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authorJoel Becker <joel.becker@oracle.com>2009-08-19 06:03:24 +0200
committerJoel Becker <joel.becker@oracle.com>2010-02-27 00:41:12 +0100
commitc5d95df5f78312c879f3058059c98a08821897a5 (patch)
treeae8b3549b50a664b1f48d8608488362a8597d9a5 /fs/ocfs2
parentocfs2: Gell into ocfs2_xa_set() (diff)
downloadlinux-c5d95df5f78312c879f3058059c98a08821897a5.tar.xz
linux-c5d95df5f78312c879f3058059c98a08821897a5.zip
ocfs2: Let ocfs2_xa_prepare_entry() do space checks.
ocfs2_xattr_set_in_bucket() doesn't need to do its own hacky space checking. Let's let ocfs2_xa_prepare_entry() (via ocfs2_xa_set()) do the more accurate work. Whenever it doesn't have space, ocfs2_xattr_set_in_bucket() can try to get more space. Signed-off-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2')
-rw-r--r--fs/ocfs2/xattr.c270
1 files changed, 93 insertions, 177 deletions
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 98c18fbfc289..e7630a77a6c8 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -322,14 +322,6 @@ static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb)
return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits);
}
-static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
-{
- u16 len = sb->s_blocksize -
- offsetof(struct ocfs2_xattr_header, xh_entries);
-
- return len / sizeof(struct ocfs2_xattr_entry);
-}
-
#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0))
@@ -5418,42 +5410,6 @@ out:
}
/*
- * Set the xattr name/value in the bucket specified in xs.
- */
-static int ocfs2_xattr_set_in_bucket(struct inode *inode,
- struct ocfs2_xattr_info *xi,
- struct ocfs2_xattr_search *xs,
- struct ocfs2_xattr_set_ctxt *ctxt)
-{
- int ret;
- u64 blkno;
- struct ocfs2_xa_loc loc;
-
- if (!xs->bucket->bu_bhs[1]) {
- blkno = bucket_blkno(xs->bucket);
- ocfs2_xattr_bucket_relse(xs->bucket);
- ret = ocfs2_read_xattr_bucket(xs->bucket, blkno);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- }
-
- ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
- xs->not_found ? NULL : xs->here);
- ret = ocfs2_xa_set(&loc, xi, ctxt);
- if (ret) {
- if (ret != -ENOSPC)
- mlog_errno(ret);
- goto out;
- }
- xs->here = loc.xl_entry;
-
-out:
- return ret;
-}
-
-/*
* check whether the xattr bucket is filled up with the same hash value.
* If we want to insert the xattr with the same hash, return -ENOSPC.
* If we want to insert a xattr with different hash value, go ahead
@@ -5481,156 +5437,116 @@ static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
return 0;
}
-static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
- struct ocfs2_xattr_info *xi,
- struct ocfs2_xattr_search *xs,
- struct ocfs2_xattr_set_ctxt *ctxt)
+/*
+ * Try to set the entry in the current bucket. If we fail, the caller
+ * will handle getting us another bucket.
+ */
+static int ocfs2_xattr_set_entry_bucket(struct inode *inode,
+ struct ocfs2_xattr_info *xi,
+ struct ocfs2_xattr_search *xs,
+ struct ocfs2_xattr_set_ctxt *ctxt)
{
- struct ocfs2_xattr_header *xh;
- struct ocfs2_xattr_entry *xe;
- u16 count, header_size, xh_free_start;
- int free, max_free, need, old;
- size_t value_size = 0;
- size_t blocksize = inode->i_sb->s_blocksize;
- int ret, allocation = 0;
-
- mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name);
-
-try_again:
- xh = xs->header;
- count = le16_to_cpu(xh->xh_count);
- xh_free_start = le16_to_cpu(xh->xh_free_start);
- header_size = sizeof(struct ocfs2_xattr_header) +
- count * sizeof(struct ocfs2_xattr_entry);
- max_free = OCFS2_XATTR_BUCKET_SIZE - header_size -
- le16_to_cpu(xh->xh_name_value_len) - OCFS2_XATTR_HEADER_GAP;
-
- mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size "
- "of %u which exceed block size\n",
- (unsigned long long)bucket_blkno(xs->bucket),
- header_size);
+ int ret;
+ struct ocfs2_xa_loc loc;
- if (xi->xi_value && xi->xi_value_len > OCFS2_XATTR_INLINE_SIZE)
- value_size = OCFS2_XATTR_ROOT_SIZE;
- else if (xi->xi_value)
- value_size = OCFS2_XATTR_SIZE(xi->xi_value_len);
+ mlog_entry("Set xattr %s in xattr bucket\n", xi->xi_name);
- if (xs->not_found)
- need = sizeof(struct ocfs2_xattr_entry) +
- OCFS2_XATTR_SIZE(xi->xi_name_len) + value_size;
- else {
- need = value_size + OCFS2_XATTR_SIZE(xi->xi_name_len);
+ ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
+ xs->not_found ? NULL : xs->here);
+ ret = ocfs2_xa_set(&loc, xi, ctxt);
+ if (!ret) {
+ xs->here = loc.xl_entry;
+ goto out;
+ }
+ if (ret != -ENOSPC) {
+ mlog_errno(ret);
+ goto out;
+ }
- /*
- * We only replace the old value if the new length is smaller
- * than the old one. Otherwise we will allocate new space in the
- * bucket to store it.
- */
- xe = xs->here;
- if (ocfs2_xattr_is_local(xe))
- old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size));
- else
- old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE);
+ /* Ok, we need space. Let's try defragmenting the bucket. */
+ ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
+ xs->bucket);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- if (old >= value_size)
- need = 0;
+ ret = ocfs2_xa_set(&loc, xi, ctxt);
+ if (!ret) {
+ xs->here = loc.xl_entry;
+ goto out;
}
+ if (ret != -ENOSPC)
+ mlog_errno(ret);
- free = xh_free_start - header_size - OCFS2_XATTR_HEADER_GAP;
- /*
- * We need to make sure the new name/value pair
- * can exist in the same block.
- */
- if (xh_free_start % blocksize < need)
- free -= xh_free_start % blocksize;
-
- mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, "
- "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len ="
- " %u\n", xs->not_found,
- (unsigned long long)bucket_blkno(xs->bucket),
- free, need, max_free, le16_to_cpu(xh->xh_free_start),
- le16_to_cpu(xh->xh_name_value_len));
-
- if (free < need ||
- (xs->not_found &&
- count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) {
- if (need <= max_free &&
- count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) {
- /*
- * We can create the space by defragment. Since only the
- * name/value will be moved, the xe shouldn't be changed
- * in xs.
- */
- ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle,
- xs->bucket);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
- xh_free_start = le16_to_cpu(xh->xh_free_start);
- free = xh_free_start - header_size
- - OCFS2_XATTR_HEADER_GAP;
- if (xh_free_start % blocksize < need)
- free -= xh_free_start % blocksize;
+out:
+ mlog_exit(ret);
+ return ret;
+}
- if (free >= need)
- goto xattr_set;
+static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
+ struct ocfs2_xattr_info *xi,
+ struct ocfs2_xattr_search *xs,
+ struct ocfs2_xattr_set_ctxt *ctxt)
+{
+ int ret;
- mlog(0, "Can't get enough space for xattr insert by "
- "defragment. Need %u bytes, but we have %d, so "
- "allocate new bucket for it.\n", need, free);
- }
+ mlog_entry("Set xattr %s in xattr index block\n", xi->xi_name);
- /*
- * We have to add new buckets or clusters and one
- * allocation should leave us enough space for insert.
- */
- BUG_ON(allocation);
+ ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
+ if (!ret)
+ goto out;
+ if (ret != -ENOSPC) {
+ mlog_errno(ret);
+ goto out;
+ }
- /*
- * We do not allow for overlapping ranges between buckets. And
- * the maximum number of collisions we will allow for then is
- * one bucket's worth, so check it here whether we need to
- * add a new bucket for the insert.
- */
- ret = ocfs2_check_xattr_bucket_collision(inode,
- xs->bucket,
- xi->xi_name);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
+ /* Ack, need more space. Let's try to get another bucket! */
- ret = ocfs2_add_new_xattr_bucket(inode,
- xs->xattr_bh,
+ /*
+ * We do not allow for overlapping ranges between buckets. And
+ * the maximum number of collisions we will allow for then is
+ * one bucket's worth, so check it here whether we need to
+ * add a new bucket for the insert.
+ */
+ ret = ocfs2_check_xattr_bucket_collision(inode,
xs->bucket,
- ctxt);
- if (ret) {
- mlog_errno(ret);
- goto out;
- }
+ xi->xi_name);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- /*
- * ocfs2_add_new_xattr_bucket() will have updated
- * xs->bucket if it moved, but it will not have updated
- * any of the other search fields. Thus, we drop it and
- * re-search. Everything should be cached, so it'll be
- * quick.
- */
- ocfs2_xattr_bucket_relse(xs->bucket);
- ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
- xi->xi_name_index,
- xi->xi_name, xs);
- if (ret && ret != -ENODATA)
- goto out;
- xs->not_found = ret;
- allocation = 1;
- goto try_again;
+ ret = ocfs2_add_new_xattr_bucket(inode,
+ xs->xattr_bh,
+ xs->bucket,
+ ctxt);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
}
-xattr_set:
- ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
+ /*
+ * ocfs2_add_new_xattr_bucket() will have updated
+ * xs->bucket if it moved, but it will not have updated
+ * any of the other search fields. Thus, we drop it and
+ * re-search. Everything should be cached, so it'll be
+ * quick.
+ */
+ ocfs2_xattr_bucket_relse(xs->bucket);
+ ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh,
+ xi->xi_name_index,
+ xi->xi_name, xs);
+ if (ret && ret != -ENODATA)
+ goto out;
+ xs->not_found = ret;
+
+ /* Ok, we have a new bucket, let's try again */
+ ret = ocfs2_xattr_set_entry_bucket(inode, xi, xs, ctxt);
+ if (ret && (ret != -ENOSPC))
+ mlog_errno(ret);
+
out:
mlog_exit(ret);
return ret;