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ext4: xattr-in-inode support
Large xattr support is implemented for EXT4_FEATURE_INCOMPAT_EA_INODE.
If the size of an xattr value is larger than will fit in a single
external block, then the xattr value will be saved into the body
of an external xattr inode.
The also helps support a larger number of xattr, since only the headers
will be stored in the in-inode space or the single external block.
The inode is referenced from the xattr header via "e_value_inum",
which was formerly "e_value_block", but that field was never used.
The e_value_size still contains the xattr size so that listing
xattrs does not need to look up the inode if the data is not accessed.
struct ext4_xattr_entry {
__u8 e_name_len; /* length of name */
__u8 e_name_index; /* attribute name index */
__le16 e_value_offs; /* offset in disk block of value */
__le32 e_value_inum; /* inode in which value is stored */
__le32 e_value_size; /* size of attribute value */
__le32 e_hash; /* hash value of name and value */
char e_name[0]; /* attribute name */
};
The xattr inode is marked with the EXT4_EA_INODE_FL flag and also
holds a back-reference to the owning inode in its i_mtime field,
allowing the ext4/e2fsck to verify the correct inode is accessed.
[ Applied fix by Dan Carpenter to avoid freeing an ERR_PTR. ]
Lustre-Jira: https://jira.hpdd.intel.com/browse/LU-80
Lustre-bugzilla: https://bugzilla.lustre.org/show_bug.cgi?id=4424
Signed-off-by: Kalpak Shah <kalpak.shah@sun.com>
Signed-off-by: James Simmons <uja.ornl@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
This commit is contained in:
Andreas Dilger
Theodore Ts'o
parent
e08ac99fa2
commit
e50e5129f3
@ -1797,6 +1797,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt, ENCRYPT)
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EXT4_FEATURE_INCOMPAT_EXTENTS| \
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EXT4_FEATURE_INCOMPAT_64BIT| \
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EXT4_FEATURE_INCOMPAT_FLEX_BG| \
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EXT4_FEATURE_INCOMPAT_EA_INODE| \
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EXT4_FEATURE_INCOMPAT_MMP | \
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EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
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EXT4_FEATURE_INCOMPAT_ENCRYPT | \
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@ -2230,6 +2231,12 @@ struct mmpd_data {
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*/
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#define EXT4_MMP_MAX_CHECK_INTERVAL 300UL
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/*
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* Maximum size of xattr attributes for FEATURE_INCOMPAT_EA_INODE 1Mb
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* This limit is arbitrary, but is reasonable for the xattr API.
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*/
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#define EXT4_XATTR_MAX_LARGE_EA_SIZE (1024 * 1024)
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/*
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* Function prototypes
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*/
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@ -2242,6 +2249,10 @@ struct mmpd_data {
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# define ATTRIB_NORET __attribute__((noreturn))
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# define NORET_AND noreturn,
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struct ext4_xattr_ino_array {
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unsigned int xia_count; /* # of used item in the array */
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unsigned int xia_inodes[0];
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};
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/* bitmap.c */
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extern unsigned int ext4_count_free(char *bitmap, unsigned numchars);
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void ext4_inode_bitmap_csum_set(struct super_block *sb, ext4_group_t group,
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@ -2489,6 +2500,7 @@ extern int ext4_truncate_restart_trans(handle_t *, struct inode *, int nblocks);
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extern void ext4_set_inode_flags(struct inode *);
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extern int ext4_alloc_da_blocks(struct inode *inode);
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extern void ext4_set_aops(struct inode *inode);
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extern int ext4_meta_trans_blocks(struct inode *, int nrblocks, int chunk);
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extern int ext4_writepage_trans_blocks(struct inode *);
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extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
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extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
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@ -294,7 +294,6 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
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* as writing the quota to disk may need the lock as well.
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*/
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dquot_initialize(inode);
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ext4_xattr_delete_inode(handle, inode);
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dquot_free_inode(inode);
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dquot_drop(inode);
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@ -61,7 +61,7 @@ static int get_max_inline_xattr_value_size(struct inode *inode,
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/* Compute min_offs. */
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for (; !IS_LAST_ENTRY(entry); entry = EXT4_XATTR_NEXT(entry)) {
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if (!entry->e_value_block && entry->e_value_size) {
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if (!entry->e_value_inum && entry->e_value_size) {
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size_t offs = le16_to_cpu(entry->e_value_offs);
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if (offs < min_offs)
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min_offs = offs;
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@ -139,8 +139,6 @@ static void ext4_invalidatepage(struct page *page, unsigned int offset,
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unsigned int length);
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static int __ext4_journalled_writepage(struct page *page, unsigned int len);
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static int ext4_bh_delay_or_unwritten(handle_t *handle, struct buffer_head *bh);
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static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
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int pextents);
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/*
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* Test whether an inode is a fast symlink.
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@ -189,6 +187,8 @@ void ext4_evict_inode(struct inode *inode)
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{
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handle_t *handle;
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int err;
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int extra_credits = 3;
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struct ext4_xattr_ino_array *lea_ino_array = NULL;
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trace_ext4_evict_inode(inode);
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@ -238,8 +238,8 @@ void ext4_evict_inode(struct inode *inode)
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* protection against it
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*/
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sb_start_intwrite(inode->i_sb);
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handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE,
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ext4_blocks_for_truncate(inode)+3);
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handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, extra_credits);
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if (IS_ERR(handle)) {
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ext4_std_error(inode->i_sb, PTR_ERR(handle));
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/*
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@ -251,9 +251,36 @@ void ext4_evict_inode(struct inode *inode)
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sb_end_intwrite(inode->i_sb);
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goto no_delete;
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}
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if (IS_SYNC(inode))
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ext4_handle_sync(handle);
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/*
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* Delete xattr inode before deleting the main inode.
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*/
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err = ext4_xattr_delete_inode(handle, inode, &lea_ino_array);
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if (err) {
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ext4_warning(inode->i_sb,
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"couldn't delete inode's xattr (err %d)", err);
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goto stop_handle;
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}
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if (!IS_NOQUOTA(inode))
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extra_credits += 2 * EXT4_QUOTA_DEL_BLOCKS(inode->i_sb);
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if (!ext4_handle_has_enough_credits(handle,
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ext4_blocks_for_truncate(inode) + extra_credits)) {
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err = ext4_journal_extend(handle,
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ext4_blocks_for_truncate(inode) + extra_credits);
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if (err > 0)
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err = ext4_journal_restart(handle,
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ext4_blocks_for_truncate(inode) + extra_credits);
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if (err != 0) {
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ext4_warning(inode->i_sb,
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"couldn't extend journal (err %d)", err);
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goto stop_handle;
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}
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}
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inode->i_size = 0;
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err = ext4_mark_inode_dirty(handle, inode);
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if (err) {
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@ -277,10 +304,10 @@ void ext4_evict_inode(struct inode *inode)
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* enough credits left in the handle to remove the inode from
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* the orphan list and set the dtime field.
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*/
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if (!ext4_handle_has_enough_credits(handle, 3)) {
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err = ext4_journal_extend(handle, 3);
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if (!ext4_handle_has_enough_credits(handle, extra_credits)) {
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err = ext4_journal_extend(handle, extra_credits);
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if (err > 0)
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err = ext4_journal_restart(handle, 3);
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err = ext4_journal_restart(handle, extra_credits);
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if (err != 0) {
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ext4_warning(inode->i_sb,
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"couldn't extend journal (err %d)", err);
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@ -315,8 +342,12 @@ void ext4_evict_inode(struct inode *inode)
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ext4_clear_inode(inode);
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else
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ext4_free_inode(handle, inode);
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ext4_journal_stop(handle);
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sb_end_intwrite(inode->i_sb);
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if (lea_ino_array != NULL)
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ext4_xattr_inode_array_free(inode, lea_ino_array);
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return;
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no_delete:
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ext4_clear_inode(inode); /* We must guarantee clearing of inode... */
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@ -5504,7 +5535,7 @@ static int ext4_index_trans_blocks(struct inode *inode, int lblocks,
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*
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* Also account for superblock, inode, quota and xattr blocks
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*/
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static int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
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int ext4_meta_trans_blocks(struct inode *inode, int lblocks,
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int pextents)
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{
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ext4_group_t groups, ngroups = ext4_get_groups_count(inode->i_sb);
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563
fs/ext4/xattr.c
563
fs/ext4/xattr.c
@ -177,9 +177,8 @@ ext4_xattr_check_entries(struct ext4_xattr_entry *entry, void *end,
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/* Check the values */
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while (!IS_LAST_ENTRY(entry)) {
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if (entry->e_value_block != 0)
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return -EFSCORRUPTED;
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if (entry->e_value_size != 0) {
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if (entry->e_value_size != 0 &&
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entry->e_value_inum == 0) {
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u16 offs = le16_to_cpu(entry->e_value_offs);
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u32 size = le32_to_cpu(entry->e_value_size);
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void *value;
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@ -269,6 +268,99 @@ ext4_xattr_find_entry(struct ext4_xattr_entry **pentry, int name_index,
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return cmp ? -ENODATA : 0;
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}
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/*
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* Read the EA value from an inode.
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*/
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static int
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ext4_xattr_inode_read(struct inode *ea_inode, void *buf, size_t *size)
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{
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unsigned long block = 0;
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struct buffer_head *bh = NULL;
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int blocksize;
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size_t csize, ret_size = 0;
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if (*size == 0)
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return 0;
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blocksize = ea_inode->i_sb->s_blocksize;
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while (ret_size < *size) {
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csize = (*size - ret_size) > blocksize ? blocksize :
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*size - ret_size;
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bh = ext4_bread(NULL, ea_inode, block, 0);
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if (IS_ERR(bh)) {
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*size = ret_size;
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return PTR_ERR(bh);
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}
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memcpy(buf, bh->b_data, csize);
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brelse(bh);
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buf += csize;
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block += 1;
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ret_size += csize;
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}
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*size = ret_size;
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return 0;
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}
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struct inode *ext4_xattr_inode_iget(struct inode *parent, unsigned long ea_ino, int *err)
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{
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struct inode *ea_inode = NULL;
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ea_inode = ext4_iget(parent->i_sb, ea_ino);
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if (IS_ERR(ea_inode) || is_bad_inode(ea_inode)) {
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int rc = IS_ERR(ea_inode) ? PTR_ERR(ea_inode) : 0;
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ext4_error(parent->i_sb, "error while reading EA inode %lu "
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"/ %d %d", ea_ino, rc, is_bad_inode(ea_inode));
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*err = rc != 0 ? rc : -EIO;
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return NULL;
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}
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if (EXT4_XATTR_INODE_GET_PARENT(ea_inode) != parent->i_ino ||
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ea_inode->i_generation != parent->i_generation) {
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ext4_error(parent->i_sb, "Backpointer from EA inode %lu "
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"to parent invalid.", ea_ino);
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*err = -EINVAL;
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goto error;
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}
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if (!(EXT4_I(ea_inode)->i_flags & EXT4_EA_INODE_FL)) {
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ext4_error(parent->i_sb, "EA inode %lu does not have "
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"EXT4_EA_INODE_FL flag set.\n", ea_ino);
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*err = -EINVAL;
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goto error;
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}
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*err = 0;
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return ea_inode;
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error:
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iput(ea_inode);
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return NULL;
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}
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/*
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* Read the value from the EA inode.
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*/
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static int
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ext4_xattr_inode_get(struct inode *inode, unsigned long ea_ino, void *buffer,
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size_t *size)
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{
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struct inode *ea_inode = NULL;
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int err;
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ea_inode = ext4_xattr_inode_iget(inode, ea_ino, &err);
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if (err)
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return err;
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err = ext4_xattr_inode_read(ea_inode, buffer, size);
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iput(ea_inode);
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return err;
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}
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static int
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ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
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void *buffer, size_t buffer_size)
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@ -308,8 +400,16 @@ ext4_xattr_block_get(struct inode *inode, int name_index, const char *name,
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error = -ERANGE;
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if (size > buffer_size)
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goto cleanup;
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memcpy(buffer, bh->b_data + le16_to_cpu(entry->e_value_offs),
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size);
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if (entry->e_value_inum) {
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error = ext4_xattr_inode_get(inode,
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le32_to_cpu(entry->e_value_inum),
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buffer, &size);
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if (error)
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goto cleanup;
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} else {
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memcpy(buffer, bh->b_data +
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le16_to_cpu(entry->e_value_offs), size);
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}
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}
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error = size;
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@ -350,8 +450,16 @@ ext4_xattr_ibody_get(struct inode *inode, int name_index, const char *name,
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error = -ERANGE;
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if (size > buffer_size)
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goto cleanup;
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memcpy(buffer, (void *)IFIRST(header) +
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le16_to_cpu(entry->e_value_offs), size);
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if (entry->e_value_inum) {
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error = ext4_xattr_inode_get(inode,
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le32_to_cpu(entry->e_value_inum),
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buffer, &size);
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if (error)
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goto cleanup;
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} else {
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memcpy(buffer, (void *)IFIRST(header) +
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le16_to_cpu(entry->e_value_offs), size);
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}
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}
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error = size;
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@ -620,7 +728,7 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
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size_t *min_offs, void *base, int *total)
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{
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for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
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if (last->e_value_size) {
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if (!last->e_value_inum && last->e_value_size) {
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size_t offs = le16_to_cpu(last->e_value_offs);
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if (offs < *min_offs)
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*min_offs = offs;
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@ -631,16 +739,171 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
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return (*min_offs - ((void *)last - base) - sizeof(__u32));
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}
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static int
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ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
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/*
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* Write the value of the EA in an inode.
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*/
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static int ext4_xattr_inode_write(handle_t *handle, struct inode *ea_inode,
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const void *buf, int bufsize)
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{
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struct buffer_head *bh = NULL;
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unsigned long block = 0;
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unsigned blocksize = ea_inode->i_sb->s_blocksize;
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unsigned max_blocks = (bufsize + blocksize - 1) >> ea_inode->i_blkbits;
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int csize, wsize = 0;
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int ret = 0;
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int retries = 0;
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retry:
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while (ret >= 0 && ret < max_blocks) {
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struct ext4_map_blocks map;
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map.m_lblk = block += ret;
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map.m_len = max_blocks -= ret;
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ret = ext4_map_blocks(handle, ea_inode, &map,
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EXT4_GET_BLOCKS_CREATE);
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if (ret <= 0) {
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ext4_mark_inode_dirty(handle, ea_inode);
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if (ret == -ENOSPC &&
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ext4_should_retry_alloc(ea_inode->i_sb, &retries)) {
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ret = 0;
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goto retry;
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}
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break;
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}
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}
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if (ret < 0)
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return ret;
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block = 0;
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while (wsize < bufsize) {
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if (bh != NULL)
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brelse(bh);
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csize = (bufsize - wsize) > blocksize ? blocksize :
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bufsize - wsize;
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bh = ext4_getblk(handle, ea_inode, block, 0);
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if (IS_ERR(bh))
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return PTR_ERR(bh);
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ret = ext4_journal_get_write_access(handle, bh);
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if (ret)
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goto out;
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memcpy(bh->b_data, buf, csize);
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set_buffer_uptodate(bh);
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ext4_handle_dirty_metadata(handle, ea_inode, bh);
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buf += csize;
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wsize += csize;
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block += 1;
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}
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inode_lock(ea_inode);
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i_size_write(ea_inode, wsize);
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ext4_update_i_disksize(ea_inode, wsize);
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inode_unlock(ea_inode);
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ext4_mark_inode_dirty(handle, ea_inode);
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out:
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brelse(bh);
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return ret;
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}
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/*
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* Create an inode to store the value of a large EA.
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*/
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static struct inode *ext4_xattr_inode_create(handle_t *handle,
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struct inode *inode)
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{
|
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struct inode *ea_inode = NULL;
|
||||
|
||||
/*
|
||||
* Let the next inode be the goal, so we try and allocate the EA inode
|
||||
* in the same group, or nearby one.
|
||||
*/
|
||||
ea_inode = ext4_new_inode(handle, inode->i_sb->s_root->d_inode,
|
||||
S_IFREG | 0600, NULL, inode->i_ino + 1, NULL);
|
||||
if (!IS_ERR(ea_inode)) {
|
||||
ea_inode->i_op = &ext4_file_inode_operations;
|
||||
ea_inode->i_fop = &ext4_file_operations;
|
||||
ext4_set_aops(ea_inode);
|
||||
ea_inode->i_generation = inode->i_generation;
|
||||
EXT4_I(ea_inode)->i_flags |= EXT4_EA_INODE_FL;
|
||||
|
||||
/*
|
||||
* A back-pointer from EA inode to parent inode will be useful
|
||||
* for e2fsck.
|
||||
*/
|
||||
EXT4_XATTR_INODE_SET_PARENT(ea_inode, inode->i_ino);
|
||||
unlock_new_inode(ea_inode);
|
||||
}
|
||||
|
||||
return ea_inode;
|
||||
}
|
||||
|
||||
/*
|
||||
* Unlink the inode storing the value of the EA.
|
||||
*/
|
||||
int ext4_xattr_inode_unlink(struct inode *inode, unsigned long ea_ino)
|
||||
{
|
||||
struct inode *ea_inode = NULL;
|
||||
int err;
|
||||
|
||||
ea_inode = ext4_xattr_inode_iget(inode, ea_ino, &err);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
clear_nlink(ea_inode);
|
||||
iput(ea_inode);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Add value of the EA in an inode.
|
||||
*/
|
||||
static int ext4_xattr_inode_set(handle_t *handle, struct inode *inode,
|
||||
unsigned long *ea_ino, const void *value,
|
||||
size_t value_len)
|
||||
{
|
||||
struct inode *ea_inode;
|
||||
int err;
|
||||
|
||||
/* Create an inode for the EA value */
|
||||
ea_inode = ext4_xattr_inode_create(handle, inode);
|
||||
if (IS_ERR(ea_inode))
|
||||
return PTR_ERR(ea_inode);
|
||||
|
||||
err = ext4_xattr_inode_write(handle, ea_inode, value, value_len);
|
||||
if (err)
|
||||
clear_nlink(ea_inode);
|
||||
else
|
||||
*ea_ino = ea_inode->i_ino;
|
||||
|
||||
iput(ea_inode);
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
static int ext4_xattr_set_entry(struct ext4_xattr_info *i,
|
||||
struct ext4_xattr_search *s,
|
||||
handle_t *handle, struct inode *inode)
|
||||
{
|
||||
struct ext4_xattr_entry *last;
|
||||
size_t free, min_offs = s->end - s->base, name_len = strlen(i->name);
|
||||
int in_inode = i->in_inode;
|
||||
int rc;
|
||||
|
||||
if (ext4_has_feature_ea_inode(inode->i_sb) &&
|
||||
(EXT4_XATTR_SIZE(i->value_len) >
|
||||
EXT4_XATTR_MIN_LARGE_EA_SIZE(inode->i_sb->s_blocksize)))
|
||||
in_inode = 1;
|
||||
|
||||
/* Compute min_offs and last. */
|
||||
last = s->first;
|
||||
for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
|
||||
if (last->e_value_size) {
|
||||
if (!last->e_value_inum && last->e_value_size) {
|
||||
size_t offs = le16_to_cpu(last->e_value_offs);
|
||||
if (offs < min_offs)
|
||||
min_offs = offs;
|
||||
@ -648,15 +911,20 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
|
||||
}
|
||||
free = min_offs - ((void *)last - s->base) - sizeof(__u32);
|
||||
if (!s->not_found) {
|
||||
if (s->here->e_value_size) {
|
||||
if (!in_inode &&
|
||||
!s->here->e_value_inum && s->here->e_value_size) {
|
||||
size_t size = le32_to_cpu(s->here->e_value_size);
|
||||
free += EXT4_XATTR_SIZE(size);
|
||||
}
|
||||
free += EXT4_XATTR_LEN(name_len);
|
||||
}
|
||||
if (i->value) {
|
||||
if (free < EXT4_XATTR_LEN(name_len) +
|
||||
EXT4_XATTR_SIZE(i->value_len))
|
||||
size_t value_len = EXT4_XATTR_SIZE(i->value_len);
|
||||
|
||||
if (in_inode)
|
||||
value_len = 0;
|
||||
|
||||
if (free < EXT4_XATTR_LEN(name_len) + value_len)
|
||||
return -ENOSPC;
|
||||
}
|
||||
|
||||
@ -670,7 +938,8 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
|
||||
s->here->e_name_len = name_len;
|
||||
memcpy(s->here->e_name, i->name, name_len);
|
||||
} else {
|
||||
if (s->here->e_value_size) {
|
||||
if (!s->here->e_value_inum && s->here->e_value_size &&
|
||||
s->here->e_value_offs > 0) {
|
||||
void *first_val = s->base + min_offs;
|
||||
size_t offs = le16_to_cpu(s->here->e_value_offs);
|
||||
void *val = s->base + offs;
|
||||
@ -704,12 +973,18 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
|
||||
last = s->first;
|
||||
while (!IS_LAST_ENTRY(last)) {
|
||||
size_t o = le16_to_cpu(last->e_value_offs);
|
||||
if (last->e_value_size && o < offs)
|
||||
if (!last->e_value_inum &&
|
||||
last->e_value_size && o < offs)
|
||||
last->e_value_offs =
|
||||
cpu_to_le16(o + size);
|
||||
last = EXT4_XATTR_NEXT(last);
|
||||
}
|
||||
}
|
||||
if (s->here->e_value_inum) {
|
||||
ext4_xattr_inode_unlink(inode,
|
||||
le32_to_cpu(s->here->e_value_inum));
|
||||
s->here->e_value_inum = 0;
|
||||
}
|
||||
if (!i->value) {
|
||||
/* Remove the old name. */
|
||||
size_t size = EXT4_XATTR_LEN(name_len);
|
||||
@ -722,11 +997,20 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
|
||||
|
||||
if (i->value) {
|
||||
/* Insert the new value. */
|
||||
s->here->e_value_size = cpu_to_le32(i->value_len);
|
||||
if (i->value_len) {
|
||||
if (in_inode) {
|
||||
unsigned long ea_ino =
|
||||
le32_to_cpu(s->here->e_value_inum);
|
||||
rc = ext4_xattr_inode_set(handle, inode, &ea_ino,
|
||||
i->value, i->value_len);
|
||||
if (rc)
|
||||
goto out;
|
||||
s->here->e_value_inum = cpu_to_le32(ea_ino);
|
||||
s->here->e_value_offs = 0;
|
||||
} else if (i->value_len) {
|
||||
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);
|
||||
s->here->e_value_inum = 0;
|
||||
if (i->value == EXT4_ZERO_XATTR_VALUE) {
|
||||
memset(val, 0, size);
|
||||
} else {
|
||||
@ -736,8 +1020,11 @@ ext4_xattr_set_entry(struct ext4_xattr_info *i, struct ext4_xattr_search *s)
|
||||
memcpy(val, i->value, i->value_len);
|
||||
}
|
||||
}
|
||||
s->here->e_value_size = cpu_to_le32(i->value_len);
|
||||
}
|
||||
return 0;
|
||||
|
||||
out:
|
||||
return rc;
|
||||
}
|
||||
|
||||
struct ext4_xattr_block_find {
|
||||
@ -801,8 +1088,6 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
|
||||
|
||||
#define header(x) ((struct ext4_xattr_header *)(x))
|
||||
|
||||
if (i->value && i->value_len > sb->s_blocksize)
|
||||
return -ENOSPC;
|
||||
if (s->base) {
|
||||
BUFFER_TRACE(bs->bh, "get_write_access");
|
||||
error = ext4_journal_get_write_access(handle, bs->bh);
|
||||
@ -821,7 +1106,7 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
|
||||
mb_cache_entry_delete_block(ext4_mb_cache, hash,
|
||||
bs->bh->b_blocknr);
|
||||
ea_bdebug(bs->bh, "modifying in-place");
|
||||
error = ext4_xattr_set_entry(i, s);
|
||||
error = ext4_xattr_set_entry(i, s, handle, inode);
|
||||
if (!error) {
|
||||
if (!IS_LAST_ENTRY(s->first))
|
||||
ext4_xattr_rehash(header(s->base),
|
||||
@ -870,7 +1155,7 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
|
||||
s->end = s->base + sb->s_blocksize;
|
||||
}
|
||||
|
||||
error = ext4_xattr_set_entry(i, s);
|
||||
error = ext4_xattr_set_entry(i, s, handle, inode);
|
||||
if (error == -EFSCORRUPTED)
|
||||
goto bad_block;
|
||||
if (error)
|
||||
@ -1070,7 +1355,7 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
|
||||
|
||||
if (EXT4_I(inode)->i_extra_isize == 0)
|
||||
return -ENOSPC;
|
||||
error = ext4_xattr_set_entry(i, s);
|
||||
error = ext4_xattr_set_entry(i, s, handle, inode);
|
||||
if (error) {
|
||||
if (error == -ENOSPC &&
|
||||
ext4_has_inline_data(inode)) {
|
||||
@ -1082,7 +1367,7 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
|
||||
error = ext4_xattr_ibody_find(inode, i, is);
|
||||
if (error)
|
||||
return error;
|
||||
error = ext4_xattr_set_entry(i, s);
|
||||
error = ext4_xattr_set_entry(i, s, handle, inode);
|
||||
}
|
||||
if (error)
|
||||
return error;
|
||||
@ -1098,7 +1383,7 @@ int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ext4_xattr_ibody_set(struct inode *inode,
|
||||
static int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
|
||||
struct ext4_xattr_info *i,
|
||||
struct ext4_xattr_ibody_find *is)
|
||||
{
|
||||
@ -1108,7 +1393,7 @@ static int ext4_xattr_ibody_set(struct inode *inode,
|
||||
|
||||
if (EXT4_I(inode)->i_extra_isize == 0)
|
||||
return -ENOSPC;
|
||||
error = ext4_xattr_set_entry(i, s);
|
||||
error = ext4_xattr_set_entry(i, s, handle, inode);
|
||||
if (error)
|
||||
return error;
|
||||
header = IHDR(inode, ext4_raw_inode(&is->iloc));
|
||||
@ -1155,7 +1440,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
|
||||
.name = name,
|
||||
.value = value,
|
||||
.value_len = value_len,
|
||||
|
||||
.in_inode = 0,
|
||||
};
|
||||
struct ext4_xattr_ibody_find is = {
|
||||
.s = { .not_found = -ENODATA, },
|
||||
@ -1204,7 +1489,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
|
||||
}
|
||||
if (!value) {
|
||||
if (!is.s.not_found)
|
||||
error = ext4_xattr_ibody_set(inode, &i, &is);
|
||||
error = ext4_xattr_ibody_set(handle, inode, &i, &is);
|
||||
else if (!bs.s.not_found)
|
||||
error = ext4_xattr_block_set(handle, inode, &i, &bs);
|
||||
} else {
|
||||
@ -1215,7 +1500,7 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
|
||||
if (!bs.s.not_found && ext4_xattr_value_same(&bs.s, &i))
|
||||
goto cleanup;
|
||||
|
||||
error = ext4_xattr_ibody_set(inode, &i, &is);
|
||||
error = ext4_xattr_ibody_set(handle, inode, &i, &is);
|
||||
if (!error && !bs.s.not_found) {
|
||||
i.value = NULL;
|
||||
error = ext4_xattr_block_set(handle, inode, &i, &bs);
|
||||
@ -1226,11 +1511,20 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index,
|
||||
goto cleanup;
|
||||
}
|
||||
error = ext4_xattr_block_set(handle, inode, &i, &bs);
|
||||
if (ext4_has_feature_ea_inode(inode->i_sb) &&
|
||||
error == -ENOSPC) {
|
||||
/* xattr not fit to block, store at external
|
||||
* inode */
|
||||
i.in_inode = 1;
|
||||
error = ext4_xattr_ibody_set(handle, inode,
|
||||
&i, &is);
|
||||
}
|
||||
if (error)
|
||||
goto cleanup;
|
||||
if (!is.s.not_found) {
|
||||
i.value = NULL;
|
||||
error = ext4_xattr_ibody_set(inode, &i, &is);
|
||||
error = ext4_xattr_ibody_set(handle, inode, &i,
|
||||
&is);
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1269,12 +1563,26 @@ ext4_xattr_set(struct inode *inode, int name_index, const char *name,
|
||||
const void *value, size_t value_len, int flags)
|
||||
{
|
||||
handle_t *handle;
|
||||
struct super_block *sb = inode->i_sb;
|
||||
int error, retries = 0;
|
||||
int credits = ext4_jbd2_credits_xattr(inode);
|
||||
|
||||
error = dquot_initialize(inode);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
if ((value_len >= EXT4_XATTR_MIN_LARGE_EA_SIZE(sb->s_blocksize)) &&
|
||||
ext4_has_feature_ea_inode(sb)) {
|
||||
int nrblocks = (value_len + sb->s_blocksize - 1) >>
|
||||
sb->s_blocksize_bits;
|
||||
|
||||
/* For new inode */
|
||||
credits += EXT4_SINGLEDATA_TRANS_BLOCKS(sb) + 3;
|
||||
|
||||
/* For data blocks of EA inode */
|
||||
credits += ext4_meta_trans_blocks(inode, nrblocks, 0);
|
||||
}
|
||||
|
||||
retry:
|
||||
handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
|
||||
if (IS_ERR(handle)) {
|
||||
@ -1286,7 +1594,7 @@ retry:
|
||||
value, value_len, flags);
|
||||
error2 = ext4_journal_stop(handle);
|
||||
if (error == -ENOSPC &&
|
||||
ext4_should_retry_alloc(inode->i_sb, &retries))
|
||||
ext4_should_retry_alloc(sb, &retries))
|
||||
goto retry;
|
||||
if (error == 0)
|
||||
error = error2;
|
||||
@ -1311,7 +1619,7 @@ static void ext4_xattr_shift_entries(struct ext4_xattr_entry *entry,
|
||||
|
||||
/* Adjust the value offsets of the entries */
|
||||
for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
|
||||
if (last->e_value_size) {
|
||||
if (!last->e_value_inum && last->e_value_size) {
|
||||
new_offs = le16_to_cpu(last->e_value_offs) +
|
||||
value_offs_shift;
|
||||
last->e_value_offs = cpu_to_le16(new_offs);
|
||||
@ -1372,7 +1680,7 @@ static int ext4_xattr_move_to_block(handle_t *handle, struct inode *inode,
|
||||
goto out;
|
||||
|
||||
/* Remove the chosen entry from the inode */
|
||||
error = ext4_xattr_ibody_set(inode, &i, is);
|
||||
error = ext4_xattr_ibody_set(handle, inode, &i, is);
|
||||
if (error)
|
||||
goto out;
|
||||
|
||||
@ -1572,21 +1880,135 @@ cleanup:
|
||||
}
|
||||
|
||||
|
||||
#define EIA_INCR 16 /* must be 2^n */
|
||||
#define EIA_MASK (EIA_INCR - 1)
|
||||
/* Add the large xattr @ino into @lea_ino_array for later deletion.
|
||||
* If @lea_ino_array is new or full it will be grown and the old
|
||||
* contents copied over.
|
||||
*/
|
||||
static int
|
||||
ext4_expand_ino_array(struct ext4_xattr_ino_array **lea_ino_array, __u32 ino)
|
||||
{
|
||||
if (*lea_ino_array == NULL) {
|
||||
/*
|
||||
* Start with 15 inodes, so it fits into a power-of-two size.
|
||||
* If *lea_ino_array is NULL, this is essentially offsetof()
|
||||
*/
|
||||
(*lea_ino_array) =
|
||||
kmalloc(offsetof(struct ext4_xattr_ino_array,
|
||||
xia_inodes[EIA_MASK]),
|
||||
GFP_NOFS);
|
||||
if (*lea_ino_array == NULL)
|
||||
return -ENOMEM;
|
||||
(*lea_ino_array)->xia_count = 0;
|
||||
} else if (((*lea_ino_array)->xia_count & EIA_MASK) == EIA_MASK) {
|
||||
/* expand the array once all 15 + n * 16 slots are full */
|
||||
struct ext4_xattr_ino_array *new_array = NULL;
|
||||
int count = (*lea_ino_array)->xia_count;
|
||||
|
||||
/* if new_array is NULL, this is essentially offsetof() */
|
||||
new_array = kmalloc(
|
||||
offsetof(struct ext4_xattr_ino_array,
|
||||
xia_inodes[count + EIA_INCR]),
|
||||
GFP_NOFS);
|
||||
if (new_array == NULL)
|
||||
return -ENOMEM;
|
||||
memcpy(new_array, *lea_ino_array,
|
||||
offsetof(struct ext4_xattr_ino_array,
|
||||
xia_inodes[count]));
|
||||
kfree(*lea_ino_array);
|
||||
*lea_ino_array = new_array;
|
||||
}
|
||||
(*lea_ino_array)->xia_inodes[(*lea_ino_array)->xia_count++] = ino;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Add xattr inode to orphan list
|
||||
*/
|
||||
static int
|
||||
ext4_xattr_inode_orphan_add(handle_t *handle, struct inode *inode,
|
||||
int credits, struct ext4_xattr_ino_array *lea_ino_array)
|
||||
{
|
||||
struct inode *ea_inode = NULL;
|
||||
int idx = 0, error = 0;
|
||||
|
||||
if (lea_ino_array == NULL)
|
||||
return 0;
|
||||
|
||||
for (; idx < lea_ino_array->xia_count; ++idx) {
|
||||
if (!ext4_handle_has_enough_credits(handle, credits)) {
|
||||
error = ext4_journal_extend(handle, credits);
|
||||
if (error > 0)
|
||||
error = ext4_journal_restart(handle, credits);
|
||||
|
||||
if (error != 0) {
|
||||
ext4_warning(inode->i_sb,
|
||||
"couldn't extend journal "
|
||||
"(err %d)", error);
|
||||
return error;
|
||||
}
|
||||
}
|
||||
ea_inode = ext4_xattr_inode_iget(inode,
|
||||
lea_ino_array->xia_inodes[idx], &error);
|
||||
if (error)
|
||||
continue;
|
||||
ext4_orphan_add(handle, ea_inode);
|
||||
/* the inode's i_count will be released by caller */
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* ext4_xattr_delete_inode()
|
||||
*
|
||||
* Free extended attribute resources associated with this inode. This
|
||||
* Free extended attribute resources associated with this inode. Traverse
|
||||
* all entries and unlink any xattr inodes associated with this inode. This
|
||||
* is called immediately before an inode is freed. We have exclusive
|
||||
* access to the inode.
|
||||
* access to the inode. If an orphan inode is deleted it will also delete any
|
||||
* xattr block and all xattr inodes. They are checked by ext4_xattr_inode_iget()
|
||||
* to ensure they belong to the parent inode and were not deleted already.
|
||||
*/
|
||||
void
|
||||
ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
|
||||
int
|
||||
ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
|
||||
struct ext4_xattr_ino_array **lea_ino_array)
|
||||
{
|
||||
struct buffer_head *bh = NULL;
|
||||
struct ext4_xattr_ibody_header *header;
|
||||
struct ext4_inode *raw_inode;
|
||||
struct ext4_iloc iloc;
|
||||
struct ext4_xattr_entry *entry;
|
||||
int credits = 3, error = 0;
|
||||
|
||||
if (!EXT4_I(inode)->i_file_acl)
|
||||
if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR))
|
||||
goto delete_external_ea;
|
||||
|
||||
error = ext4_get_inode_loc(inode, &iloc);
|
||||
if (error)
|
||||
goto cleanup;
|
||||
raw_inode = ext4_raw_inode(&iloc);
|
||||
header = IHDR(inode, raw_inode);
|
||||
for (entry = IFIRST(header); !IS_LAST_ENTRY(entry);
|
||||
entry = EXT4_XATTR_NEXT(entry)) {
|
||||
if (!entry->e_value_inum)
|
||||
continue;
|
||||
if (ext4_expand_ino_array(lea_ino_array,
|
||||
entry->e_value_inum) != 0) {
|
||||
brelse(iloc.bh);
|
||||
goto cleanup;
|
||||
}
|
||||
entry->e_value_inum = 0;
|
||||
}
|
||||
brelse(iloc.bh);
|
||||
|
||||
delete_external_ea:
|
||||
if (!EXT4_I(inode)->i_file_acl) {
|
||||
/* add xattr inode to orphan list */
|
||||
ext4_xattr_inode_orphan_add(handle, inode, credits,
|
||||
*lea_ino_array);
|
||||
goto cleanup;
|
||||
}
|
||||
bh = sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl);
|
||||
if (!bh) {
|
||||
EXT4_ERROR_INODE(inode, "block %llu read error",
|
||||
@ -1599,11 +2021,69 @@ ext4_xattr_delete_inode(handle_t *handle, struct inode *inode)
|
||||
EXT4_I(inode)->i_file_acl);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
for (entry = BFIRST(bh); !IS_LAST_ENTRY(entry);
|
||||
entry = EXT4_XATTR_NEXT(entry)) {
|
||||
if (!entry->e_value_inum)
|
||||
continue;
|
||||
if (ext4_expand_ino_array(lea_ino_array,
|
||||
entry->e_value_inum) != 0)
|
||||
goto cleanup;
|
||||
entry->e_value_inum = 0;
|
||||
}
|
||||
|
||||
/* add xattr inode to orphan list */
|
||||
error = ext4_xattr_inode_orphan_add(handle, inode, credits,
|
||||
*lea_ino_array);
|
||||
if (error != 0)
|
||||
goto cleanup;
|
||||
|
||||
if (!IS_NOQUOTA(inode))
|
||||
credits += 2 * EXT4_QUOTA_DEL_BLOCKS(inode->i_sb);
|
||||
|
||||
if (!ext4_handle_has_enough_credits(handle, credits)) {
|
||||
error = ext4_journal_extend(handle, credits);
|
||||
if (error > 0)
|
||||
error = ext4_journal_restart(handle, credits);
|
||||
if (error != 0) {
|
||||
ext4_warning(inode->i_sb,
|
||||
"couldn't extend journal (err %d)", error);
|
||||
goto cleanup;
|
||||
}
|
||||
}
|
||||
|
||||
ext4_xattr_release_block(handle, inode, bh);
|
||||
EXT4_I(inode)->i_file_acl = 0;
|
||||
|
||||
cleanup:
|
||||
brelse(bh);
|
||||
|
||||
return error;
|
||||
}
|
||||
|
||||
void
|
||||
ext4_xattr_inode_array_free(struct inode *inode,
|
||||
struct ext4_xattr_ino_array *lea_ino_array)
|
||||
{
|
||||
struct inode *ea_inode = NULL;
|
||||
int idx = 0;
|
||||
int err;
|
||||
|
||||
if (lea_ino_array == NULL)
|
||||
return;
|
||||
|
||||
for (; idx < lea_ino_array->xia_count; ++idx) {
|
||||
ea_inode = ext4_xattr_inode_iget(inode,
|
||||
lea_ino_array->xia_inodes[idx], &err);
|
||||
if (err)
|
||||
continue;
|
||||
/* for inode's i_count get from ext4_xattr_delete_inode */
|
||||
if (!list_empty(&EXT4_I(ea_inode)->i_orphan))
|
||||
iput(ea_inode);
|
||||
clear_nlink(ea_inode);
|
||||
iput(ea_inode);
|
||||
}
|
||||
kfree(lea_ino_array);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -1655,10 +2135,9 @@ ext4_xattr_cmp(struct ext4_xattr_header *header1,
|
||||
entry1->e_name_index != entry2->e_name_index ||
|
||||
entry1->e_name_len != entry2->e_name_len ||
|
||||
entry1->e_value_size != entry2->e_value_size ||
|
||||
entry1->e_value_inum != entry2->e_value_inum ||
|
||||
memcmp(entry1->e_name, entry2->e_name, entry1->e_name_len))
|
||||
return 1;
|
||||
if (entry1->e_value_block != 0 || entry2->e_value_block != 0)
|
||||
return -EFSCORRUPTED;
|
||||
if (memcmp((char *)header1 + le16_to_cpu(entry1->e_value_offs),
|
||||
(char *)header2 + le16_to_cpu(entry2->e_value_offs),
|
||||
le32_to_cpu(entry1->e_value_size)))
|
||||
@ -1730,7 +2209,7 @@ static inline void ext4_xattr_hash_entry(struct ext4_xattr_header *header,
|
||||
*name++;
|
||||
}
|
||||
|
||||
if (entry->e_value_size != 0) {
|
||||
if (!entry->e_value_inum && entry->e_value_size) {
|
||||
__le32 *value = (__le32 *)((char *)header +
|
||||
le16_to_cpu(entry->e_value_offs));
|
||||
for (n = (le32_to_cpu(entry->e_value_size) +
|
||||
|
||||
@ -44,7 +44,7 @@ struct ext4_xattr_entry {
|
||||
__u8 e_name_len; /* length of name */
|
||||
__u8 e_name_index; /* attribute name index */
|
||||
__le16 e_value_offs; /* offset in disk block of value */
|
||||
__le32 e_value_block; /* disk block attribute is stored on (n/i) */
|
||||
__le32 e_value_inum; /* inode in which the value is stored */
|
||||
__le32 e_value_size; /* size of attribute value */
|
||||
__le32 e_hash; /* hash value of name and value */
|
||||
char e_name[0]; /* attribute name */
|
||||
@ -69,6 +69,26 @@ struct ext4_xattr_entry {
|
||||
EXT4_I(inode)->i_extra_isize))
|
||||
#define IFIRST(hdr) ((struct ext4_xattr_entry *)((hdr)+1))
|
||||
|
||||
/*
|
||||
* Link EA inode back to parent one using i_mtime field.
|
||||
* Extra integer type conversion added to ignore higher
|
||||
* bits in i_mtime.tv_sec which might be set by ext4_get()
|
||||
*/
|
||||
#define EXT4_XATTR_INODE_SET_PARENT(inode, inum) \
|
||||
do { \
|
||||
(inode)->i_mtime.tv_sec = inum; \
|
||||
} while(0)
|
||||
|
||||
#define EXT4_XATTR_INODE_GET_PARENT(inode) \
|
||||
((__u32)(inode)->i_mtime.tv_sec)
|
||||
|
||||
/*
|
||||
* The minimum size of EA value when you start storing it in an external inode
|
||||
* size of block - size of header - size of 1 entry - 4 null bytes
|
||||
*/
|
||||
#define EXT4_XATTR_MIN_LARGE_EA_SIZE(b) \
|
||||
((b) - EXT4_XATTR_LEN(3) - sizeof(struct ext4_xattr_header) - 4)
|
||||
|
||||
#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)
|
||||
@ -77,10 +97,11 @@ struct ext4_xattr_entry {
|
||||
#define EXT4_ZERO_XATTR_VALUE ((void *)-1)
|
||||
|
||||
struct ext4_xattr_info {
|
||||
int name_index;
|
||||
const char *name;
|
||||
const void *value;
|
||||
size_t value_len;
|
||||
int name_index;
|
||||
int in_inode;
|
||||
};
|
||||
|
||||
struct ext4_xattr_search {
|
||||
@ -140,7 +161,13 @@ extern int ext4_xattr_get(struct inode *, int, const char *, void *, size_t);
|
||||
extern int ext4_xattr_set(struct inode *, int, const char *, const void *, size_t, int);
|
||||
extern int ext4_xattr_set_handle(handle_t *, struct inode *, int, const char *, const void *, size_t, int);
|
||||
|
||||
extern void ext4_xattr_delete_inode(handle_t *, struct inode *);
|
||||
extern struct inode *ext4_xattr_inode_iget(struct inode *parent, unsigned long ea_ino,
|
||||
int *err);
|
||||
extern int ext4_xattr_inode_unlink(struct inode *inode, unsigned long ea_ino);
|
||||
extern int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
|
||||
struct ext4_xattr_ino_array **array);
|
||||
extern void ext4_xattr_inode_array_free(struct inode *inode,
|
||||
struct ext4_xattr_ino_array *array);
|
||||
|
||||
extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
|
||||
struct ext4_inode *raw_inode, handle_t *handle);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user