updates inode naming
- kill is_inode_layout_compression [1]
- kill magic underscores [2] [3]
- better naming for datamode & data_mapping_mode [3]
- better naming erofs_inode_{compact, extended} [4]
[1] https://lore.kernel.org/r/20190829102426.GE20598@xxxxxxxxxxxxx/
[2] https://lore.kernel.org/r/20190829102426.GE20598@xxxxxxxxxxxxx/
[3] https://lore.kernel.org/r/20190902122627.GN15931@xxxxxxxxxxxxx/
[4] https://lore.kernel.org/r/20190902125438.GA17750@xxxxxxxxxxxxx/
Reported-by: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Signed-off-by: Gao Xiang <gaoxiang25@xxxxxxxxxx>
---
fs/erofs/data.c | 9 ++--
fs/erofs/erofs_fs.h | 24 ++++-----
fs/erofs/inode.c | 126 +++++++++++++++++++++++++-------------------
fs/erofs/internal.h | 31 ++++++-----
fs/erofs/super.c | 2 +-
fs/erofs/zmap.c | 6 +--
6 files changed, 108 insertions(+), 90 deletions(-)
diff --git a/fs/erofs/data.c b/fs/erofs/data.c
index 0983807737fd..4d9b07991d07 100644
--- a/fs/erofs/data.c
+++ b/fs/erofs/data.c
@@ -113,11 +113,12 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
erofs_blk_t nblocks, lastblk;
u64 offset = map->m_la;
struct erofs_vnode *vi = EROFS_V(inode);
+ bool tailendpacking = (vi->datalayout == EROFS_INODE_FLAT_INLINE);
trace_erofs_map_blocks_flatmode_enter(inode, map, flags);
nblocks = DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
- lastblk = nblocks - is_inode_flat_inline(inode);
+ lastblk = nblocks - tailendpacking;
if (offset >= inode->i_size) {
/* leave out-of-bound access unmapped */
@@ -132,7 +133,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
if (offset < blknr_to_addr(lastblk)) {
map->m_pa = blknr_to_addr(vi->raw_blkaddr) + map->m_la;
map->m_plen = blknr_to_addr(lastblk) - offset;
- } else if (is_inode_flat_inline(inode)) {
+ } else if (tailendpacking) {
/* 2 - inode inline B: inode, [xattrs], inline last blk... */
struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
@@ -169,7 +170,7 @@ static int erofs_map_blocks_flatmode(struct inode *inode,
int erofs_map_blocks(struct inode *inode,
struct erofs_map_blocks *map, int flags)
{
- if (is_inode_layout_compression(inode)) {
+ if (erofs_inode_is_data_compressed(EROFS_V(inode)->datalayout)) {
int err = z_erofs_map_blocks_iter(inode, map, flags);
if (map->mpage) {
@@ -403,7 +404,7 @@ static sector_t erofs_bmap(struct address_space *mapping, sector_t block)
{
struct inode *inode = mapping->host;
- if (is_inode_flat_inline(inode)) {
+ if (EROFS_V(inode)->datalayout == EROFS_INODE_FLAT_INLINE) {
erofs_blk_t blks = i_size_read(inode) >> LOG_BLOCK_SIZE;
if (block >> LOG_SECTORS_PER_BLOCK >= blks)
diff --git a/fs/erofs/erofs_fs.h b/fs/erofs/erofs_fs.h
index b2aef3bc377d..18689e916e94 100644
--- a/fs/erofs/erofs_fs.h
+++ b/fs/erofs/erofs_fs.h
@@ -41,7 +41,7 @@ struct erofs_super_block {
};
/*
- * erofs inode data mapping:
+ * erofs inode datalayout:
* 0 - inode plain without inline data A:
* inode, [xattrs], ... | ... | no-holed data
* 1 - inode VLE compression B (legacy):
@@ -57,7 +57,7 @@ enum {
EROFS_INODE_FLAT_COMPRESSION_LEGACY = 1,
EROFS_INODE_FLAT_INLINE = 2,
EROFS_INODE_FLAT_COMPRESSION = 3,
- EROFS_INODE_LAYOUT_MAX
+ EROFS_INODE_DATALAYOUT_MAX
};
static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
@@ -68,14 +68,14 @@ static inline bool erofs_inode_is_data_compressed(unsigned int datamode)
/* bit definitions of inode i_advise */
#define EROFS_I_VERSION_BITS 1
-#define EROFS_I_DATA_MAPPING_BITS 3
+#define EROFS_I_DATALAYOUT_BITS 3
#define EROFS_I_VERSION_BIT 0
-#define EROFS_I_DATA_MAPPING_BIT 1
+#define EROFS_I_DATALAYOUT_BIT 1
/* 32-byte reduced form of an ondisk inode */
-struct erofs_inode_v1 {
- __le16 i_advise; /* inode hints */
+struct erofs_inode_compact {
+ __le16 i_format; /* inode format hints */
/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
__le16 i_xattr_icount;
@@ -98,13 +98,13 @@ struct erofs_inode_v1 {
};
/* 32 bytes on-disk inode */
-#define EROFS_INODE_LAYOUT_V1 0
+#define EROFS_INODE_LAYOUT_COMPACT 0
/* 64 bytes on-disk inode */
-#define EROFS_INODE_LAYOUT_V2 1
+#define EROFS_INODE_LAYOUT_EXTENDED 1
/* 64-byte complete form of an ondisk inode */
-struct erofs_inode_v2 {
- __le16 i_advise; /* inode hints */
+struct erofs_inode_extended {
+ __le16 i_format; /* inode format hints */
/* 1 header + n-1 * 4 bytes inline xattr to keep continuity */
__le16 i_xattr_icount;
@@ -299,8 +299,8 @@ struct erofs_dirent {
static inline void erofs_check_ondisk_layout_definitions(void)
{
BUILD_BUG_ON(sizeof(struct erofs_super_block) != 128);
- BUILD_BUG_ON(sizeof(struct erofs_inode_v1) != 32);
- BUILD_BUG_ON(sizeof(struct erofs_inode_v2) != 64);
+ BUILD_BUG_ON(sizeof(struct erofs_inode_compact) != 32);
+ BUILD_BUG_ON(sizeof(struct erofs_inode_extended) != 64);
BUILD_BUG_ON(sizeof(struct erofs_xattr_ibody_header) != 12);
BUILD_BUG_ON(sizeof(struct erofs_xattr_entry) != 4);
BUILD_BUG_ON(sizeof(struct z_erofs_map_header) != 8);
diff --git a/fs/erofs/inode.c b/fs/erofs/inode.c
index 3fc4f764b387..494b35e5830a 100644
--- a/fs/erofs/inode.c
+++ b/fs/erofs/inode.c
@@ -12,73 +12,90 @@
static int read_inode(struct inode *inode, void *data)
{
struct erofs_vnode *vi = EROFS_V(inode);
- struct erofs_inode_v1 *v1 = data;
- const unsigned int advise = le16_to_cpu(v1->i_advise);
+ struct erofs_inode_compact *dic = data;
+ struct erofs_inode_extended *die;
+
+ const unsigned int ifmt = le16_to_cpu(dic->i_format);
+ struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
erofs_blk_t nblks = 0;
- vi->datamode = __inode_data_mapping(advise);
+ vi->datalayout = erofs_inode_datalayout(ifmt);
- if (vi->datamode >= EROFS_INODE_LAYOUT_MAX) {
- errln("unsupported data mapping %u of nid %llu",
- vi->datamode, vi->nid);
+ if (vi->datalayout >= EROFS_INODE_DATALAYOUT_MAX) {
+ errln("unsupported datalayout %u of nid %llu",
+ vi->datalayout, vi->nid);
DBG_BUGON(1);
return -EOPNOTSUPP;
}
- if (__inode_version(advise) == EROFS_INODE_LAYOUT_V2) {
- struct erofs_inode_v2 *v2 = data;
+ switch (erofs_inode_version(ifmt)) {
+ case EROFS_INODE_LAYOUT_EXTENDED:
+ die = data;
- vi->inode_isize = sizeof(struct erofs_inode_v2);
- vi->xattr_isize = erofs_xattr_ibody_size(v2->i_xattr_icount);
+ vi->inode_isize = sizeof(struct erofs_inode_extended);
+ vi->xattr_isize = erofs_xattr_ibody_size(die->i_xattr_icount);
- inode->i_mode = le16_to_cpu(v2->i_mode);
- if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode))
- vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
- else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+ inode->i_mode = le16_to_cpu(die->i_mode);
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ case S_IFDIR:
+ case S_IFLNK:
+ vi->raw_blkaddr = le32_to_cpu(die->i_u.raw_blkaddr);
+ break;
+ case S_IFCHR:
+ case S_IFBLK:
inode->i_rdev =
- new_decode_dev(le32_to_cpu(v2->i_u.rdev));
- else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
+ new_decode_dev(le32_to_cpu(die->i_u.rdev));
+ break;
+ case S_IFIFO:
+ case S_IFSOCK:
inode->i_rdev = 0;
- else
+ break;
+ default:
goto bogusimode;
-
- i_uid_write(inode, le32_to_cpu(v2->i_uid));
- i_gid_write(inode, le32_to_cpu(v2->i_gid));
- set_nlink(inode, le32_to_cpu(v2->i_nlink));
+ }
+ i_uid_write(inode, le32_to_cpu(die->i_uid));
+ i_gid_write(inode, le32_to_cpu(die->i_gid));
+ set_nlink(inode, le32_to_cpu(die->i_nlink));
/* ns timestamp */
inode->i_mtime.tv_sec = inode->i_ctime.tv_sec =
- le64_to_cpu(v2->i_ctime);
+ le64_to_cpu(die->i_ctime);
inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec =
- le32_to_cpu(v2->i_ctime_nsec);
+ le32_to_cpu(die->i_ctime_nsec);
- inode->i_size = le64_to_cpu(v2->i_size);
+ inode->i_size = le64_to_cpu(die->i_size);
/* total blocks for compressed files */
- if (is_inode_layout_compression(inode))
- nblks = le32_to_cpu(v2->i_u.compressed_blocks);
- } else if (__inode_version(advise) == EROFS_INODE_LAYOUT_V1) {
- struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
-
- vi->inode_isize = sizeof(struct erofs_inode_v1);
- vi->xattr_isize = erofs_xattr_ibody_size(v1->i_xattr_icount);
-
- inode->i_mode = le16_to_cpu(v1->i_mode);
- if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
- S_ISLNK(inode->i_mode))
- vi->raw_blkaddr = le32_to_cpu(v1->i_u.raw_blkaddr);
- else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+ if (erofs_inode_is_data_compressed(vi->datalayout))
+ nblks = le32_to_cpu(die->i_u.compressed_blocks);
+ break;
+ case EROFS_INODE_LAYOUT_COMPACT:
+ vi->inode_isize = sizeof(struct erofs_inode_compact);
+ vi->xattr_isize = erofs_xattr_ibody_size(dic->i_xattr_icount);
+
+ inode->i_mode = le16_to_cpu(dic->i_mode);
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ case S_IFDIR:
+ case S_IFLNK:
+ vi->raw_blkaddr = le32_to_cpu(dic->i_u.raw_blkaddr);
+ break;
+ case S_IFCHR:
+ case S_IFBLK:
inode->i_rdev =
- new_decode_dev(le32_to_cpu(v1->i_u.rdev));
- else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode))
+ new_decode_dev(le32_to_cpu(dic->i_u.rdev));
+ break;
+ case S_IFIFO:
+ case S_IFSOCK:
inode->i_rdev = 0;
- else
+ break;
+ default:
goto bogusimode;
-
- i_uid_write(inode, le16_to_cpu(v1->i_uid));
- i_gid_write(inode, le16_to_cpu(v1->i_gid));
- set_nlink(inode, le16_to_cpu(v1->i_nlink));
+ }
+ i_uid_write(inode, le16_to_cpu(dic->i_uid));
+ i_gid_write(inode, le16_to_cpu(dic->i_gid));
+ set_nlink(inode, le16_to_cpu(dic->i_nlink));
/* use build time to derive all file time */
inode->i_mtime.tv_sec = inode->i_ctime.tv_sec =
@@ -86,12 +103,13 @@ static int read_inode(struct inode *inode, void *data)
inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec =
sbi->build_time_nsec;
- inode->i_size = le32_to_cpu(v1->i_size);
- if (is_inode_layout_compression(inode))
- nblks = le32_to_cpu(v1->i_u.compressed_blocks);
- } else {
+ inode->i_size = le32_to_cpu(dic->i_size);
+ if (erofs_inode_is_data_compressed(vi->datalayout))
+ nblks = le32_to_cpu(dic->i_u.compressed_blocks);
+ break;
+ default:
errln("unsupported on-disk inode version %u of nid %llu",
- __inode_version(advise), vi->nid);
+ erofs_inode_version(ifmt), vi->nid);
DBG_BUGON(1);
return -EOPNOTSUPP;
}
@@ -125,8 +143,8 @@ static int fill_inline_data(struct inode *inode, void *data,
struct erofs_vnode *vi = EROFS_V(inode);
struct erofs_sb_info *sbi = EROFS_I_SB(inode);
- /* should be inode inline C */
- if (!is_inode_flat_inline(inode))
+ /* should be tail-packing data inline */
+ if (vi->datalayout != EROFS_INODE_FLAT_INLINE)
return 0;
/* fast symlink (following ext4) */
@@ -216,7 +234,7 @@ static int fill_inode(struct inode *inode, int isdir)
goto out_unlock;
}
- if (is_inode_layout_compression(inode)) {
+ if (erofs_inode_is_data_compressed(vi->datalayout)) {
err = z_erofs_fill_inode(inode);
goto out_unlock;
}
@@ -299,7 +317,7 @@ int erofs_getattr(const struct path *path, struct kstat *stat,
{
struct inode *const inode = d_inode(path->dentry);
- if (is_inode_layout_compression(inode))
+ if (erofs_inode_is_data_compressed(EROFS_V(inode)->datalayout))
stat->attributes |= STATX_ATTR_COMPRESSED;
stat->attributes |= STATX_ATTR_IMMUTABLE;
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index 7ff36f404ec3..0f5cbf0a7570 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -285,7 +285,7 @@ struct erofs_vnode {
/* atomic flags (including bitlocks) */
unsigned long flags;
- unsigned char datamode;
+ unsigned char datalayout;
unsigned char inode_isize;
unsigned short xattr_isize;
@@ -310,31 +310,30 @@ struct erofs_vnode {
#define EROFS_V(ptr) \
container_of(ptr, struct erofs_vnode, vfs_inode)
-#define __inode_advise(x, bit, bits) \
- (((x) >> (bit)) & ((1 << (bits)) - 1))
-
-#define __inode_version(advise) \
- __inode_advise(advise, EROFS_I_VERSION_BIT, \
- EROFS_I_VERSION_BITS)
-
-#define __inode_data_mapping(advise) \
- __inode_advise(advise, EROFS_I_DATA_MAPPING_BIT,\
- EROFS_I_DATA_MAPPING_BITS)
-
static inline unsigned long inode_datablocks(struct inode *inode)
{
/* since i_size cannot be changed */
return DIV_ROUND_UP(inode->i_size, EROFS_BLKSIZ);
}
-static inline bool is_inode_layout_compression(struct inode *inode)
+static inline unsigned int erofs_bitrange(unsigned int value, unsigned int bit,
+ unsigned int bits)
+{
+
+ return (value >> bit) & ((1 << bits) - 1);
+}
+
+
+static inline unsigned int erofs_inode_version(unsigned int value)
{
- return erofs_inode_is_data_compressed(EROFS_V(inode)->datamode);
+ return erofs_bitrange(value, EROFS_I_VERSION_BIT,
+ EROFS_I_VERSION_BITS);
}
-static inline bool is_inode_flat_inline(struct inode *inode)
+static inline unsigned int erofs_inode_datalayout(unsigned int value)
{
- return EROFS_V(inode)->datamode == EROFS_INODE_FLAT_INLINE;
+ return erofs_bitrange(value, EROFS_I_DATALAYOUT_BIT,
+ EROFS_I_DATALAYOUT_BITS);
}
extern const struct super_operations erofs_sops;
diff --git a/fs/erofs/super.c b/fs/erofs/super.c
index 6a7ab194783c..8d9f38d56b3b 100644
--- a/fs/erofs/super.c
+++ b/fs/erofs/super.c
@@ -121,7 +121,7 @@ static int superblock_read(struct super_block *sb)
#ifdef CONFIG_EROFS_FS_XATTR
sbi->xattr_blkaddr = le32_to_cpu(layout->xattr_blkaddr);
#endif
- sbi->islotbits = ffs(sizeof(struct erofs_inode_v1)) - 1;
+ sbi->islotbits = ilog2(sizeof(struct erofs_inode_compact));
sbi->root_nid = le16_to_cpu(layout->root_nid);
sbi->inos = le64_to_cpu(layout->inos);
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index 850e0e3d57a8..6a06fb80ef3f 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -12,7 +12,7 @@ int z_erofs_fill_inode(struct inode *inode)
{
struct erofs_vnode *const vi = EROFS_V(inode);
- if (vi->datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY) {
+ if (vi->datalayout == EROFS_INODE_FLAT_COMPRESSION_LEGACY) {
vi->z_advise = 0;
vi->z_algorithmtype[0] = 0;
vi->z_algorithmtype[1] = 0;
@@ -46,7 +46,7 @@ static int fill_inode_lazy(struct inode *inode)
if (test_bit(EROFS_V_Z_INITED_BIT, &vi->flags))
goto out_unlock;
- DBG_BUGON(vi->datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY);
+ DBG_BUGON(vi->datalayout == EROFS_INODE_FLAT_COMPRESSION_LEGACY);
pos = ALIGN(iloc(EROFS_SB(sb), vi->nid) + vi->inode_isize +
vi->xattr_isize, 8);
@@ -314,7 +314,7 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m,
static int vle_load_cluster_from_disk(struct z_erofs_maprecorder *m,
unsigned int lcn)
{
- const unsigned int datamode = EROFS_V(m->inode)->datamode;
+ const unsigned int datamode = EROFS_V(m->inode)->datalayout;
if (datamode == EROFS_INODE_FLAT_COMPRESSION_LEGACY)
return vle_legacy_load_cluster_from_disk(m, lcn);
--
2.17.1
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