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authorTahsin Erdogan <tahsin@google.com>2017-06-22 18:28:55 +0300
committerTheodore Ts'o <tytso@mit.edu>2017-06-22 18:28:55 +0300
commit47387409ee2e09db6d0e79a026a02073dc56bb8c (patch)
tree39bfd4f67236bd8bfefaf6a8910415071d0977a8 /fs/ext4/xattr.c
parentc07dfcb45877fbc6798fa042bab3c4b85378efd4 (diff)
downloadlinux-47387409ee2e09db6d0e79a026a02073dc56bb8c.tar.xz
ext2, ext4: make mb block cache names more explicit
There will be a second mb_cache instance that tracks ea_inodes. Make existing names more explicit so that it is clear that they refer to xattr block cache. Signed-off-by: Tahsin Erdogan <tahsin@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/xattr.c')
-rw-r--r--fs/ext4/xattr.c71
1 files changed, 37 insertions, 34 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 85da7792afd0..53980ee164ed 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -72,10 +72,11 @@
# define ea_bdebug(bh, fmt, ...) no_printk(fmt, ##__VA_ARGS__)
#endif
-static void ext4_xattr_cache_insert(struct mb_cache *, struct buffer_head *);
-static struct buffer_head *ext4_xattr_cache_find(struct inode *,
- struct ext4_xattr_header *,
- struct mb_cache_entry **);
+static void ext4_xattr_block_cache_insert(struct mb_cache *,
+ struct buffer_head *);
+static struct buffer_head *
+ext4_xattr_block_cache_find(struct inode *, struct ext4_xattr_header *,
+ struct mb_cache_entry **);
static void ext4_xattr_rehash(struct ext4_xattr_header *,
struct ext4_xattr_entry *);
@@ -104,8 +105,8 @@ const struct xattr_handler *ext4_xattr_handlers[] = {
NULL
};
-#define EXT4_GET_MB_CACHE(inode) (((struct ext4_sb_info *) \
- inode->i_sb->s_fs_info)->s_mb_cache)
+#define EA_BLOCK_CACHE(inode) (((struct ext4_sb_info *) \
+ inode->i_sb->s_fs_info)->s_ea_block_cache)
#ifdef CONFIG_LOCKDEP
void ext4_xattr_inode_set_class(struct inode *ea_inode)
@@ -374,7 +375,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
struct ext4_xattr_entry *entry;
size_t size;
int error;
- struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
+ struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
name_index, name, buffer, (long)buffer_size);
@@ -395,7 +396,7 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
error = -EFSCORRUPTED;
goto cleanup;
}
- ext4_xattr_cache_insert(ext4_mb_cache, bh);
+ ext4_xattr_block_cache_insert(ea_block_cache, bh);
entry = BFIRST(bh);
error = ext4_xattr_find_entry(&entry, name_index, name, 1);
if (error)
@@ -541,7 +542,6 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
struct inode *inode = d_inode(dentry);
struct buffer_head *bh = NULL;
int error;
- struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
ea_idebug(inode, "buffer=%p, buffer_size=%ld",
buffer, (long)buffer_size);
@@ -563,7 +563,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
error = -EFSCORRUPTED;
goto cleanup;
}
- ext4_xattr_cache_insert(ext4_mb_cache, bh);
+ ext4_xattr_block_cache_insert(EA_BLOCK_CACHE(inode), bh);
error = ext4_xattr_list_entries(dentry, BFIRST(bh), buffer, buffer_size);
cleanup:
@@ -660,7 +660,7 @@ static void
ext4_xattr_release_block(handle_t *handle, struct inode *inode,
struct buffer_head *bh)
{
- struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
+ struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
u32 hash, ref;
int error = 0;
@@ -678,7 +678,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
* This must happen under buffer lock for
* ext4_xattr_block_set() to reliably detect freed block
*/
- mb_cache_entry_delete(ext4_mb_cache, hash, bh->b_blocknr);
+ mb_cache_entry_delete(ea_block_cache, hash, bh->b_blocknr);
get_bh(bh);
unlock_buffer(bh);
ext4_free_blocks(handle, inode, bh, 0, 1,
@@ -690,11 +690,11 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
if (ref == EXT4_XATTR_REFCOUNT_MAX - 1) {
struct mb_cache_entry *ce;
- ce = mb_cache_entry_get(ext4_mb_cache, hash,
+ ce = mb_cache_entry_get(ea_block_cache, hash,
bh->b_blocknr);
if (ce) {
ce->e_reusable = 1;
- mb_cache_entry_put(ext4_mb_cache, ce);
+ mb_cache_entry_put(ea_block_cache, ce);
}
}
@@ -1094,7 +1094,7 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
struct ext4_xattr_search *s = &s_copy;
struct mb_cache_entry *ce = NULL;
int error = 0;
- struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
+ struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
#define header(x) ((struct ext4_xattr_header *)(x))
@@ -1113,7 +1113,7 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
* ext4_xattr_block_set() to reliably detect modified
* block
*/
- mb_cache_entry_delete(ext4_mb_cache, hash,
+ mb_cache_entry_delete(ea_block_cache, hash,
bs->bh->b_blocknr);
ea_bdebug(bs->bh, "modifying in-place");
error = ext4_xattr_set_entry(i, s, handle, inode);
@@ -1121,8 +1121,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
if (!IS_LAST_ENTRY(s->first))
ext4_xattr_rehash(header(s->base),
s->here);
- ext4_xattr_cache_insert(ext4_mb_cache,
- bs->bh);
+ ext4_xattr_block_cache_insert(ea_block_cache,
+ bs->bh);
}
ext4_xattr_block_csum_set(inode, bs->bh);
unlock_buffer(bs->bh);
@@ -1175,7 +1175,8 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
inserted:
if (!IS_LAST_ENTRY(s->first)) {
- new_bh = ext4_xattr_cache_find(inode, header(s->base), &ce);
+ new_bh = ext4_xattr_block_cache_find(inode, header(s->base),
+ &ce);
if (new_bh) {
/* We found an identical block in the cache. */
if (new_bh == bs->bh)
@@ -1220,7 +1221,7 @@ inserted:
EXT4_C2B(EXT4_SB(sb),
1));
brelse(new_bh);
- mb_cache_entry_put(ext4_mb_cache, ce);
+ mb_cache_entry_put(ea_block_cache, ce);
ce = NULL;
new_bh = NULL;
goto inserted;
@@ -1239,8 +1240,8 @@ inserted:
if (error)
goto cleanup_dquot;
}
- mb_cache_entry_touch(ext4_mb_cache, ce);
- mb_cache_entry_put(ext4_mb_cache, ce);
+ mb_cache_entry_touch(ea_block_cache, ce);
+ mb_cache_entry_put(ea_block_cache, ce);
ce = NULL;
} else if (bs->bh && s->base == bs->bh->b_data) {
/* We were modifying this block in-place. */
@@ -1290,7 +1291,7 @@ getblk_failed:
ext4_xattr_block_csum_set(inode, new_bh);
set_buffer_uptodate(new_bh);
unlock_buffer(new_bh);
- ext4_xattr_cache_insert(ext4_mb_cache, new_bh);
+ ext4_xattr_block_cache_insert(ea_block_cache, new_bh);
error = ext4_handle_dirty_metadata(handle, inode,
new_bh);
if (error)
@@ -1308,7 +1309,7 @@ getblk_failed:
cleanup:
if (ce)
- mb_cache_entry_put(ext4_mb_cache, ce);
+ mb_cache_entry_put(ea_block_cache, ce);
brelse(new_bh);
if (!(bs->bh && s->base == bs->bh->b_data))
kfree(s->base);
@@ -2148,15 +2149,16 @@ void ext4_xattr_inode_array_free(struct ext4_xattr_inode_array *ea_inode_array)
}
/*
- * ext4_xattr_cache_insert()
+ * ext4_xattr_block_cache_insert()
*
- * Create a new entry in the extended attribute cache, and insert
+ * Create a new entry in the extended attribute block cache, and insert
* it unless such an entry is already in the cache.
*
* Returns 0, or a negative error number on failure.
*/
static void
-ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh)
+ext4_xattr_block_cache_insert(struct mb_cache *ea_block_cache,
+ struct buffer_head *bh)
{
struct ext4_xattr_header *header = BHDR(bh);
__u32 hash = le32_to_cpu(header->h_hash);
@@ -2164,7 +2166,7 @@ ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh)
EXT4_XATTR_REFCOUNT_MAX;
int error;
- error = mb_cache_entry_create(ext4_mb_cache, GFP_NOFS, hash,
+ error = mb_cache_entry_create(ea_block_cache, GFP_NOFS, hash,
bh->b_blocknr, reusable);
if (error) {
if (error == -EBUSY)
@@ -2214,7 +2216,7 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1,
}
/*
- * ext4_xattr_cache_find()
+ * ext4_xattr_block_cache_find()
*
* Find an identical extended attribute block.
*
@@ -2222,17 +2224,18 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1,
* not found or an error occurred.
*/
static struct buffer_head *
-ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
- struct mb_cache_entry **pce)
+ext4_xattr_block_cache_find(struct inode *inode,
+ struct ext4_xattr_header *header,
+ struct mb_cache_entry **pce)
{
__u32 hash = le32_to_cpu(header->h_hash);
struct mb_cache_entry *ce;
- struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
+ struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
if (!header->h_hash)
return NULL; /* never share */
ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
- ce = mb_cache_entry_find_first(ext4_mb_cache, hash);
+ ce = mb_cache_entry_find_first(ea_block_cache, hash);
while (ce) {
struct buffer_head *bh;
@@ -2245,7 +2248,7 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
return bh;
}
brelse(bh);
- ce = mb_cache_entry_find_next(ext4_mb_cache, ce);
+ ce = mb_cache_entry_find_next(ea_block_cache, ce);
}
return NULL;
}