOCTL_H */
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