Source kernel commit: 999f2f9a63f475192d837a2b8595eb0962984d21
Signed-off-by: Gao Xiang <hsiang...@linux.alibaba.com>
---
lib/zmap.c | 158 ++++++++++++++++++++++++++---------------------------
1 file changed, 77 insertions(+), 81 deletions(-)
diff --git a/lib/zmap.c b/lib/zmap.c
index f1cdc66..74c0033 100644
--- a/lib/zmap.c
+++ b/lib/zmap.c
@@ -10,10 +10,6 @@
#include "erofs/internal.h"
#include "erofs/print.h"
-static int z_erofs_do_map_blocks(struct erofs_inode *vi,
- struct erofs_map_blocks *map,
- int flags);
-
int z_erofs_fill_inode(struct erofs_inode *vi)
{
struct erofs_sb_info *sbi = vi->sbi;
@@ -31,83 +27,6 @@ int z_erofs_fill_inode(struct erofs_inode *vi)
return 0;
}
-static int z_erofs_fill_inode_lazy(struct erofs_inode *vi)
-{
- int ret;
- erofs_off_t pos;
- struct z_erofs_map_header *h;
- char buf[sizeof(struct z_erofs_map_header)];
- struct erofs_sb_info *sbi = vi->sbi;
-
- if (vi->flags & EROFS_I_Z_INITED)
- return 0;
-
- pos = round_up(erofs_iloc(vi) + vi->inode_isize + vi->xattr_isize, 8);
- ret = erofs_dev_read(sbi, 0, buf, pos, sizeof(buf));
- if (ret < 0)
- return -EIO;
-
- h = (struct z_erofs_map_header *)buf;
- /*
- * if the highest bit of the 8-byte map header is set, the whole file
- * is stored in the packed inode. The rest bits keeps z_fragmentoff.
- */
- if (h->h_clusterbits >> Z_EROFS_FRAGMENT_INODE_BIT) {
- vi->z_advise = Z_EROFS_ADVISE_FRAGMENT_PCLUSTER;
- vi->fragmentoff = le64_to_cpu(*(__le64 *)h) ^ (1ULL << 63);
- vi->z_tailextent_headlcn = 0;
- goto out;
- }
-
- vi->z_advise = le16_to_cpu(h->h_advise);
- vi->z_algorithmtype[0] = h->h_algorithmtype & 15;
- vi->z_algorithmtype[1] = h->h_algorithmtype >> 4;
-
- if (vi->z_algorithmtype[0] >= Z_EROFS_COMPRESSION_MAX) {
- erofs_err("unknown compression format %u for nid %llu",
- vi->z_algorithmtype[0], (unsigned long long)vi->nid);
- return -EOPNOTSUPP;
- }
-
- vi->z_logical_clusterbits = sbi->blkszbits + (h->h_clusterbits & 7);
- if (vi->datalayout == EROFS_INODE_COMPRESSED_COMPACT &&
- !(vi->z_advise & Z_EROFS_ADVISE_BIG_PCLUSTER_1) ^
- !(vi->z_advise & Z_EROFS_ADVISE_BIG_PCLUSTER_2)) {
- erofs_err("big pcluster head1/2 of compact indexes should be
consistent for nid %llu",
- vi->nid * 1ULL);
- return -EFSCORRUPTED;
- }
-
- if (vi->z_advise & Z_EROFS_ADVISE_INLINE_PCLUSTER) {
- struct erofs_map_blocks map = { .index = UINT_MAX };
-
- vi->idata_size = le16_to_cpu(h->h_idata_size);
- ret = z_erofs_do_map_blocks(vi, &map,
- EROFS_GET_BLOCKS_FINDTAIL);
- if (!map.m_plen ||
- erofs_blkoff(sbi, map.m_pa) + map.m_plen >
erofs_blksiz(sbi)) {
- erofs_err("invalid tail-packing pclustersize %llu",
- map.m_plen | 0ULL);
- return -EFSCORRUPTED;
- }
- if (ret < 0)
- return ret;
- }
- if (vi->z_advise & Z_EROFS_ADVISE_FRAGMENT_PCLUSTER &&
- !(h->h_clusterbits >> Z_EROFS_FRAGMENT_INODE_BIT)) {
- struct erofs_map_blocks map = { .index = UINT_MAX };
-
- vi->fragmentoff = le32_to_cpu(h->h_fragmentoff);
- ret = z_erofs_do_map_blocks(vi, &map,
- EROFS_GET_BLOCKS_FINDTAIL);
- if (ret < 0)
- return ret;
- }
-out:
- vi->flags |= EROFS_I_Z_INITED;
- return 0;
-}
-
struct z_erofs_maprecorder {
struct erofs_inode *inode;
struct erofs_map_blocks *map;
@@ -668,6 +587,83 @@ out:
return err;
}
+static int z_erofs_fill_inode_lazy(struct erofs_inode *vi)
+{
+ int ret;
+ erofs_off_t pos;
+ struct z_erofs_map_header *h;
+ char buf[sizeof(struct z_erofs_map_header)];
+ struct erofs_sb_info *sbi = vi->sbi;
+
+ if (vi->flags & EROFS_I_Z_INITED)
+ return 0;
+
+ pos = round_up(erofs_iloc(vi) + vi->inode_isize + vi->xattr_isize, 8);
+ ret = erofs_dev_read(sbi, 0, buf, pos, sizeof(buf));
+ if (ret < 0)
+ return -EIO;
+
+ h = (struct z_erofs_map_header *)buf;
+ /*
+ * if the highest bit of the 8-byte map header is set, the whole file
+ * is stored in the packed inode. The rest bits keeps z_fragmentoff.
+ */
+ if (h->h_clusterbits >> Z_EROFS_FRAGMENT_INODE_BIT) {
+ vi->z_advise = Z_EROFS_ADVISE_FRAGMENT_PCLUSTER;
+ vi->fragmentoff = le64_to_cpu(*(__le64 *)h) ^ (1ULL << 63);
+ vi->z_tailextent_headlcn = 0;
+ goto out;
+ }
+
+ vi->z_advise = le16_to_cpu(h->h_advise);
+ vi->z_algorithmtype[0] = h->h_algorithmtype & 15;
+ vi->z_algorithmtype[1] = h->h_algorithmtype >> 4;
+
+ if (vi->z_algorithmtype[0] >= Z_EROFS_COMPRESSION_MAX) {
+ erofs_err("unknown compression format %u for nid %llu",
+ vi->z_algorithmtype[0], (unsigned long long)vi->nid);
+ return -EOPNOTSUPP;
+ }
+
+ vi->z_logical_clusterbits = sbi->blkszbits + (h->h_clusterbits & 7);
+ if (vi->datalayout == EROFS_INODE_COMPRESSED_COMPACT &&
+ !(vi->z_advise & Z_EROFS_ADVISE_BIG_PCLUSTER_1) ^
+ !(vi->z_advise & Z_EROFS_ADVISE_BIG_PCLUSTER_2)) {
+ erofs_err("big pcluster head1/2 of compact indexes should be
consistent for nid %llu",
+ vi->nid * 1ULL);
+ return -EFSCORRUPTED;
+ }
+
+ if (vi->z_advise & Z_EROFS_ADVISE_INLINE_PCLUSTER) {
+ struct erofs_map_blocks map = { .index = UINT_MAX };
+
+ vi->idata_size = le16_to_cpu(h->h_idata_size);
+ ret = z_erofs_do_map_blocks(vi, &map,
+ EROFS_GET_BLOCKS_FINDTAIL);
+ if (!map.m_plen ||
+ erofs_blkoff(sbi, map.m_pa) + map.m_plen >
erofs_blksiz(sbi)) {
+ erofs_err("invalid tail-packing pclustersize %llu",
+ map.m_plen | 0ULL);
+ return -EFSCORRUPTED;
+ }
+ if (ret < 0)
+ return ret;
+ }
+ if (vi->z_advise & Z_EROFS_ADVISE_FRAGMENT_PCLUSTER &&
+ !(h->h_clusterbits >> Z_EROFS_FRAGMENT_INODE_BIT)) {
+ struct erofs_map_blocks map = { .index = UINT_MAX };
+
+ vi->fragmentoff = le32_to_cpu(h->h_fragmentoff);
+ ret = z_erofs_do_map_blocks(vi, &map,
+ EROFS_GET_BLOCKS_FINDTAIL);
+ if (ret < 0)
+ return ret;
+ }
+out:
+ vi->flags |= EROFS_I_Z_INITED;
+ return 0;
+}
+
int z_erofs_map_blocks_iter(struct erofs_inode *vi,
struct erofs_map_blocks *map,
int flags)
--
2.43.5
