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Diffstat (limited to 'fs/ext4/xattr.c')
-rw-r--r--fs/ext4/xattr.c133
1 files changed, 77 insertions, 56 deletions
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index e56c9ed7d6e3..c081e34f717f 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -61,11 +61,6 @@
#include "xattr.h"
#include "acl.h"
-#define BHDR(bh) ((struct ext4_xattr_header *)((bh)->b_data))
-#define ENTRY(ptr) ((struct ext4_xattr_entry *)(ptr))
-#define BFIRST(bh) ENTRY(BHDR(bh)+1)
-#define IS_LAST_ENTRY(entry) (*(__u32 *)(entry) == 0)
-
#ifdef EXT4_XATTR_DEBUG
# define ea_idebug(inode, f...) do { \
printk(KERN_DEBUG "inode %s:%lu: ", \
@@ -127,20 +122,18 @@ static __le32 ext4_xattr_block_csum(struct inode *inode,
struct ext4_xattr_header *hdr)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
- struct ext4_inode_info *ei = EXT4_I(inode);
- __u32 csum, old;
+ __u32 csum;
+ __le32 save_csum;
+ __le64 dsk_block_nr = cpu_to_le64(block_nr);
- old = hdr->h_checksum;
+ save_csum = hdr->h_checksum;
hdr->h_checksum = 0;
- if (le32_to_cpu(hdr->h_refcount) != 1) {
- block_nr = cpu_to_le64(block_nr);
- csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&block_nr,
- sizeof(block_nr));
- } else
- csum = ei->i_csum_seed;
+ csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&dsk_block_nr,
+ sizeof(dsk_block_nr));
csum = ext4_chksum(sbi, csum, (__u8 *)hdr,
EXT4_BLOCK_SIZE(inode->i_sb));
- hdr->h_checksum = old;
+
+ hdr->h_checksum = save_csum;
return cpu_to_le32(csum);
}
@@ -315,7 +308,7 @@ cleanup:
return error;
}
-static int
+int
ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
void *buffer, size_t buffer_size)
{
@@ -557,7 +550,7 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
error = ext4_handle_dirty_xattr_block(handle, inode, bh);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
- dquot_free_block(inode, 1);
+ dquot_free_block(inode, EXT4_C2B(EXT4_SB(inode->i_sb), 1));
ea_bdebug(bh, "refcount now=%d; releasing",
le32_to_cpu(BHDR(bh)->h_refcount));
}
@@ -584,21 +577,6 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
return (*min_offs - ((void *)last - base) - sizeof(__u32));
}
-struct ext4_xattr_info {
- int name_index;
- const char *name;
- const void *value;
- size_t value_len;
-};
-
-struct ext4_xattr_search {
- struct ext4_xattr_entry *first;
- void *base;
- void *end;
- struct ext4_xattr_entry *here;
- int not_found;
-};
-
static int
ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
{
@@ -651,9 +629,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
size. Just replace. */
s->here->e_value_size =
cpu_to_le32(i->value_len);
- memset(val + size - EXT4_XATTR_PAD, 0,
- EXT4_XATTR_PAD); /* Clear pad bytes. */
- memcpy(val, i->value, i->value_len);
+ if (i->value == EXT4_ZERO_XATTR_VALUE) {
+ memset(val, 0, size);
+ } else {
+ /* Clear pad bytes first. */
+ memset(val + size - EXT4_XATTR_PAD, 0,
+ EXT4_XATTR_PAD);
+ memcpy(val, i->value, i->value_len);
+ }
return 0;
}
@@ -692,9 +675,14 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
size_t size = EXT4_XATTR_SIZE(i->value_len);
void *val = s->base + min_offs - size;
s->here->e_value_offs = cpu_to_le16(min_offs - size);
- memset(val + size - EXT4_XATTR_PAD, 0,
- EXT4_XATTR_PAD); /* Clear the pad bytes. */
- memcpy(val, i->value, i->value_len);
+ if (i->value == EXT4_ZERO_XATTR_VALUE) {
+ memset(val, 0, size);
+ } else {
+ /* Clear the pad bytes first. */
+ memset(val + size - EXT4_XATTR_PAD, 0,
+ EXT4_XATTR_PAD);
+ memcpy(val, i->value, i->value_len);
+ }
}
}
return 0;
@@ -797,7 +785,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
int offset = (char *)s->here - bs->bh->b_data;
unlock_buffer(bs->bh);
- ext4_handle_release_buffer(handle, bs->bh);
if (ce) {
mb_cache_entry_release(ce);
ce = NULL;
@@ -846,7 +833,8 @@ inserted:
else {
/* The old block is released after updating
the inode. */
- error = dquot_alloc_block(inode, 1);
+ error = dquot_alloc_block(inode,
+ EXT4_C2B(EXT4_SB(sb), 1));
if (error)
goto cleanup;
error = ext4_journal_get_write_access(handle,
@@ -900,17 +888,18 @@ inserted:
(unsigned long long)block);
new_bh = sb_getblk(sb, block);
- if (!new_bh) {
+ if (unlikely(!new_bh)) {
+ error = -ENOMEM;
getblk_failed:
ext4_free_blocks(handle, inode, NULL, block, 1,
EXT4_FREE_BLOCKS_METADATA);
- error = -EIO;
goto cleanup;
}
lock_buffer(new_bh);
error = ext4_journal_get_create_access(handle, new_bh);
if (error) {
unlock_buffer(new_bh);
+ error = -EIO;
goto getblk_failed;
}
memcpy(new_bh->b_data, s->base, new_bh->b_size);
@@ -942,7 +931,7 @@ cleanup:
return error;
cleanup_dquot:
- dquot_free_block(inode, 1);
+ dquot_free_block(inode, EXT4_C2B(EXT4_SB(sb), 1));
goto cleanup;
bad_block:
@@ -953,14 +942,8 @@ bad_block:
#undef header
}
-struct ext4_xattr_ibody_find {
- struct ext4_xattr_search s;
- struct ext4_iloc iloc;
-};
-
-static int
-ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
- struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
{
struct ext4_xattr_ibody_header *header;
struct ext4_inode *raw_inode;
@@ -988,10 +971,47 @@ ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
return 0;
}
-static int
-ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
- struct ext4_xattr_info *i,
- struct ext4_xattr_ibody_find *is)
+int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
+ struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
+{
+ struct ext4_xattr_ibody_header *header;
+ struct ext4_xattr_search *s = &is->s;
+ int error;
+
+ if (EXT4_I(inode)->i_extra_isize == 0)
+ return -ENOSPC;
+ error = ext4_xattr_set_entry(i, s);
+ if (error) {
+ if (error == -ENOSPC &&
+ ext4_has_inline_data(inode)) {
+ error = ext4_try_to_evict_inline_data(handle, inode,
+ EXT4_XATTR_LEN(strlen(i->name) +
+ EXT4_XATTR_SIZE(i->value_len)));
+ if (error)
+ return error;
+ error = ext4_xattr_ibody_find(inode, i, is);
+ if (error)
+ return error;
+ error = ext4_xattr_set_entry(i, s);
+ }
+ if (error)
+ return error;
+ }
+ header = IHDR(inode, ext4_raw_inode(&is->iloc));
+ if (!IS_LAST_ENTRY(s->first)) {
+ header->h_magic = cpu_to_le32(EXT4_XATTR_MAGIC);
+ ext4_set_inode_state(inode, EXT4_STATE_XATTR);
+ } else {
+ header->h_magic = cpu_to_le32(0);
+ ext4_clear_inode_state(inode, EXT4_STATE_XATTR);
+ }
+ return 0;
+}
+
+static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
+ struct ext4_xattr_info *i,
+ struct ext4_xattr_ibody_find *is)
{
struct ext4_xattr_ibody_header *header;
struct ext4_xattr_search *s = &is->s;
@@ -1147,9 +1167,10 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
{
handle_t *handle;
int error, retries = 0;
+ int credits = ext4_jbd2_credits_xattr(inode);
retry:
- handle = ext4_journal_start(inode, EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
+ handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
if (IS_ERR(handle)) {
error = PTR_ERR(handle);
} else {
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-17 14:22:54 +0000