summaryrefslogtreecommitdiffstats
path: root/fs/ext4
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ext4.h11
-rw-r--r--fs/ext4/ext4_jbd2.c10
-rw-r--r--fs/ext4/extents.c818
-rw-r--r--fs/ext4/extents_status.c28
-rw-r--r--fs/ext4/extents_status.h9
-rw-r--r--fs/ext4/inode.c120
-rw-r--r--fs/ext4/ioctl.c24
-rw-r--r--fs/ext4/mballoc.c7
-rw-r--r--fs/ext4/mballoc.h4
-rw-r--r--fs/ext4/move_extent.c5
-rw-r--r--fs/ext4/super.c40
-rw-r--r--fs/ext4/xattr.c59
-rw-r--r--fs/ext4/xattr.h6
13 files changed, 901 insertions, 240 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index d3a534fdc5ff..f1c65dc7cc0a 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -31,6 +31,7 @@
#include <linux/percpu_counter.h>
#include <linux/ratelimit.h>
#include <crypto/hash.h>
+#include <linux/falloc.h>
#ifdef __KERNEL__
#include <linux/compat.h>
#endif
@@ -567,6 +568,8 @@ enum {
#define EXT4_GET_BLOCKS_NO_LOCK 0x0100
/* Do not put hole in extent cache */
#define EXT4_GET_BLOCKS_NO_PUT_HOLE 0x0200
+ /* Convert written extents to unwritten */
+#define EXT4_GET_BLOCKS_CONVERT_UNWRITTEN 0x0400
/*
* The bit position of these flags must not overlap with any of the
@@ -998,6 +1001,8 @@ struct ext4_inode_info {
#define EXT4_MOUNT2_STD_GROUP_SIZE 0x00000002 /* We have standard group
size of blocksize * 8
blocks */
+#define EXT4_MOUNT2_HURD_COMPAT 0x00000004 /* Support HURD-castrated
+ file systems */
#define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \
~EXT4_MOUNT_##opt
@@ -1326,6 +1331,7 @@ struct ext4_sb_info {
struct list_head s_es_lru;
unsigned long s_es_last_sorted;
struct percpu_counter s_extent_cache_cnt;
+ struct mb_cache *s_mb_cache;
spinlock_t s_es_lru_lock ____cacheline_aligned_in_smp;
/* Ratelimit ext4 messages. */
@@ -2133,8 +2139,6 @@ extern int ext4_writepage_trans_blocks(struct inode *);
extern int ext4_chunk_trans_blocks(struct inode *, int nrblocks);
extern int ext4_block_truncate_page(handle_t *handle,
struct address_space *mapping, loff_t from);
-extern int ext4_block_zero_page_range(handle_t *handle,
- struct address_space *mapping, loff_t from, loff_t length);
extern int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
loff_t lstart, loff_t lend);
extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
@@ -2757,6 +2761,7 @@ extern int ext4_find_delalloc_cluster(struct inode *inode, ext4_lblk_t lblk);
extern int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len);
extern int ext4_ext_precache(struct inode *inode);
+extern int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len);
/* move_extent.c */
extern void ext4_double_down_write_data_sem(struct inode *first,
@@ -2766,6 +2771,8 @@ extern void ext4_double_up_write_data_sem(struct inode *orig_inode,
extern int ext4_move_extents(struct file *o_filp, struct file *d_filp,
__u64 start_orig, __u64 start_donor,
__u64 len, __u64 *moved_len);
+extern int mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
+ struct ext4_extent **extent);
/* page-io.c */
extern int __init ext4_init_pageio(void);
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index 3fe29de832c8..c3fb607413ed 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -259,6 +259,16 @@ int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
if (WARN_ON_ONCE(err)) {
ext4_journal_abort_handle(where, line, __func__, bh,
handle, err);
+ if (inode == NULL) {
+ pr_err("EXT4: jbd2_journal_dirty_metadata "
+ "failed: handle type %u started at "
+ "line %u, credits %u/%u, errcode %d",
+ handle->h_type,
+ handle->h_line_no,
+ handle->h_requested_credits,
+ handle->h_buffer_credits, err);
+ return err;
+ }
ext4_error_inode(inode, where, line,
bh->b_blocknr,
"journal_dirty_metadata failed: "
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 74bc2d549c58..82df3ce9874a 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -37,7 +37,6 @@
#include <linux/quotaops.h>
#include <linux/string.h>
#include <linux/slab.h>
-#include <linux/falloc.h>
#include <asm/uaccess.h>
#include <linux/fiemap.h>
#include "ext4_jbd2.h"
@@ -1691,7 +1690,7 @@ ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1,
* the extent that was written properly split out and conversion to
* initialized is trivial.
*/
- if (ext4_ext_is_uninitialized(ex1) || ext4_ext_is_uninitialized(ex2))
+ if (ext4_ext_is_uninitialized(ex1) != ext4_ext_is_uninitialized(ex2))
return 0;
ext1_ee_len = ext4_ext_get_actual_len(ex1);
@@ -1708,6 +1707,11 @@ ext4_can_extents_be_merged(struct inode *inode, struct ext4_extent *ex1,
*/
if (ext1_ee_len + ext2_ee_len > EXT_INIT_MAX_LEN)
return 0;
+ if (ext4_ext_is_uninitialized(ex1) &&
+ (ext4_test_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN) ||
+ atomic_read(&EXT4_I(inode)->i_unwritten) ||
+ (ext1_ee_len + ext2_ee_len > EXT_UNINIT_MAX_LEN)))
+ return 0;
#ifdef AGGRESSIVE_TEST
if (ext1_ee_len >= 4)
return 0;
@@ -1731,7 +1735,7 @@ static int ext4_ext_try_to_merge_right(struct inode *inode,
{
struct ext4_extent_header *eh;
unsigned int depth, len;
- int merge_done = 0;
+ int merge_done = 0, uninit;
depth = ext_depth(inode);
BUG_ON(path[depth].p_hdr == NULL);
@@ -1741,8 +1745,11 @@ static int ext4_ext_try_to_merge_right(struct inode *inode,
if (!ext4_can_extents_be_merged(inode, ex, ex + 1))
break;
/* merge with next extent! */
+ uninit = ext4_ext_is_uninitialized(ex);
ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)
+ ext4_ext_get_actual_len(ex + 1));
+ if (uninit)
+ ext4_ext_mark_uninitialized(ex);
if (ex + 1 < EXT_LAST_EXTENT(eh)) {
len = (EXT_LAST_EXTENT(eh) - ex - 1)
@@ -1896,7 +1903,7 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
struct ext4_ext_path *npath = NULL;
int depth, len, err;
ext4_lblk_t next;
- int mb_flags = 0;
+ int mb_flags = 0, uninit;
if (unlikely(ext4_ext_get_actual_len(newext) == 0)) {
EXT4_ERROR_INODE(inode, "ext4_ext_get_actual_len(newext) == 0");
@@ -1946,9 +1953,11 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
path + depth);
if (err)
return err;
-
+ uninit = ext4_ext_is_uninitialized(ex);
ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)
+ ext4_ext_get_actual_len(newext));
+ if (uninit)
+ ext4_ext_mark_uninitialized(ex);
eh = path[depth].p_hdr;
nearex = ex;
goto merge;
@@ -1971,10 +1980,13 @@ prepend:
if (err)
return err;
+ uninit = ext4_ext_is_uninitialized(ex);
ex->ee_block = newext->ee_block;
ext4_ext_store_pblock(ex, ext4_ext_pblock(newext));
ex->ee_len = cpu_to_le16(ext4_ext_get_actual_len(ex)
+ ext4_ext_get_actual_len(newext));
+ if (uninit)
+ ext4_ext_mark_uninitialized(ex);
eh = path[depth].p_hdr;
nearex = ex;
goto merge;
@@ -2585,6 +2597,27 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
ex_ee_block = le32_to_cpu(ex->ee_block);
ex_ee_len = ext4_ext_get_actual_len(ex);
+ /*
+ * If we're starting with an extent other than the last one in the
+ * node, we need to see if it shares a cluster with the extent to
+ * the right (towards the end of the file). If its leftmost cluster
+ * is this extent's rightmost cluster and it is not cluster aligned,
+ * we'll mark it as a partial that is not to be deallocated.
+ */
+
+ if (ex != EXT_LAST_EXTENT(eh)) {
+ ext4_fsblk_t current_pblk, right_pblk;
+ long long current_cluster, right_cluster;
+
+ current_pblk = ext4_ext_pblock(ex) + ex_ee_len - 1;
+ current_cluster = (long long)EXT4_B2C(sbi, current_pblk);
+ right_pblk = ext4_ext_pblock(ex + 1);
+ right_cluster = (long long)EXT4_B2C(sbi, right_pblk);
+ if (current_cluster == right_cluster &&
+ EXT4_PBLK_COFF(sbi, right_pblk))
+ *partial_cluster = -right_cluster;
+ }
+
trace_ext4_ext_rm_leaf(inode, start, ex, *partial_cluster);
while (ex >= EXT_FIRST_EXTENT(eh) &&
@@ -2710,10 +2743,15 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
err = ext4_ext_correct_indexes(handle, inode, path);
/*
- * Free the partial cluster only if the current extent does not
- * reference it. Otherwise we might free used cluster.
+ * If there's a partial cluster and at least one extent remains in
+ * the leaf, free the partial cluster if it isn't shared with the
+ * current extent. If there's a partial cluster and no extents
+ * remain in the leaf, it can't be freed here. It can only be
+ * freed when it's possible to determine if it's not shared with
+ * any other extent - when the next leaf is processed or when space
+ * removal is complete.
*/
- if (*partial_cluster > 0 &&
+ if (*partial_cluster > 0 && eh->eh_entries &&
(EXT4_B2C(sbi, ext4_ext_pblock(ex) + ex_ee_len - 1) !=
*partial_cluster)) {
int flags = get_default_free_blocks_flags(inode);
@@ -3569,6 +3607,8 @@ out:
* b> Splits in two extents: Write is happening at either end of the extent
* c> Splits in three extents: Somone is writing in middle of the extent
*
+ * This works the same way in the case of initialized -> unwritten conversion.
+ *
* One of more index blocks maybe needed if the extent tree grow after
* the uninitialized extent split. To prevent ENOSPC occur at the IO
* complete, we need to split the uninitialized extent before DIO submit
@@ -3579,7 +3619,7 @@ out:
*
* Returns the size of uninitialized extent to be written on success.
*/
-static int ext4_split_unwritten_extents(handle_t *handle,
+static int ext4_split_convert_extents(handle_t *handle,
struct inode *inode,
struct ext4_map_blocks *map,
struct ext4_ext_path *path,
@@ -3591,9 +3631,9 @@ static int ext4_split_unwritten_extents(handle_t *handle,
unsigned int ee_len;
int split_flag = 0, depth;
- ext_debug("ext4_split_unwritten_extents: inode %lu, logical"
- "block %llu, max_blocks %u\n", inode->i_ino,
- (unsigned long long)map->m_lblk, map->m_len);
+ ext_debug("%s: inode %lu, logical block %llu, max_blocks %u\n",
+ __func__, inode->i_ino,
+ (unsigned long long)map->m_lblk, map->m_len);
eof_block = (inode->i_size + inode->i_sb->s_blocksize - 1) >>
inode->i_sb->s_blocksize_bits;
@@ -3608,14 +3648,73 @@ static int ext4_split_unwritten_extents(handle_t *handle,
ee_block = le32_to_cpu(ex->ee_block);
ee_len = ext4_ext_get_actual_len(ex);
- split_flag |= ee_block + ee_len <= eof_block ? EXT4_EXT_MAY_ZEROOUT : 0;
- split_flag |= EXT4_EXT_MARK_UNINIT2;
- if (flags & EXT4_GET_BLOCKS_CONVERT)
- split_flag |= EXT4_EXT_DATA_VALID2;
+ /* Convert to unwritten */
+ if (flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN) {
+ split_flag |= EXT4_EXT_DATA_VALID1;
+ /* Convert to initialized */
+ } else if (flags & EXT4_GET_BLOCKS_CONVERT) {
+ split_flag |= ee_block + ee_len <= eof_block ?
+ EXT4_EXT_MAY_ZEROOUT : 0;
+ split_flag |= (EXT4_EXT_MARK_UNINIT2 | EXT4_EXT_DATA_VALID2);
+ }
flags |= EXT4_GET_BLOCKS_PRE_IO;
return ext4_split_extent(handle, inode, path, map, split_flag, flags);
}
+static int ext4_convert_initialized_extents(handle_t *handle,
+ struct inode *inode,
+ struct ext4_map_blocks *map,
+ struct ext4_ext_path *path)
+{
+ struct ext4_extent *ex;
+ ext4_lblk_t ee_block;
+ unsigned int ee_len;
+ int depth;
+ int err = 0;
+
+ depth = ext_depth(inode);
+ ex = path[depth].p_ext;
+ ee_block = le32_to_cpu(ex->ee_block);
+ ee_len = ext4_ext_get_actual_len(ex);
+
+ ext_debug("%s: inode %lu, logical"
+ "block %llu, max_blocks %u\n", __func__, inode->i_ino,
+ (unsigned long long)ee_block, ee_len);
+
+ if (ee_block != map->m_lblk || ee_len > map->m_len) {
+ err = ext4_split_convert_extents(handle, inode, map, path,
+ EXT4_GET_BLOCKS_CONVERT_UNWRITTEN);
+ if (err < 0)
+ goto out;
+ ext4_ext_drop_refs(path);
+ path = ext4_ext_find_extent(inode, map->m_lblk, path, 0);
+ if (IS_ERR(path)) {
+ err = PTR_ERR(path);
+ goto out;
+ }
+ depth = ext_depth(inode);
+ ex = path[depth].p_ext;
+ }
+
+ err = ext4_ext_get_access(handle, inode, path + depth);
+ if (err)
+ goto out;
+ /* first mark the extent as uninitialized */
+ ext4_ext_mark_uninitialized(ex);
+
+ /* note: ext4_ext_correct_indexes() isn't needed here because
+ * borders are not changed
+ */
+ ext4_ext_try_to_merge(handle, inode, path, ex);
+
+ /* Mark modified extent as dirty */
+ err = ext4_ext_dirty(handle, inode, path + path->p_depth);
+out:
+ ext4_ext_show_leaf(inode, path);
+ return err;
+}
+
+
static int ext4_convert_unwritten_extents_endio(handle_t *handle,
struct inode *inode,
struct ext4_map_blocks *map,
@@ -3649,8 +3748,8 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
inode->i_ino, (unsigned long long)ee_block, ee_len,
(unsigned long long)map->m_lblk, map->m_len);
#endif
- err = ext4_split_unwritten_extents(handle, inode, map, path,
- EXT4_GET_BLOCKS_CONVERT);
+ err = ext4_split_convert_extents(handle, inode, map, path,
+ EXT4_GET_BLOCKS_CONVERT);
if (err < 0)
goto out;
ext4_ext_drop_refs(path);
@@ -3851,6 +3950,38 @@ get_reserved_cluster_alloc(struct inode *inode, ext4_lblk_t lblk_start,
}
static int
+ext4_ext_convert_initialized_extent(handle_t *handle, struct inode *inode,
+ struct ext4_map_blocks *map,
+ struct ext4_ext_path *path, int flags,
+ unsigned int allocated, ext4_fsblk_t newblock)
+{
+ int ret = 0;
+ int err = 0;
+
+ /*
+ * Make sure that the extent is no bigger than we support with
+ * uninitialized extent
+ */
+ if (map->m_len > EXT_UNINIT_MAX_LEN)
+ map->m_len = EXT_UNINIT_MAX_LEN / 2;
+
+ ret = ext4_convert_initialized_extents(handle, inode, map,
+ path);
+ if (ret >= 0) {
+ ext4_update_inode_fsync_trans(handle, inode, 1);
+ err = check_eofblocks_fl(handle, inode, map->m_lblk,
+ path, map->m_len);
+ } else
+ err = ret;
+ map->m_flags |= EXT4_MAP_UNWRITTEN;
+ if (allocated > map->m_len)
+ allocated = map->m_len;
+ map->m_len = allocated;
+
+ return err ? err : allocated;
+}
+
+static int
ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
struct ext4_map_blocks *map,
struct ext4_ext_path *path, int flags,
@@ -3877,8 +4008,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
/* get_block() before submit the IO, split the extent */
if ((flags & EXT4_GET_BLOCKS_PRE_IO)) {
- ret = ext4_split_unwritten_extents(handle, inode, map,
- path, flags);
+ ret = ext4_split_convert_extents(handle, inode, map,
+ path, flags | EXT4_GET_BLOCKS_CONVERT);
if (ret <= 0)
goto out;
/*
@@ -3993,10 +4124,6 @@ out1:
map->m_pblk = newblock;
map->m_len = allocated;
out2:
- if (path) {
- ext4_ext_drop_refs(path);
- kfree(path);
- }
return err ? err : allocated;
}
@@ -4128,7 +4255,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
struct ext4_extent newex, *ex, *ex2;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_fsblk_t newblock = 0;
- int free_on_err = 0, err = 0, depth;
+ int free_on_err = 0, err = 0, depth, ret;
unsigned int allocated = 0, offset = 0;
unsigned int allocated_clusters = 0;
struct ext4_allocation_request ar;
@@ -4170,6 +4297,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
ext4_fsblk_t ee_start = ext4_ext_pblock(ex);
unsigned short ee_len;
+
/*
* Uninitialized extents are treated as holes, except that
* we split out initialized portions during a write.
@@ -4186,13 +4314,27 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
ext_debug("%u fit into %u:%d -> %llu\n", map->m_lblk,
ee_block, ee_len, newblock);
- if (!ext4_ext_is_uninitialized(ex))
+ /*
+ * If the extent is initialized check whether the
+ * caller wants to convert it to unwritten.
+ */
+ if ((!ext4_ext_is_uninitialized(ex)) &&
+ (flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN)) {
+ allocated = ext4_ext_convert_initialized_extent(
+ handle, inode, map, path, flags,
+ allocated, newblock);
+ goto out2;
+ } else if (!ext4_ext_is_uninitialized(ex))
goto out;
- allocated = ext4_ext_handle_uninitialized_extents(
+ ret = ext4_ext_handle_uninitialized_extents(
handle, inode, map, path, flags,
allocated, newblock);
- goto out3;
+ if (ret < 0)
+ err = ret;
+ else
+ allocated = ret;
+ goto out2;
}
}
@@ -4473,7 +4615,6 @@ out2:
kfree(path);
}
-out3:
trace_ext4_ext_map_blocks_exit(inode, flags, map,
err ? err : allocated);
ext4_es_lru_add(inode);
@@ -4514,34 +4655,200 @@ retry:
ext4_std_error(inode->i_sb, err);
}
-static void ext4_falloc_update_inode(struct inode *inode,
- int mode, loff_t new_size, int update_ctime)
+static int ext4_alloc_file_blocks(struct file *file, ext4_lblk_t offset,
+ ext4_lblk_t len, int flags, int mode)
{
- struct timespec now;
+ struct inode *inode = file_inode(file);
+ handle_t *handle;
+ int ret = 0;
+ int ret2 = 0;
+ int retries = 0;
+ struct ext4_map_blocks map;
+ unsigned int credits;
- if (update_ctime) {
- now = current_fs_time(inode->i_sb);
- if (!timespec_equal(&inode->i_ctime, &now))
- inode->i_ctime = now;
+ map.m_lblk = offset;
+ /*
+ * Don't normalize the request if it can fit in one extent so
+ * that it doesn't get unnecessarily split into multiple
+ * extents.
+ */
+ if (len <= EXT_UNINIT_MAX_LEN)
+ flags |= EXT4_GET_BLOCKS_NO_NORMALIZE;
+
+ /*
+ * credits to insert 1 extent into extent tree
+ */
+ credits = ext4_chunk_trans_blocks(inode, len);
+
+retry:
+ while (ret >= 0 && ret < len) {
+ map.m_lblk = map.m_lblk + ret;
+ map.m_len = len = len - ret;
+ handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS,
+ credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ break;
+ }
+ ret = ext4_map_blocks(handle, inode, &map, flags);
+ if (ret <= 0) {
+ ext4_debug("inode #%lu: block %u: len %u: "
+ "ext4_ext_map_blocks returned %d",
+ inode->i_ino, map.m_lblk,
+ map.m_len, ret);
+ ext4_mark_inode_dirty(handle, inode);
+ ret2 = ext4_journal_stop(handle);
+ break;
+ }
+ ret2 = ext4_journal_stop(handle);
+ if (ret2)
+ break;
+ }
+ if (ret == -ENOSPC &&
+ ext4_should_retry_alloc(inode->i_sb, &retries)) {
+ ret = 0;
+ goto retry;
}
+
+ return ret > 0 ? ret2 : ret;
+}
+
+static long ext4_zero_range(struct file *file, loff_t offset,
+ loff_t len, int mode)
+{
+ struct inode *inode = file_inode(file);
+ handle_t *handle = NULL;
+ unsigned int max_blocks;
+ loff_t new_size = 0;
+ int ret = 0;
+ int flags;
+ int partial;
+ loff_t start, end;
+ ext4_lblk_t lblk;
+ struct address_space *mapping = inode->i_mapping;
+ unsigned int blkbits = inode->i_blkbits;
+
+ trace_ext4_zero_range(inode, offset, len, mode);
+
+ /*
+ * Write out all dirty pages to avoid race conditions
+ * Then release them.
+ */
+ if (mapping->nrpages && mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) {
+ ret = filemap_write_and_wait_range(mapping, offset,
+ offset + len - 1);
+ if (ret)
+ return ret;
+ }
+
/*
- * Update only when preallocation was requested beyond
- * the file size.
+ * Round up offset. This is not fallocate, we neet to zero out
+ * blocks, so convert interior block aligned part of the range to
+ * unwritten and possibly manually zero out unaligned parts of the
+ * range.
*/
- if (!(mode & FALLOC_FL_KEEP_SIZE)) {
+ start = round_up(offset, 1 << blkbits);
+ end = round_down((offset + len), 1 << blkbits);
+
+ if (start < offset || end > offset + len)
+ return -EINVAL;
+ partial = (offset + len) & ((1 << blkbits) - 1);
+
+ lblk = start >> blkbits;
+ max_blocks = (end >> blkbits);
+ if (max_blocks < lblk)
+ max_blocks = 0;
+ else
+ max_blocks -= lblk;
+
+ flags = EXT4_GET_BLOCKS_CREATE_UNINIT_EXT |
+ EXT4_GET_BLOCKS_CONVERT_UNWRITTEN;
+ if (mode & FALLOC_FL_KEEP_SIZE)
+ flags |= EXT4_GET_BLOCKS_KEEP_SIZE;
+
+ mutex_lock(&inode->i_mutex);
+
+ /*
+ * Indirect files do not support unwritten extnets
+ */
+ if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
+ ret = -EOPNOTSUPP;
+ goto out_mutex;
+ }
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+ offset + len > i_size_read(inode)) {
+ new_size = offset + len;
+ ret = inode_newsize_ok(inode, new_size);
+ if (ret)
+ goto out_mutex;
+ /*
+ * If we have a partial block after EOF we have to allocate
+ * the entire block.
+ */
+ if (partial)
+ max_blocks += 1;
+ }
+
+ if (max_blocks > 0) {
+
+ /* Now release the pages and zero block aligned part of pages*/
+ truncate_pagecache_range(inode, start, end - 1);
+
+ /* Wait all existing dio workers, newcomers will block on i_mutex */
+ ext4_inode_block_unlocked_dio(inode);
+ inode_dio_wait(inode);
+
+ /*
+ * Remove entire range from the extent status tree.
+ */
+ ret = ext4_es_remove_extent(inode, lblk, max_blocks);
+ if (ret)
+ goto out_dio;
+
+ ret = ext4_alloc_file_blocks(file, lblk, max_blocks, flags,
+ mode);
+ if (ret)
+ goto out_dio;
+ }
+
+ handle = ext4_journal_start(inode, EXT4_HT_MISC, 4);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ ext4_std_error(inode->i_sb, ret);
+ goto out_dio;
+ }
+
+ inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+
+ if (new_size) {
if (new_size > i_size_read(inode))
i_size_write(inode, new_size);
if (new_size > EXT4_I(inode)->i_disksize)
ext4_update_i_disksize(inode, new_size);
} else {
/*
- * Mark that we allocate beyond EOF so the subsequent truncate
- * can proceed even if the new size is the same as i_size.
- */
- if (new_size > i_size_read(inode))
+ * Mark that we allocate beyond EOF so the subsequent truncate
+ * can proceed even if the new size is the same as i_size.
+ */
+ if ((offset + len) > i_size_read(inode))
ext4_set_inode_flag(inode, EXT4_INODE_EOFBLOCKS);
}
+ ext4_mark_inode_dirty(handle, inode);
+
+ /* Zero out partial block at the edges of the range */
+ ret = ext4_zero_partial_blocks(handle, inode, offset, len);
+
+ if (file->f_flags & O_SYNC)
+ ext4_handle_sync(handle);
+
+ ext4_journal_stop(handle);
+out_dio:
+ ext4_inode_resume_unlocked_dio(inode);
+out_mutex:
+ mutex_unlock(&inode->i_mutex);
+ return ret;
}
/*
@@ -4555,22 +4862,25 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
struct inode *inode = file_inode(file);
handle_t *handle;
- loff_t new_size;
+ loff_t new_size = 0;
unsigned int max_blocks;
int ret = 0;
- int ret2 = 0;
- int retries = 0;
int flags;
- struct ext4_map_blocks map;
- unsigned int credits, blkbits = inode->i_blkbits;
+ ext4_lblk_t lblk;
+ struct timespec tv;
+ unsigned int blkbits = inode->i_blkbits;
/* Return error if mode is not supported */
- if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+ if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+ FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE))
return -EOPNOTSUPP;
if (mode & FALLOC_FL_PUNCH_HOLE)
return ext4_punch_hole(inode, offset, len);
+ if (mode & FALLOC_FL_COLLAPSE_RANGE)
+ return ext4_collapse_range(inode, offset, len);
+
ret = ext4_convert_inline_data(inode);
if (ret)
return ret;
@@ -4582,83 +4892,66 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
return -EOPNOTSUPP;
+ if (mode & FALLOC_FL_ZERO_RANGE)
+ return ext4_zero_range(file, offset, len, mode);
+
trace_ext4_fallocate_enter(inode, offset, len, mode);
- map.m_lblk = offset >> blkbits;
+ lblk = offset >> blkbits;
/*
* We can't just convert len to max_blocks because
* If blocksize = 4096 offset = 3072 and len = 2048
*/
max_blocks = (EXT4_BLOCK_ALIGN(len + offset, blkbits) >> blkbits)
- - map.m_lblk;
- /*
- * credits to insert 1 extent into extent tree
- */
- credits = ext4_chunk_trans_blocks(inode, max_blocks);
- mutex_lock(&inode->i_mutex);
- ret = inode_newsize_ok(inode, (len + offset));
- if (ret) {
- mutex_unlock(&inode->i_mutex);
- trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
- return ret;
- }
+ - lblk;
+
flags = EXT4_GET_BLOCKS_CREATE_UNINIT_EXT;
if (mode & FALLOC_FL_KEEP_SIZE)
flags |= EXT4_GET_BLOCKS_KEEP_SIZE;
- /*
- * Don't normalize the request if it can fit in one extent so
- * that it doesn't get unnecessarily split into multiple
- * extents.
- */
- if (len <= EXT_UNINIT_MAX_LEN << blkbits)
- flags |= EXT4_GET_BLOCKS_NO_NORMALIZE;
-retry:
- while (ret >= 0 && ret < max_blocks) {
- map.m_lblk = map.m_lblk + ret;
- map.m_len = max_blocks = max_blocks - ret;
- handle = ext4_journal_start(inode, EXT4_HT_MAP_BLOCKS,
- credits);
- if (IS_ERR(handle)) {
- ret = PTR_ERR(handle);
- break;
- }
- ret = ext4_map_blocks(handle, inode, &map, flags);
- if (ret <= 0) {
-#ifdef EXT4FS_DEBUG
- ext4_warning(inode->i_sb,
- "inode #%lu: block %u: len %u: "
- "ext4_ext_map_blocks returned %d",
- inode->i_ino, map.m_lblk,
- map.m_len, ret);
-#endif
- ext4_mark_inode_dirty(handle, inode);
- ret2 = ext4_journal_stop(handle);
- break;
- }
- if ((map.m_lblk + ret) >= (EXT4_BLOCK_ALIGN(offset + len,
- blkbits) >> blkbits))
- new_size = offset + len;
- else
- new_size = ((loff_t) map.m_lblk + ret) << blkbits;
+ mutex_lock(&inode->i_mutex);
- ext4_falloc_update_inode(inode, mode, new_size,
- (map.m_flags & EXT4_MAP_NEW));
- ext4_mark_inode_dirty(handle, inode);
- if ((file->f_flags & O_SYNC) && ret >= max_blocks)
- ext4_handle_sync(handle);
- ret2 = ext4_journal_stop(handle);
- if (ret2)
- break;
+ if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+ offset + len > i_size_read(inode)) {
+ new_size = offset + len;
+ ret = inode_newsize_ok(inode, new_size);
+ if (ret)
+ goto out;
}
- if (ret == -ENOSPC &&
- ext4_should_retry_alloc(inode->i_sb, &retries)) {
- ret = 0;
- goto retry;
+
+ ret = ext4_alloc_file_blocks(file, lblk, max_blocks, flags, mode);
+ if (ret)
+ goto out;
+
+ handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
+ if (IS_ERR(handle))
+ goto out;
+
+ tv = inode->i_ctime = ext4_current_time(inode);
+
+ if (new_size) {
+ if (new_size > i_size_read(inode)) {
+ i_size_write(inode, new_size);
+ inode->i_mtime = tv;
+ }
+ if (new_size > EXT4_I(inode)->i_disksize)
+ ext4_update_i_disksize(inode, new_size);
+ } else {
+ /*
+ * Mark that we allocate beyond EOF so the subsequent truncate
+ * can proceed even if the new size is the same as i_size.
+ */
+ if ((offset + len) > i_size_read(inode))
+ ext4_set_inode_flag(inode, EXT4_INODE_EOFBLOCKS);
}
+ ext4_mark_inode_dirty(handle, inode);
+ if (file->f_flags & O_SYNC)
+ ext4_handle_sync(handle);
+
+ ext4_journal_stop(handle);
+out:
mutex_unlock(&inode->i_mutex);
- trace_ext4_fallocate_exit(inode, offset, max_blocks,
- ret > 0 ? ret2 : ret);
- return ret > 0 ? ret2 : ret;
+ trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
+ return ret;
}
/*
@@ -4869,3 +5162,304 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
ext4_es_lru_add(inode);
return error;
}
+
+/*
+ * ext4_access_path:
+ * Function to access the path buffer for marking it dirty.
+ * It also checks if there are sufficient credits left in the journal handle
+ * to update path.
+ */
+static int
+ext4_access_path(handle_t *handle, struct inode *inode,
+ struct ext4_ext_path *path)
+{
+ int credits, err;
+
+ if (!ext4_handle_valid(handle))
+ return 0;
+
+ /*
+ * Check if need to extend journal credits
+ * 3 for leaf, sb, and inode plus 2 (bmap and group
+ * descriptor) for each block group; assume two block
+ * groups
+ */
+ if (handle->h_buffer_credits < 7) {
+ credits = ext4_writepage_trans_blocks(inode);
+ err = ext4_ext_truncate_extend_restart(handle, inode, credits);
+ /* EAGAIN is success */
+ if (err && err != -EAGAIN)
+ return err;
+ }
+
+ err = ext4_ext_get_access(handle, inode, path);
+ return err;
+}
+
+/*
+ * ext4_ext_shift_path_extents:
+ * Shift the extents of a path structure lying between path[depth].p_ext
+ * and EXT_LAST_EXTENT(path[depth].p_hdr) downwards, by subtracting shift
+ * from starting block for each extent.
+ */
+static int
+ext4_ext_shift_path_extents(struct ext4_ext_path *path, ext4_lblk_t shift,
+ struct inode *inode, handle_t *handle,
+ ext4_lblk_t *start)
+{
+ int depth, err = 0;
+ struct ext4_extent *ex_start, *ex_last;
+ bool update = 0;
+ depth = path->p_depth;
+
+ while (depth >= 0) {
+ if (depth == path->p_depth) {
+ ex_start = path[depth].p_ext;
+ if (!ex_start)
+ return -EIO;
+
+ ex_last = EXT_LAST_EXTENT(path[depth].p_hdr);
+ if (!ex_last)
+ return -EIO;
+
+ err = ext4_access_path(handle, inode, path + depth);
+ if (err)
+ goto out;
+
+ if (ex_start == EXT_FIRST_EXTENT(path[depth].p_hdr))
+ update = 1;
+
+ *start = ex_last->ee_block +
+ ext4_ext_get_actual_len(ex_last);
+
+ while (ex_start <= ex_last) {
+ ex_start->ee_block -= shift;
+ if (ex_start >
+ EXT_FIRST_EXTENT(path[depth].p_hdr)) {
+ if (ext4_ext_try_to_merge_right(inode,
+ path, ex_start - 1))
+ ex_last--;
+ }
+ ex_start++;
+ }
+ err = ext4_ext_dirty(handle, inode, path + depth);
+ if (err)
+ goto out;
+
+ if (--depth < 0 || !update)
+ break;
+ }
+
+ /* Update index too */
+ err = ext4_access_path(handle, inode, path + depth);
+ if (err)
+ goto out;
+
+ path[depth].p_idx->ei_block -= shift;
+ err = ext4_ext_dirty(handle, inode, path + depth);
+ if (err)
+ goto out;
+
+ /* we are done if current index is not a starting index */
+ if (path[depth].p_idx != EXT_FIRST_INDEX(path[depth].p_hdr))
+ break;
+
+ depth--;
+ }
+
+out:
+ return err;
+}
+
+/*
+ * ext4_ext_shift_extents:
+ * All the extents which lies in the range from start to the last allocated
+ * block for the file are shifted downwards by shift blocks.
+ * On success, 0 is returned, error otherwise.
+ */
+static int
+ext4_ext_shift_extents(struct inode *inode, handle_t *handle,
+ ext4_lblk_t start, ext4_lblk_t shift)
+{
+ struct ext4_ext_path *path;
+ int ret = 0, depth;
+ struct ext4_extent *extent;
+ ext4_lblk_t stop_block, current_block;
+ ext4_lblk_t ex_start, ex_end;
+
+ /* Let path point to the last extent */
+ path = ext4_ext_find_extent(inode, EXT_MAX_BLOCKS - 1, NULL, 0);
+ if (IS_ERR(path))
+ return PTR_ERR(path);
+
+ depth = path->p_depth;
+ extent = path[depth].p_ext;
+ if (!extent) {
+ ext4_ext_drop_refs(path);
+ kfree(path);
+ return ret;
+ }
+
+ stop_block = extent->ee_block + ext4_ext_get_actual_len(extent);
+ ext4_ext_drop_refs(path);
+ kfree(path);
+
+ /* Nothing to shift, if hole is at the end of file */
+ if (start >= stop_block)
+ return ret;
+
+ /*
+ * Don't start shifting extents until we make sure the hole is big
+ * enough to accomodate the shift.
+ */
+ path = ext4_ext_find_extent(inode, start - 1, NULL, 0);
+ depth = path->p_depth;
+ extent = path[depth].p_ext;
+ ex_start = extent->ee_block;
+ ex_end = extent->ee_block + ext4_ext_get_actual_len(extent);
+ ext4_ext_drop_refs(path);
+ kfree(path);
+
+ if ((start == ex_start && shift > ex_start) ||
+ (shift > start - ex_end))
+ return -EINVAL;
+
+ /* Its safe to start updating extents */
+ while (start < stop_block) {
+ path = ext4_ext_find_extent(inode, start, NULL, 0);
+ if (IS_ERR(path))
+ return PTR_ERR(path);
+ depth = path->p_depth;
+ extent = path[depth].p_ext;
+ current_block = extent->ee_block;
+ if (start > current_block) {
+ /* Hole, move to the next extent */
+ ret = mext_next_extent(inode, path, &extent);
+ if (ret != 0) {
+ ext4_ext_drop_refs(path);
+ kfree(path);
+ if (ret == 1)
+ ret = 0;
+ break;
+ }
+ }
+ ret = ext4_ext_shift_path_extents(path, shift, inode,
+ handle, &start);
+ ext4_ext_drop_refs(path);
+ kfree(path);
+ if (ret)
+ break;
+ }
+
+ return ret;
+}
+
+/*
+ * ext4_collapse_range:
+ * This implements the fallocate's collapse range functionality for ext4
+ * Returns: 0 and non-zero on error.
+ */
+int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
+{
+ struct super_block *sb = inode->i_sb;
+ ext4_lblk_t punch_start, punch_stop;
+ handle_t *handle;
+ unsigned int credits;
+ loff_t new_size;
+ int ret;
+
+ BUG_ON(offset + len > i_size_read(inode));
+
+ /* Collapse range works only on fs block size aligned offsets. */
+ if (offset & (EXT4_BLOCK_SIZE(sb) - 1) ||
+ len & (EXT4_BLOCK_SIZE(sb) - 1))
+ return -EINVAL;
+
+ if (!S_ISREG(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ trace_ext4_collapse_range(inode, offset, len);
+
+ punch_start = offset >> EXT4_BLOCK_SIZE_BITS(sb);
+ punch_stop = (offset + len) >> EXT4_BLOCK_SIZE_BITS(sb);
+
+ /* Write out all dirty pages */
+ ret = filemap_write_and_wait_range(inode->i_mapping, offset, -1);
+ if (ret)
+ return ret;
+
+ /* Take mutex lock */
+ mutex_lock(&inode->i_mutex);
+
+ /* It's not possible punch hole on append only file */
+ if (IS_APPEND(inode) || IS_IMMUTABLE(inode)) {
+ ret = -EPERM;
+ goto out_mutex;
+ }
+
+ if (IS_SWAPFILE(inode)) {
+ ret = -ETXTBSY;
+ goto out_mutex;
+ }
+
+ /* Currently just for extent based files */
+ if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) {
+ ret = -EOPNOTSUPP;
+ goto out_mutex;
+ }
+
+ truncate_pagecache_range(inode, offset, -1);
+
+ /* Wait for existing dio to complete */
+ ext4_inode_block_unlocked_dio(inode);
+ inode_dio_wait(inode);
+
+ credits = ext4_writepage_trans_blocks(inode);
+ handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ goto out_dio;
+ }
+
+ down_write(&EXT4_I(inode)->i_data_sem);
+ ext4_discard_preallocations(inode);
+
+ ret = ext4_es_remove_extent(inode, punch_start,
+ EXT_MAX_BLOCKS - punch_start - 1);
+ if (ret) {
+ up_write(&EXT4_I(inode)->i_data_sem);
+ goto out_stop;
+ }
+
+ ret = ext4_ext_remove_space(inode, punch_start, punch_stop - 1);
+ if (ret) {
+ up_write(&EXT4_I(inode)->i_data_sem);
+ goto out_stop;
+ }
+
+ ret = ext4_ext_shift_extents(inode, handle, punch_stop,
+ punch_stop - punch_start);
+ if (ret) {
+ up_write(&EXT4_I(inode)->i_data_sem);
+ goto out_stop;
+ }
+
+ new_size = i_size_read(inode) - len;
+ truncate_setsize(inode, new_size);
+ EXT4_I(inode)->i_disksize = new_size;
+
+ ext4_discard_preallocations(inode);
+ up_write(&EXT4_I(inode)->i_data_sem);
+ if (IS_SYNC(inode))
+ ext4_handle_sync(handle);
+ inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
+ ext4_mark_inode_dirty(handle, inode);
+
+out_stop:
+ ext4_journal_stop(handle);
+out_dio:
+ ext4_inode_resume_unlocked_dio(inode);
+out_mutex:
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+}
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 3981ff783950..0a014a7194b2 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -184,7 +184,7 @@ static void ext4_es_print_tree(struct inode *inode)
while (node) {
struct extent_status *es;
es = rb_entry(node, struct extent_status, rb_node);
- printk(KERN_DEBUG " [%u/%u) %llu %llx",
+ printk(KERN_DEBUG " [%u/%u) %llu %x",
es->es_lblk, es->es_len,
ext4_es_pblock(es), ext4_es_status(es));
node = rb_next(node);
@@ -445,8 +445,8 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
pr_warn("ES insert assertion failed for "
"inode: %lu we can find an extent "
"at block [%d/%d/%llu/%c], but we "
- "want to add an delayed/hole extent "
- "[%d/%d/%llu/%llx]\n",
+ "want to add a delayed/hole extent "
+ "[%d/%d/%llu/%x]\n",
inode->i_ino, ee_block, ee_len,
ee_start, ee_status ? 'u' : 'w',
es->es_lblk, es->es_len,
@@ -486,8 +486,8 @@ static void ext4_es_insert_extent_ext_check(struct inode *inode,
if (!ext4_es_is_delayed(es) && !ext4_es_is_hole(es)) {
pr_warn("ES insert assertion failed for inode: %lu "
"can't find an extent at block %d but we want "
- "to add an written/unwritten extent "
- "[%d/%d/%llu/%llx]\n", inode->i_ino,
+ "to add a written/unwritten extent "
+ "[%d/%d/%llu/%x]\n", inode->i_ino,
es->es_lblk, es->es_lblk, es->es_len,
ext4_es_pblock(es), ext4_es_status(es));
}
@@ -524,7 +524,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
*/
pr_warn("ES insert assertion failed for inode: %lu "
"We can find blocks but we want to add a "
- "delayed/hole extent [%d/%d/%llu/%llx]\n",
+ "delayed/hole extent [%d/%d/%llu/%x]\n",
inode->i_ino, es->es_lblk, es->es_len,
ext4_es_pblock(es), ext4_es_status(es));
return;
@@ -554,7 +554,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
if (ext4_es_is_written(es)) {
pr_warn("ES insert assertion failed for inode: %lu "
"We can't find the block but we want to add "
- "an written extent [%d/%d/%llu/%llx]\n",
+ "a written extent [%d/%d/%llu/%x]\n",
inode->i_ino, es->es_lblk, es->es_len,
ext4_es_pblock(es), ext4_es_status(es));
return;
@@ -658,8 +658,7 @@ int ext4_es_insert_extent(struct inode *inode, ext4_lblk_t lblk,
newes.es_lblk = lblk;
newes.es_len = len;
- ext4_es_store_pblock(&newes, pblk);
- ext4_es_store_status(&newes, status);
+ ext4_es_store_pblock_status(&newes, pblk, status);
trace_ext4_es_insert_extent(inode, &newes);
ext4_es_insert_extent_check(inode, &newes);
@@ -699,8 +698,7 @@ void ext4_es_cache_extent(struct inode *inode, ext4_lblk_t lblk,
newes.es_lblk = lblk;
newes.es_len = len;
- ext4_es_store_pblock(&newes, pblk);
- ext4_es_store_status(&newes, status);
+ ext4_es_store_pblock_status(&newes, pblk, status);
trace_ext4_es_cache_extent(inode, &newes);
if (!len)
@@ -812,13 +810,13 @@ retry:
newes.es_lblk = end + 1;
newes.es_len = len2;
+ block = 0x7FDEADBEEF;
if (ext4_es_is_written(&orig_es) ||
- ext4_es_is_unwritten(&orig_es)) {
+ ext4_es_is_unwritten(&orig_es))
block = ext4_es_pblock(&orig_es) +
orig_es.es_len - len2;
- ext4_es_store_pblock(&newes, block);
- }
- ext4_es_store_status(&newes, ext4_es_status(&orig_es));
+ ext4_es_store_pblock_status(&newes, block,
+ ext4_es_status(&orig_es));
err = __es_insert_extent(inode, &newes);
if (err) {
es->es_lblk = orig_es.es_lblk;
diff --git a/fs/ext4/extents_status.h b/fs/ext4/extents_status.h
index 167f4ab8ecc3..f1b62a419920 100644
--- a/fs/ext4/extents_status.h
+++ b/fs/ext4/extents_status.h
@@ -129,6 +129,15 @@ static inline void ext4_es_store_status(struct extent_status *es,
(es->es_pblk & ~ES_MASK));
}
+static inline void ext4_es_store_pblock_status(struct extent_status *es,
+ ext4_fsblk_t pb,
+ unsigned int status)
+{
+ es->es_pblk = (((ext4_fsblk_t)
+ (status & EXTENT_STATUS_FLAGS) << ES_SHIFT) |
+ (pb & ~ES_MASK));
+}
+
extern void ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_lru_add(struct inode *inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 175c3f933816..5b0d2c7d5408 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -504,6 +504,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
{
struct extent_status es;
int retval;
+ int ret = 0;
#ifdef ES_AGGRESSIVE_TEST
struct ext4_map_blocks orig_map;
@@ -515,6 +516,12 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
"logical block %lu\n", inode->i_ino, flags, map->m_len,
(unsigned long) map->m_lblk);
+ /*
+ * ext4_map_blocks returns an int, and m_len is an unsigned int
+ */
+ if (unlikely(map->m_len > INT_MAX))
+ map->m_len = INT_MAX;
+
/* Lookup extent status tree firstly */
if (ext4_es_lookup_extent(inode, map->m_lblk, &es)) {
ext4_es_lru_add(inode);
@@ -553,7 +560,6 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
EXT4_GET_BLOCKS_KEEP_SIZE);
}
if (retval > 0) {
- int ret;
unsigned int status;
if (unlikely(retval != map->m_len)) {
@@ -580,7 +586,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
found:
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
- int ret = check_block_validity(inode, map);
+ ret = check_block_validity(inode, map);
if (ret != 0)
return ret;
}
@@ -597,7 +603,13 @@ found:
* with buffer head unmapped.
*/
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED)
- return retval;
+ /*
+ * If we need to convert extent to unwritten
+ * we continue and do the actual work in
+ * ext4_ext_map_blocks()
+ */
+ if (!(flags & EXT4_GET_BLOCKS_CONVERT_UNWRITTEN))
+ return retval;
/*
* Here we clear m_flags because after allocating an new extent,
@@ -653,7 +665,6 @@ found:
ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);
if (retval > 0) {
- int ret;
unsigned int status;
if (unlikely(retval != map->m_len)) {
@@ -688,7 +699,7 @@ found:
has_zeroout:
up_write((&EXT4_I(inode)->i_data_sem));
if (retval > 0 && map->m_flags & EXT4_MAP_MAPPED) {
- int ret = check_block_validity(inode, map);
+ ret = check_block_validity(inode, map);
if (ret != 0)
return ret;
}
@@ -3313,33 +3324,13 @@ void ext4_set_aops(struct inode *inode)
}
/*
- * ext4_block_truncate_page() zeroes out a mapping from file offset `from'
- * up to the end of the block which corresponds to `from'.
- * This required during truncate. We need to physically zero the tail end
- * of that block so it doesn't yield old data if the file is later grown.
- */
-int ext4_block_truncate_page(handle_t *handle,
- struct address_space *mapping, loff_t from)
-{
- unsigned offset = from & (PAGE_CACHE_SIZE-1);
- unsigned length;
- unsigned blocksize;
- struct inode *inode = mapping->host;
-
- blocksize = inode->i_sb->s_blocksize;
- length = blocksize - (offset & (blocksize - 1));
-
- return ext4_block_zero_page_range(handle, mapping, from, length);
-}
-
-/*
* ext4_block_zero_page_range() zeros out a mapping of length 'length'
* starting from file offset 'from'. The range to be zero'd must
* be contained with in one block. If the specified range exceeds
* the end of the block it will be shortened to end of the block
* that cooresponds to 'from'
*/
-int ext4_block_zero_page_range(handle_t *handle,
+static int ext4_block_zero_page_range(handle_t *handle,
struct address_space *mapping, loff_t from, loff_t length)
{
ext4_fsblk_t index = from >> PAGE_CACHE_SHIFT;
@@ -3429,6 +3420,26 @@ unlock:
return err;
}
+/*
+ * ext4_block_truncate_page() zeroes out a mapping from file offset `from'
+ * up to the end of the block which corresponds to `from'.
+ * This required during truncate. We need to physically zero the tail end
+ * of that block so it doesn't yield old data if the file is later grown.
+ */
+int ext4_block_truncate_page(handle_t *handle,
+ struct address_space *mapping, loff_t from)
+{
+ unsigned offset = from & (PAGE_CACHE_SIZE-1);
+ unsigned length;
+ unsigned blocksize;
+ struct inode *inode = mapping->host;
+
+ blocksize = inode->i_sb->s_blocksize;
+ length = blocksize - (offset & (blocksize - 1));
+
+ return ext4_block_zero_page_range(handle, mapping, from, length);
+}
+
int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,
loff_t lstart, loff_t length)
{
@@ -3502,7 +3513,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
if (!S_ISREG(inode->i_mode))
return -EOPNOTSUPP;
- trace_ext4_punch_hole(inode, offset, length);
+ trace_ext4_punch_hole(inode, offset, length, 0);
/*
* Write out all dirty pages to avoid race conditions
@@ -3609,6 +3620,12 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
up_write(&EXT4_I(inode)->i_data_sem);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
+
+ /* Now release the pages again to reduce race window */
+ if (last_block_offset > first_block_offset)
+ truncate_pagecache_range(inode, first_block_offset,
+ last_block_offset);
+
inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
ext4_mark_inode_dirty(handle, inode);
out_stop:
@@ -3682,7 +3699,7 @@ void ext4_truncate(struct inode *inode)
/*
* There is a possibility that we're either freeing the inode
- * or it completely new indode. In those cases we might not
+ * or it's a completely new inode. In those cases we might not
* have i_mutex locked because it's not necessary.
*/
if (!(inode->i_state & (I_NEW|I_FREEING)))
@@ -3934,8 +3951,8 @@ void ext4_set_inode_flags(struct inode *inode)
new_fl |= S_NOATIME;
if (flags & EXT4_DIRSYNC_FL)
new_fl |= S_DIRSYNC;
- set_mask_bits(&inode->i_flags,
- S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl);
+ inode_set_flags(inode, new_fl,
+ S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
}
/* Propagate flags from i_flags to EXT4_I(inode)->i_flags */
@@ -4154,11 +4171,13 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
EXT4_INODE_GET_XTIME(i_atime, inode, raw_inode);
EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
- inode->i_version = le32_to_cpu(raw_inode->i_disk_version);
- if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
- if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
- inode->i_version |=
- (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
+ if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
+ inode->i_version = le32_to_cpu(raw_inode->i_disk_version);
+ if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
+ if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
+ inode->i_version |=
+ (__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
+ }
}
ret = 0;
@@ -4328,8 +4347,7 @@ static int ext4_do_update_inode(handle_t *handle,
goto out_brelse;
raw_inode->i_dtime = cpu_to_le32(ei->i_dtime);
raw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);
- if (EXT4_SB(inode->i_sb)->s_es->s_creator_os !=
- cpu_to_le32(EXT4_OS_HURD))
+ if (likely(!test_opt2(inode->i_sb, HURD_COMPAT)))
raw_inode->i_file_acl_high =
cpu_to_le16(ei->i_file_acl >> 32);
raw_inode->i_file_acl_lo = cpu_to_le32(ei->i_file_acl);
@@ -4374,12 +4392,15 @@ static int ext4_do_update_inode(handle_t *handle,
raw_inode->i_block[block] = ei->i_data[block];
}
- raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
- if (ei->i_extra_isize) {
- if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
- raw_inode->i_version_hi =
- cpu_to_le32(inode->i_version >> 32);
- raw_inode->i_extra_isize = cpu_to_le16(ei->i_extra_isize);
+ if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
+ raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
+ if (ei->i_extra_isize) {
+ if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
+ raw_inode->i_version_hi =
+ cpu_to_le32(inode->i_version >> 32);
+ raw_inode->i_extra_isize =
+ cpu_to_le16(ei->i_extra_isize);
+ }
}
ext4_inode_csum_set(inode, raw_inode, ei);
@@ -4446,7 +4467,12 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
return -EIO;
}
- if (wbc->sync_mode != WB_SYNC_ALL)
+ /*
+ * No need to force transaction in WB_SYNC_NONE mode. Also
+ * ext4_sync_fs() will force the commit after everything is
+ * written.
+ */
+ if (wbc->sync_mode != WB_SYNC_ALL || wbc->for_sync)
return 0;
err = ext4_force_commit(inode->i_sb);
@@ -4456,7 +4482,11 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
err = __ext4_get_inode_loc(inode, &iloc, 0);
if (err)
return err;
- if (wbc->sync_mode == WB_SYNC_ALL)
+ /*
+ * sync(2) will flush the whole buffer cache. No need to do
+ * it here separately for each inode.
+ */
+ if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)
sync_dirty_buffer(iloc.bh);
if (buffer_req(iloc.bh) && !buffer_uptodate(iloc.bh)) {
EXT4_ERROR_INODE_BLOCK(inode, iloc.bh->b_blocknr,
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index a2a837f00407..0f2252ec274d 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -104,21 +104,15 @@ static long swap_inode_boot_loader(struct super_block *sb,
struct ext4_inode_info *ei_bl;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) {
- err = -EINVAL;
- goto swap_boot_out;
- }
+ if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode))
+ return -EINVAL;
- if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
- err = -EPERM;
- goto swap_boot_out;
- }
+ if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
+ return -EPERM;
inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO);
- if (IS_ERR(inode_bl)) {
- err = PTR_ERR(inode_bl);
- goto swap_boot_out;
- }
+ if (IS_ERR(inode_bl))
+ return PTR_ERR(inode_bl);
ei_bl = EXT4_I(inode_bl);
filemap_flush(inode->i_mapping);
@@ -193,20 +187,14 @@ static long swap_inode_boot_loader(struct super_block *sb,
ext4_mark_inode_dirty(handle, inode);
}
}
-
ext4_journal_stop(handle);
-
ext4_double_up_write_data_sem(inode, inode_bl);
journal_err_out:
ext4_inode_resume_unlocked_dio(inode);
ext4_inode_resume_unlocked_dio(inode_bl);
-
unlock_two_nondirectories(inode, inode_bl);
-
iput(inode_bl);
-
-swap_boot_out:
return err;
}
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 04a5c7504be9..a888cac76e9c 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1808,6 +1808,7 @@ int ext4_mb_find_by_goal(struct ext4_allocation_context *ac,
ext4_lock_group(ac->ac_sb, group);
max = mb_find_extent(e4b, ac->ac_g_ex.fe_start,
ac->ac_g_ex.fe_len, &ex);
+ ex.fe_logical = 0xDEADFA11; /* debug value */
if (max >= ac->ac_g_ex.fe_len && ac->ac_g_ex.fe_len == sbi->s_stripe) {
ext4_fsblk_t start;
@@ -1936,7 +1937,7 @@ void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac,
*/
break;
}
-
+ ex.fe_logical = 0xDEADC0DE; /* debug value */
ext4_mb_measure_extent(ac, &ex, e4b);
i += ex.fe_len;
@@ -1977,6 +1978,7 @@ void ext4_mb_scan_aligned(struct ext4_allocation_context *ac,
max = mb_find_extent(e4b, i, sbi->s_stripe, &ex);
if (max >= sbi->s_stripe) {
ac->ac_found++;
+ ex.fe_logical = 0xDEADF00D; /* debug value */
ac->ac_b_ex = ex;
ext4_mb_use_best_found(ac, e4b);
break;
@@ -4006,8 +4008,7 @@ static void ext4_mb_show_ac(struct ext4_allocation_context *ac)
(unsigned long)ac->ac_b_ex.fe_len,
(unsigned long)ac->ac_b_ex.fe_logical,
(int)ac->ac_criteria);
- ext4_msg(ac->ac_sb, KERN_ERR, "%lu scanned, %d found",
- ac->ac_ex_scanned, ac->ac_found);
+ ext4_msg(ac->ac_sb, KERN_ERR, "%d found", ac->ac_found);
ext4_msg(ac->ac_sb, KERN_ERR, "groups: ");
ngroups = ext4_get_groups_count(sb);
for (i = 0; i < ngroups; i++) {
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 08481ee84cd5..d634e183b4d4 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -48,7 +48,7 @@ extern ushort ext4_mballoc_debug;
} \
} while (0)
#else
-#define mb_debug(n, fmt, a...)
+#define mb_debug(n, fmt, a...) no_printk(fmt, ## a)
#endif
#define EXT4_MB_HISTORY_ALLOC 1 /* allocation */
@@ -175,8 +175,6 @@ struct ext4_allocation_context {
/* copy of the best found extent taken before preallocation efforts */
struct ext4_free_extent ac_f_ex;
- /* number of iterations done. we have to track to limit searching */
- unsigned long ac_ex_scanned;
__u16 ac_groups_scanned;
__u16 ac_found;
__u16 ac_tail;
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 773b503bd18c..58ee7dc87669 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -76,7 +76,7 @@ copy_extent_status(struct ext4_extent *src, struct ext4_extent *dest)
* ext4_ext_path structure refers to the last extent, or a negative error
* value on failure.
*/
-static int
+int
mext_next_extent(struct inode *inode, struct ext4_ext_path *path,
struct ext4_extent **extent)
{
@@ -861,8 +861,7 @@ mext_page_mkuptodate(struct page *page, unsigned from, unsigned to)
}
if (!buffer_mapped(bh)) {
zero_user(page, block_start, blocksize);
- if (!err)
- set_buffer_uptodate(bh);
+ set_buffer_uptodate(bh);
continue;
}
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 710fed2377d4..f3c667091618 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -59,6 +59,7 @@ static struct kset *ext4_kset;
static struct ext4_lazy_init *ext4_li_info;
static struct mutex ext4_li_mtx;
static struct ext4_features *ext4_feat;
+static int ext4_mballoc_ready;
static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
@@ -845,6 +846,10 @@ static void ext4_put_super(struct super_block *sb)
invalidate_bdev(sbi->journal_bdev);
ext4_blkdev_remove(sbi);
}
+ if (sbi->s_mb_cache) {
+ ext4_xattr_destroy_cache(sbi->s_mb_cache);
+ sbi->s_mb_cache = NULL;
+ }
if (sbi->s_mmp_tsk)
kthread_stop(sbi->s_mmp_tsk);
sb->s_fs_info = NULL;
@@ -940,7 +945,7 @@ static void init_once(void *foo)
inode_init_once(&ei->vfs_inode);
}
-static int init_inodecache(void)
+static int __init init_inodecache(void)
{
ext4_inode_cachep = kmem_cache_create("ext4_inode_cache",
sizeof(struct ext4_inode_info),
@@ -3575,6 +3580,16 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
"feature flags set on rev 0 fs, "
"running e2fsck is recommended");
+ if (es->s_creator_os == cpu_to_le32(EXT4_OS_HURD)) {
+ set_opt2(sb, HURD_COMPAT);
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb,
+ EXT4_FEATURE_INCOMPAT_64BIT)) {
+ ext4_msg(sb, KERN_ERR,
+ "The Hurd can't support 64-bit file systems");
+ goto failed_mount;
+ }
+ }
+
if (IS_EXT2_SB(sb)) {
if (ext2_feature_set_ok(sb))
ext4_msg(sb, KERN_INFO, "mounting ext2 file system "
@@ -4010,6 +4025,14 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
percpu_counter_set(&sbi->s_dirtyclusters_counter, 0);
no_journal:
+ if (ext4_mballoc_ready) {
+ sbi->s_mb_cache = ext4_xattr_create_cache(sb->s_id);
+ if (!sbi->s_mb_cache) {
+ ext4_msg(sb, KERN_ERR, "Failed to create an mb_cache");
+ goto failed_mount_wq;
+ }
+ }
+
/*
* Get the # of file system overhead blocks from the
* superblock if present.
@@ -4835,6 +4858,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
}
if (*flags & MS_RDONLY) {
+ err = sync_filesystem(sb);
+ if (err < 0)
+ goto restore_opts;
err = dquot_suspend(sb, -1);
if (err < 0)
goto restore_opts;
@@ -5516,11 +5542,9 @@ static int __init ext4_init_fs(void)
err = ext4_init_mballoc();
if (err)
- goto out3;
-
- err = ext4_init_xattr();
- if (err)
goto out2;
+ else
+ ext4_mballoc_ready = 1;
err = init_inodecache();
if (err)
goto out1;
@@ -5536,10 +5560,9 @@ out:
unregister_as_ext3();
destroy_inodecache();
out1:
- ext4_exit_xattr();
-out2:
+ ext4_mballoc_ready = 0;
ext4_exit_mballoc();
-out3:
+out2:
ext4_exit_feat_adverts();
out4:
if (ext4_proc_root)
@@ -5562,7 +5585,6 @@ static void __exit ext4_exit_fs(void)
unregister_as_ext3();
unregister_filesystem(&ext4_fs_type);
destroy_inodecache();
- ext4_exit_xattr();
ext4_exit_mballoc();
ext4_exit_feat_adverts();
remove_proc_entry("fs/ext4", NULL);
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index e175e94116ac..1f5cf5880718 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -81,7 +81,7 @@
# define ea_bdebug(bh, fmt, ...) no_printk(fmt, ##__VA_ARGS__)
#endif
-static void ext4_xattr_cache_insert(struct buffer_head *);
+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 **);
@@ -90,8 +90,6 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *,
static int ext4_xattr_list(struct dentry *dentry, char *buffer,
size_t buffer_size);
-static struct mb_cache *ext4_xattr_cache;
-
static const struct xattr_handler *ext4_xattr_handler_map[] = {
[EXT4_XATTR_INDEX_USER] = &ext4_xattr_user_handler,
#ifdef CONFIG_EXT4_FS_POSIX_ACL
@@ -117,6 +115,9 @@ 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)
+
static __le32 ext4_xattr_block_csum(struct inode *inode,
sector_t block_nr,
struct ext4_xattr_header *hdr)
@@ -265,6 +266,7 @@ 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);
ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
name_index, name, buffer, (long)buffer_size);
@@ -286,7 +288,7 @@ bad_block:
error = -EIO;
goto cleanup;
}
- ext4_xattr_cache_insert(bh);
+ ext4_xattr_cache_insert(ext4_mb_cache, bh);
entry = BFIRST(bh);
error = ext4_xattr_find_entry(&entry, name_index, name, bh->b_size, 1);
if (error == -EIO)
@@ -409,6 +411,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
struct inode *inode = dentry->d_inode;
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);
@@ -430,7 +433,7 @@ ext4_xattr_block_list(struct dentry *dentry, char *buffer, size_t buffer_size)
error = -EIO;
goto cleanup;
}
- ext4_xattr_cache_insert(bh);
+ ext4_xattr_cache_insert(ext4_mb_cache, bh);
error = ext4_xattr_list_entries(dentry, BFIRST(bh), buffer, buffer_size);
cleanup:
@@ -526,8 +529,9 @@ ext4_xattr_release_block(handle_t *handle, struct inode *inode,
{
struct mb_cache_entry *ce = NULL;
int error = 0;
+ struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
- ce = mb_cache_entry_get(ext4_xattr_cache, bh->b_bdev, bh->b_blocknr);
+ ce = mb_cache_entry_get(ext4_mb_cache, bh->b_bdev, bh->b_blocknr);
error = ext4_journal_get_write_access(handle, bh);
if (error)
goto out;
@@ -567,12 +571,13 @@ static size_t ext4_xattr_free_space(struct ext4_xattr_entry *last,
size_t *min_offs, void *base, int *total)
{
for (; !IS_LAST_ENTRY(last); last = EXT4_XATTR_NEXT(last)) {
- *total += EXT4_XATTR_LEN(last->e_name_len);
if (!last->e_value_block && last->e_value_size) {
size_t offs = le16_to_cpu(last->e_value_offs);
if (offs < *min_offs)
*min_offs = offs;
}
+ if (total)
+ *total += EXT4_XATTR_LEN(last->e_name_len);
}
return (*min_offs - ((void *)last - base) - sizeof(__u32));
}
@@ -745,13 +750,14 @@ ext4_xattr_block_set(handle_t *handle, struct inode *inode,
struct ext4_xattr_search *s = &bs->s;
struct mb_cache_entry *ce = NULL;
int error = 0;
+ struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
#define header(x) ((struct ext4_xattr_header *)(x))
if (i->value && i->value_len > sb->s_blocksize)
return -ENOSPC;
if (s->base) {
- ce = mb_cache_entry_get(ext4_xattr_cache, bs->bh->b_bdev,
+ ce = mb_cache_entry_get(ext4_mb_cache, bs->bh->b_bdev,
bs->bh->b_blocknr);
error = ext4_journal_get_write_access(handle, bs->bh);
if (error)
@@ -769,7 +775,8 @@ 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(bs->bh);
+ ext4_xattr_cache_insert(ext4_mb_cache,
+ bs->bh);
}
unlock_buffer(bs->bh);
if (error == -EIO)
@@ -905,7 +912,7 @@ getblk_failed:
memcpy(new_bh->b_data, s->base, new_bh->b_size);
set_buffer_uptodate(new_bh);
unlock_buffer(new_bh);
- ext4_xattr_cache_insert(new_bh);
+ ext4_xattr_cache_insert(ext4_mb_cache, new_bh);
error = ext4_handle_dirty_xattr_block(handle,
inode, new_bh);
if (error)
@@ -1228,7 +1235,7 @@ int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
struct ext4_xattr_block_find *bs = NULL;
char *buffer = NULL, *b_entry_name = NULL;
size_t min_offs, free;
- int total_ino, total_blk;
+ int total_ino;
void *base, *start, *end;
int extra_isize = 0, error = 0, tried_min_extra_isize = 0;
int s_min_extra_isize = le16_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_min_extra_isize);
@@ -1286,8 +1293,7 @@ retry:
first = BFIRST(bh);
end = bh->b_data + bh->b_size;
min_offs = end - base;
- free = ext4_xattr_free_space(first, &min_offs, base,
- &total_blk);
+ free = ext4_xattr_free_space(first, &min_offs, base, NULL);
if (free < new_extra_isize) {
if (!tried_min_extra_isize && s_min_extra_isize) {
tried_min_extra_isize++;
@@ -1495,13 +1501,13 @@ ext4_xattr_put_super(struct super_block *sb)
* Returns 0, or a negative error number on failure.
*/
static void
-ext4_xattr_cache_insert(struct buffer_head *bh)
+ext4_xattr_cache_insert(struct mb_cache *ext4_mb_cache, struct buffer_head *bh)
{
__u32 hash = le32_to_cpu(BHDR(bh)->h_hash);
struct mb_cache_entry *ce;
int error;
- ce = mb_cache_entry_alloc(ext4_xattr_cache, GFP_NOFS);
+ ce = mb_cache_entry_alloc(ext4_mb_cache, GFP_NOFS);
if (!ce) {
ea_bdebug(bh, "out of memory");
return;
@@ -1573,12 +1579,13 @@ ext4_xattr_cache_find(struct inode *inode, struct ext4_xattr_header *header,
{
__u32 hash = le32_to_cpu(header->h_hash);
struct mb_cache_entry *ce;
+ struct mb_cache *ext4_mb_cache = EXT4_GET_MB_CACHE(inode);
if (!header->h_hash)
return NULL; /* never share */
ea_idebug(inode, "looking for cached blocks [%x]", (int)hash);
again:
- ce = mb_cache_entry_find_first(ext4_xattr_cache, inode->i_sb->s_bdev,
+ ce = mb_cache_entry_find_first(ext4_mb_cache, inode->i_sb->s_bdev,
hash);
while (ce) {
struct buffer_head *bh;
@@ -1676,19 +1683,17 @@ static void ext4_xattr_rehash(struct ext4_xattr_header *header,
#undef BLOCK_HASH_SHIFT
-int __init
-ext4_init_xattr(void)
+#define HASH_BUCKET_BITS 10
+
+struct mb_cache *
+ext4_xattr_create_cache(char *name)
{
- ext4_xattr_cache = mb_cache_create("ext4_xattr", 6);
- if (!ext4_xattr_cache)
- return -ENOMEM;
- return 0;
+ return mb_cache_create(name, HASH_BUCKET_BITS);
}
-void
-ext4_exit_xattr(void)
+void ext4_xattr_destroy_cache(struct mb_cache *cache)
{
- if (ext4_xattr_cache)
- mb_cache_destroy(ext4_xattr_cache);
- ext4_xattr_cache = NULL;
+ if (cache)
+ mb_cache_destroy(cache);
}
+
diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h
index 819d6398833f..29bedf5589f6 100644
--- a/fs/ext4/xattr.h
+++ b/fs/ext4/xattr.h
@@ -110,9 +110,6 @@ extern void ext4_xattr_put_super(struct super_block *);
extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
struct ext4_inode *raw_inode, handle_t *handle);
-extern int __init ext4_init_xattr(void);
-extern void ext4_exit_xattr(void);
-
extern const struct xattr_handler *ext4_xattr_handlers[];
extern int ext4_xattr_ibody_find(struct inode *inode, struct ext4_xattr_info *i,
@@ -124,6 +121,9 @@ extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
struct ext4_xattr_info *i,
struct ext4_xattr_ibody_find *is);
+extern struct mb_cache *ext4_xattr_create_cache(char *name);
+extern void ext4_xattr_destroy_cache(struct mb_cache *);
+
#ifdef CONFIG_EXT4_FS_SECURITY
extern int ext4_init_security(handle_t *handle, struct inode *inode,
struct inode *dir, const struct qstr *qstr);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 20:43:34 +0000