summaryrefslogtreecommitdiff
path: root/fs/erofs/internal.h
diff options
context:
space:
mode:
Diffstat (limited to 'fs/erofs/internal.h')
-rw-r--r--fs/erofs/internal.h148
1 files changed, 50 insertions, 98 deletions
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index bb8501c0ff5b..3f3561d37d1b 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -12,7 +12,6 @@
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/bio.h>
-#include <linux/buffer_head.h>
#include <linux/magic.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
@@ -108,9 +107,12 @@ struct erofs_domain {
struct erofs_fscache {
struct fscache_cookie *cookie;
- struct inode *inode;
- struct inode *anon_inode;
+ struct inode *inode; /* anonymous inode for the blob */
+
+ /* used for share domain mode */
struct erofs_domain *domain;
+ struct list_head node;
+ refcount_t ref;
char *name;
};
@@ -271,11 +273,6 @@ struct erofs_buf {
#define erofs_blkoff(addr) ((addr) % EROFS_BLKSIZ)
#define blknr_to_addr(nr) ((erofs_off_t)(nr) * EROFS_BLKSIZ)
-static inline erofs_off_t iloc(struct erofs_sb_info *sbi, erofs_nid_t nid)
-{
- return blknr_to_addr(sbi->meta_blkaddr) + (nid << sbi->islotbits);
-}
-
#define EROFS_FEATURE_FUNCS(name, compat, feature) \
static inline bool erofs_sb_has_##name(struct erofs_sb_info *sbi) \
{ \
@@ -340,13 +337,14 @@ struct erofs_inode {
struct inode vfs_inode;
};
-#define EROFS_I(ptr) \
- container_of(ptr, struct erofs_inode, vfs_inode)
+#define EROFS_I(ptr) container_of(ptr, struct erofs_inode, vfs_inode)
-static inline unsigned long erofs_inode_datablocks(struct inode *inode)
+static inline erofs_off_t erofs_iloc(struct inode *inode)
{
- /* since i_size cannot be changed */
- return DIV_ROUND_UP(inode->i_size, EROFS_BLKSIZ);
+ struct erofs_sb_info *sbi = EROFS_I_SB(inode);
+
+ return blknr_to_addr(sbi->meta_blkaddr) +
+ (EROFS_I(inode)->nid << sbi->islotbits);
}
static inline unsigned int erofs_bitrange(unsigned int value, unsigned int bit,
@@ -382,31 +380,18 @@ struct page *erofs_grab_cache_page_nowait(struct address_space *mapping,
readahead_gfp_mask(mapping) & ~__GFP_RECLAIM);
}
-extern const struct super_operations erofs_sops;
-extern struct file_system_type erofs_fs_type;
-
-extern const struct address_space_operations erofs_raw_access_aops;
-extern const struct address_space_operations z_erofs_aops;
-
-enum {
- BH_Encoded = BH_PrivateStart,
- BH_FullMapped,
- BH_Fragment,
- BH_Partialref,
-};
-
/* Has a disk mapping */
-#define EROFS_MAP_MAPPED (1 << BH_Mapped)
+#define EROFS_MAP_MAPPED 0x0001
/* Located in metadata (could be copied from bd_inode) */
-#define EROFS_MAP_META (1 << BH_Meta)
+#define EROFS_MAP_META 0x0002
/* The extent is encoded */
-#define EROFS_MAP_ENCODED (1 << BH_Encoded)
+#define EROFS_MAP_ENCODED 0x0004
/* The length of extent is full */
-#define EROFS_MAP_FULL_MAPPED (1 << BH_FullMapped)
+#define EROFS_MAP_FULL_MAPPED 0x0008
/* Located in the special packed inode */
-#define EROFS_MAP_FRAGMENT (1 << BH_Fragment)
+#define EROFS_MAP_FRAGMENT 0x0010
/* The extent refers to partial decompressed data */
-#define EROFS_MAP_PARTIAL_REF (1 << BH_Partialref)
+#define EROFS_MAP_PARTIAL_REF 0x0020
struct erofs_map_blocks {
struct erofs_buf buf;
@@ -419,17 +404,15 @@ struct erofs_map_blocks {
unsigned int m_flags;
};
-/* Flags used by erofs_map_blocks_flatmode() */
-#define EROFS_GET_BLOCKS_RAW 0x0001
/*
* Used to get the exact decompressed length, e.g. fiemap (consider lookback
* approach instead if possible since it's more metadata lightweight.)
*/
-#define EROFS_GET_BLOCKS_FIEMAP 0x0002
+#define EROFS_GET_BLOCKS_FIEMAP 0x0001
/* Used to map the whole extent if non-negligible data is requested for LZMA */
-#define EROFS_GET_BLOCKS_READMORE 0x0004
+#define EROFS_GET_BLOCKS_READMORE 0x0002
/* Used to map tail extent for tailpacking inline or fragment pcluster */
-#define EROFS_GET_BLOCKS_FINDTAIL 0x0008
+#define EROFS_GET_BLOCKS_FINDTAIL 0x0004
enum {
Z_EROFS_COMPRESSION_SHIFTED = Z_EROFS_COMPRESSION_MAX,
@@ -437,24 +420,6 @@ enum {
Z_EROFS_COMPRESSION_RUNTIME_MAX
};
-/* zmap.c */
-extern const struct iomap_ops z_erofs_iomap_report_ops;
-
-#ifdef CONFIG_EROFS_FS_ZIP
-int z_erofs_fill_inode(struct inode *inode);
-int z_erofs_map_blocks_iter(struct inode *inode,
- struct erofs_map_blocks *map,
- int flags);
-#else
-static inline int z_erofs_fill_inode(struct inode *inode) { return -EOPNOTSUPP; }
-static inline int z_erofs_map_blocks_iter(struct inode *inode,
- struct erofs_map_blocks *map,
- int flags)
-{
- return -EOPNOTSUPP;
-}
-#endif /* !CONFIG_EROFS_FS_ZIP */
-
struct erofs_map_dev {
struct erofs_fscache *m_fscache;
struct block_device *m_bdev;
@@ -465,8 +430,27 @@ struct erofs_map_dev {
unsigned int m_deviceid;
};
-/* data.c */
+extern struct file_system_type erofs_fs_type;
+extern const struct super_operations erofs_sops;
+
+extern const struct address_space_operations erofs_raw_access_aops;
+extern const struct address_space_operations z_erofs_aops;
+extern const struct address_space_operations erofs_fscache_access_aops;
+
+extern const struct inode_operations erofs_generic_iops;
+extern const struct inode_operations erofs_symlink_iops;
+extern const struct inode_operations erofs_fast_symlink_iops;
+extern const struct inode_operations erofs_dir_iops;
+
extern const struct file_operations erofs_file_fops;
+extern const struct file_operations erofs_dir_fops;
+
+extern const struct iomap_ops z_erofs_iomap_report_ops;
+
+/* flags for erofs_fscache_register_cookie() */
+#define EROFS_REG_COOKIE_SHARE 0x0001
+#define EROFS_REG_COOKIE_NEED_NOEXIST 0x0002
+
void erofs_unmap_metabuf(struct erofs_buf *buf);
void erofs_put_metabuf(struct erofs_buf *buf);
void *erofs_bread(struct erofs_buf *buf, struct inode *inode,
@@ -476,37 +460,14 @@ void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb,
int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *dev);
int erofs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 start, u64 len);
-int erofs_map_blocks(struct inode *inode,
- struct erofs_map_blocks *map, int flags);
-
-/* inode.c */
-static inline unsigned long erofs_inode_hash(erofs_nid_t nid)
-{
-#if BITS_PER_LONG == 32
- return (nid >> 32) ^ (nid & 0xffffffff);
-#else
- return nid;
-#endif
-}
-
-extern const struct inode_operations erofs_generic_iops;
-extern const struct inode_operations erofs_symlink_iops;
-extern const struct inode_operations erofs_fast_symlink_iops;
-
+int erofs_map_blocks(struct inode *inode, struct erofs_map_blocks *map);
struct inode *erofs_iget(struct super_block *sb, erofs_nid_t nid);
-int erofs_getattr(struct user_namespace *mnt_userns, const struct path *path,
+int erofs_getattr(struct mnt_idmap *idmap, const struct path *path,
struct kstat *stat, u32 request_mask,
unsigned int query_flags);
-
-/* namei.c */
-extern const struct inode_operations erofs_dir_iops;
-
int erofs_namei(struct inode *dir, const struct qstr *name,
erofs_nid_t *nid, unsigned int *d_type);
-/* dir.c */
-extern const struct file_operations erofs_dir_fops;
-
static inline void *erofs_vm_map_ram(struct page **pages, unsigned int count)
{
int retried = 0;
@@ -522,23 +483,19 @@ static inline void *erofs_vm_map_ram(struct page **pages, unsigned int count)
return NULL;
}
-/* pcpubuf.c */
void *erofs_get_pcpubuf(unsigned int requiredpages);
void erofs_put_pcpubuf(void *ptr);
int erofs_pcpubuf_growsize(unsigned int nrpages);
void erofs_pcpubuf_init(void);
void erofs_pcpubuf_exit(void);
-/* sysfs.c */
int erofs_register_sysfs(struct super_block *sb);
void erofs_unregister_sysfs(struct super_block *sb);
int __init erofs_init_sysfs(void);
void erofs_exit_sysfs(void);
-/* utils.c / zdata.c */
struct page *erofs_allocpage(struct page **pagepool, gfp_t gfp);
-static inline void erofs_pagepool_add(struct page **pagepool,
- struct page *page)
+static inline void erofs_pagepool_add(struct page **pagepool, struct page *page)
{
set_page_private(page, (unsigned long)*pagepool);
*pagepool = page;
@@ -564,6 +521,9 @@ int erofs_try_to_free_cached_page(struct page *page);
int z_erofs_load_lz4_config(struct super_block *sb,
struct erofs_super_block *dsb,
struct z_erofs_lz4_cfgs *lz4, int len);
+int z_erofs_fill_inode(struct inode *inode);
+int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
+ int flags);
#else
static inline void erofs_shrinker_register(struct super_block *sb) {}
static inline void erofs_shrinker_unregister(struct super_block *sb) {}
@@ -581,6 +541,7 @@ static inline int z_erofs_load_lz4_config(struct super_block *sb,
}
return 0;
}
+static inline int z_erofs_fill_inode(struct inode *inode) { return -EOPNOTSUPP; }
#endif /* !CONFIG_EROFS_FS_ZIP */
#ifdef CONFIG_EROFS_FS_ZIP_LZMA
@@ -601,23 +562,15 @@ static inline int z_erofs_load_lzma_config(struct super_block *sb,
}
return 0;
}
-#endif /* !CONFIG_EROFS_FS_ZIP */
+#endif /* !CONFIG_EROFS_FS_ZIP_LZMA */
-/* flags for erofs_fscache_register_cookie() */
-#define EROFS_REG_COOKIE_NEED_INODE 1
-#define EROFS_REG_COOKIE_NEED_NOEXIST 2
-
-/* fscache.c */
#ifdef CONFIG_EROFS_FS_ONDEMAND
int erofs_fscache_register_fs(struct super_block *sb);
void erofs_fscache_unregister_fs(struct super_block *sb);
struct erofs_fscache *erofs_fscache_register_cookie(struct super_block *sb,
- char *name,
- unsigned int flags);
+ char *name, unsigned int flags);
void erofs_fscache_unregister_cookie(struct erofs_fscache *fscache);
-
-extern const struct address_space_operations erofs_fscache_access_aops;
#else
static inline int erofs_fscache_register_fs(struct super_block *sb)
{
@@ -627,8 +580,7 @@ static inline void erofs_fscache_unregister_fs(struct super_block *sb) {}
static inline
struct erofs_fscache *erofs_fscache_register_cookie(struct super_block *sb,
- char *name,
- unsigned int flags)
+ char *name, unsigned int flags)
{
return ERR_PTR(-EOPNOTSUPP);
}