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| author | Yue Hu <huyue2@coolpad.com> | 2022-09-23 05:11:22 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2022-09-26 18:55:39 +0300 |
| commit | b15b2e307c3a1970d92da77a3ef57ee53d119d8e (patch) | |
| tree | e2fdea78f65addf0eb8af1abc4f3746897eddee1 /fs/erofs/internal.h | |
| parent | fdffc091e6f94602558bba712b51bc16f79fd6d5 (diff) | |
| download | linux-b15b2e307c3a1970d92da77a3ef57ee53d119d8e.tar.xz | |
erofs: support on-disk compressed fragments data
Introduce on-disk compressed fragments data feature.
This approach adds a new field called `h_fragmentoff' in the per-file
compression header to indicate the fragment offset of each tail pcluster
or the whole file in the special packed inode.
Similar to ztailpacking, it will also find and record the 'headlcn'
of the tail pcluster when initializing per-inode zmap for making
follow-on requests more easy.
Signed-off-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/YzHKxcFTlHGgXeH9@B-P7TQMD6M-0146.local
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/internal.h')
| -rw-r--r-- | fs/erofs/internal.h | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 8dbfeb5f4f84..9f89c1da6229 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -131,6 +131,7 @@ struct erofs_sb_info { struct inode *managed_cache; struct erofs_sb_lz4_info lz4; + struct inode *packed_inode; #endif /* CONFIG_EROFS_FS_ZIP */ struct erofs_dev_context *devs; struct dax_device *dax_dev; @@ -289,6 +290,7 @@ EROFS_FEATURE_FUNCS(chunked_file, incompat, INCOMPAT_CHUNKED_FILE) EROFS_FEATURE_FUNCS(device_table, incompat, INCOMPAT_DEVICE_TABLE) EROFS_FEATURE_FUNCS(compr_head2, incompat, INCOMPAT_COMPR_HEAD2) EROFS_FEATURE_FUNCS(ztailpacking, incompat, INCOMPAT_ZTAILPACKING) +EROFS_FEATURE_FUNCS(fragments, incompat, INCOMPAT_FRAGMENTS) EROFS_FEATURE_FUNCS(sb_chksum, compat, COMPAT_SB_CHKSUM) /* atomic flag definitions */ @@ -324,8 +326,13 @@ struct erofs_inode { unsigned char z_algorithmtype[2]; unsigned char z_logical_clusterbits; unsigned long z_tailextent_headlcn; - erofs_off_t z_idataoff; - unsigned short z_idata_size; + union { + struct { + erofs_off_t z_idataoff; + unsigned short z_idata_size; + }; + erofs_off_t z_fragmentoff; + }; }; #endif /* CONFIG_EROFS_FS_ZIP */ }; @@ -384,6 +391,7 @@ extern const struct address_space_operations z_erofs_aops; enum { BH_Encoded = BH_PrivateStart, BH_FullMapped, + BH_Fragment, }; /* Has a disk mapping */ @@ -394,6 +402,8 @@ enum { #define EROFS_MAP_ENCODED (1 << BH_Encoded) /* The length of extent is full */ #define EROFS_MAP_FULL_MAPPED (1 << BH_FullMapped) +/* Located in the special packed inode */ +#define EROFS_MAP_FRAGMENT (1 << BH_Fragment) struct erofs_map_blocks { struct erofs_buf buf; @@ -415,7 +425,7 @@ struct erofs_map_blocks { #define EROFS_GET_BLOCKS_FIEMAP 0x0002 /* Used to map the whole extent if non-negligible data is requested for LZMA */ #define EROFS_GET_BLOCKS_READMORE 0x0004 -/* Used to map tail extent for tailpacking inline pcluster */ +/* Used to map tail extent for tailpacking inline or fragment pcluster */ #define EROFS_GET_BLOCKS_FINDTAIL 0x0008 enum { |