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-rw-r--r--fs/ext4/balloc.c17
-rw-r--r--fs/ext4/ext4.h13
-rw-r--r--fs/ext4/extents.c35
-rw-r--r--fs/ext4/inode.c6
-rw-r--r--fs/ext4/mballoc.c16
-rw-r--r--fs/ext4/xattr.c4
6 files changed, 60 insertions, 31 deletions
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index b2d10da505ef..264f6949511e 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -369,7 +369,8 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
* Check if filesystem has nblocks free & available for allocation.
* On success return 1, return 0 on failure.
*/
-static int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
+static int ext4_has_free_blocks(struct ext4_sb_info *sbi,
+ s64 nblocks, unsigned int flags)
{
s64 free_blocks, dirty_blocks, root_blocks;
struct percpu_counter *fbc = &sbi->s_freeblocks_counter;
@@ -393,7 +394,9 @@ static int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
/* Hm, nope. Are (enough) root reserved blocks available? */
if (sbi->s_resuid == current_fsuid() ||
((sbi->s_resgid != 0) && in_group_p(sbi->s_resgid)) ||
- capable(CAP_SYS_RESOURCE)) {
+ capable(CAP_SYS_RESOURCE) ||
+ (flags & EXT4_MB_USE_ROOT_BLOCKS)) {
+
if (free_blocks >= (nblocks + dirty_blocks))
return 1;
}
@@ -402,9 +405,9 @@ static int ext4_has_free_blocks(struct ext4_sb_info *sbi, s64 nblocks)
}
int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
- s64 nblocks)
+ s64 nblocks, unsigned int flags)
{
- if (ext4_has_free_blocks(sbi, nblocks)) {
+ if (ext4_has_free_blocks(sbi, nblocks, flags)) {
percpu_counter_add(&sbi->s_dirtyblocks_counter, nblocks);
return 0;
} else
@@ -425,7 +428,7 @@ int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
*/
int ext4_should_retry_alloc(struct super_block *sb, int *retries)
{
- if (!ext4_has_free_blocks(EXT4_SB(sb), 1) ||
+ if (!ext4_has_free_blocks(EXT4_SB(sb), 1, 0) ||
(*retries)++ > 3 ||
!EXT4_SB(sb)->s_journal)
return 0;
@@ -448,7 +451,8 @@ int ext4_should_retry_alloc(struct super_block *sb, int *retries)
* error stores in errp pointer
*/
ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, unsigned long *count, int *errp)
+ ext4_fsblk_t goal, unsigned int flags,
+ unsigned long *count, int *errp)
{
struct ext4_allocation_request ar;
ext4_fsblk_t ret;
@@ -458,6 +462,7 @@ ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
ar.inode = inode;
ar.goal = goal;
ar.len = count ? *count : 1;
+ ar.flags = flags;
ret = ext4_mb_new_blocks(handle, &ar, errp);
if (count)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 2bc4c21f1d26..2f310d1839ed 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -108,7 +108,8 @@ typedef unsigned int ext4_group_t;
#define EXT4_MB_DELALLOC_RESERVED 0x0400
/* We are doing stream allocation */
#define EXT4_MB_STREAM_ALLOC 0x0800
-
+/* Use reserved root blocks if needed */
+#define EXT4_MB_USE_ROOT_BLOCKS 0x1000
struct ext4_allocation_request {
/* target inode for block we're allocating */
@@ -514,6 +515,8 @@ struct ext4_new_group_data {
/* Convert extent to initialized after IO complete */
#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
+ /* Punch out blocks of an extent */
+#define EXT4_GET_BLOCKS_PUNCH_OUT_EXT 0x0020
/*
* Flags used by ext4_free_blocks
@@ -1718,8 +1721,12 @@ extern int ext4_bg_has_super(struct super_block *sb, ext4_group_t group);
extern unsigned long ext4_bg_num_gdb(struct super_block *sb,
ext4_group_t group);
extern ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, unsigned long *count, int *errp);
-extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi, s64 nblocks);
+ ext4_fsblk_t goal,
+ unsigned int flags,
+ unsigned long *count,
+ int *errp);
+extern int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
+ s64 nblocks, unsigned int flags);
extern ext4_fsblk_t ext4_count_free_blocks(struct super_block *);
extern void ext4_check_blocks_bitmap(struct super_block *);
extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ca62d748cc65..aa3a2601bada 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -192,12 +192,13 @@ static ext4_fsblk_t ext4_ext_find_goal(struct inode *inode,
static ext4_fsblk_t
ext4_ext_new_meta_block(handle_t *handle, struct inode *inode,
struct ext4_ext_path *path,
- struct ext4_extent *ex, int *err)
+ struct ext4_extent *ex, int *err, unsigned int flags)
{
ext4_fsblk_t goal, newblock;
goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block));
- newblock = ext4_new_meta_blocks(handle, inode, goal, NULL, err);
+ newblock = ext4_new_meta_blocks(handle, inode, goal, flags,
+ NULL, err);
return newblock;
}
@@ -792,8 +793,9 @@ static int ext4_ext_insert_index(handle_t *handle, struct inode *inode,
* - initializes subtree
*/
static int ext4_ext_split(handle_t *handle, struct inode *inode,
- struct ext4_ext_path *path,
- struct ext4_extent *newext, int at)
+ unsigned int flags,
+ struct ext4_ext_path *path,
+ struct ext4_extent *newext, int at)
{
struct buffer_head *bh = NULL;
int depth = ext_depth(inode);
@@ -847,7 +849,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
ext_debug("allocate %d blocks for indexes/leaf\n", depth - at);
for (a = 0; a < depth - at; a++) {
newblock = ext4_ext_new_meta_block(handle, inode, path,
- newext, &err);
+ newext, &err, flags);
if (newblock == 0)
goto cleanup;
ablocks[a] = newblock;
@@ -1056,8 +1058,9 @@ cleanup:
* just created block
*/
static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
- struct ext4_ext_path *path,
- struct ext4_extent *newext)
+ unsigned int flags,
+ struct ext4_ext_path *path,
+ struct ext4_extent *newext)
{
struct ext4_ext_path *curp = path;
struct ext4_extent_header *neh;
@@ -1065,7 +1068,8 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
ext4_fsblk_t newblock;
int err = 0;
- newblock = ext4_ext_new_meta_block(handle, inode, path, newext, &err);
+ newblock = ext4_ext_new_meta_block(handle, inode, path,
+ newext, &err, flags);
if (newblock == 0)
return err;
@@ -1140,8 +1144,9 @@ out:
* if no free index is found, then it requests in-depth growing.
*/
static int ext4_ext_create_new_leaf(handle_t *handle, struct inode *inode,
- struct ext4_ext_path *path,
- struct ext4_extent *newext)
+ unsigned int flags,
+ struct ext4_ext_path *path,
+ struct ext4_extent *newext)
{
struct ext4_ext_path *curp;
int depth, i, err = 0;
@@ -1161,7 +1166,7 @@ repeat:
if (EXT_HAS_FREE_INDEX(curp)) {
/* if we found index with free entry, then use that
* entry: create all needed subtree and add new leaf */
- err = ext4_ext_split(handle, inode, path, newext, i);
+ err = ext4_ext_split(handle, inode, flags, path, newext, i);
if (err)
goto out;
@@ -1174,7 +1179,8 @@ repeat:
err = PTR_ERR(path);
} else {
/* tree is full, time to grow in depth */
- err = ext4_ext_grow_indepth(handle, inode, path, newext);
+ err = ext4_ext_grow_indepth(handle, inode, flags,
+ path, newext);
if (err)
goto out;
@@ -1693,6 +1699,7 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
int depth, len, err;
ext4_lblk_t next;
unsigned uninitialized = 0;
+ int flags = 0;
if (unlikely(ext4_ext_get_actual_len(newext) == 0)) {
EXT4_ERROR_INODE(inode, "ext4_ext_get_actual_len(newext) == 0");
@@ -1767,7 +1774,9 @@ repeat:
* There is no free space in the found leaf.
* We're gonna add a new leaf in the tree.
*/
- err = ext4_ext_create_new_leaf(handle, inode, path, newext);
+ if (flag & EXT4_GET_BLOCKS_PUNCH_OUT_EXT)
+ flags = EXT4_MB_USE_ROOT_BLOCKS;
+ err = ext4_ext_create_new_leaf(handle, inode, flags, path, newext);
if (err)
goto cleanup;
depth = ext_depth(inode);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d98b033dd4a4..aef864b725d3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -639,8 +639,8 @@ static int ext4_alloc_blocks(handle_t *handle, struct inode *inode,
while (target > 0) {
count = target;
/* allocating blocks for indirect blocks and direct blocks */
- current_block = ext4_new_meta_blocks(handle, inode,
- goal, &count, err);
+ current_block = ext4_new_meta_blocks(handle, inode, goal,
+ 0, &count, err);
if (*err)
goto failed_out;
@@ -1930,7 +1930,7 @@ repeat:
* We do still charge estimated metadata to the sb though;
* we cannot afford to run out of free blocks.
*/
- if (ext4_claim_free_blocks(sbi, md_needed + 1)) {
+ if (ext4_claim_free_blocks(sbi, md_needed + 1, 0)) {
dquot_release_reservation_block(inode, 1);
if (ext4_should_retry_alloc(inode->i_sb, &retries)) {
yield();
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 396b01f5c4fb..859f2ae8864e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4236,7 +4236,9 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
* there is enough free blocks to do block allocation
* and verify allocation doesn't exceed the quota limits.
*/
- while (ar->len && ext4_claim_free_blocks(sbi, ar->len)) {
+ while (ar->len &&
+ ext4_claim_free_blocks(sbi, ar->len, ar->flags)) {
+
/* let others to free the space */
yield();
ar->len = ar->len >> 1;
@@ -4246,9 +4248,15 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle,
return 0;
}
reserv_blks = ar->len;
- while (ar->len && dquot_alloc_block(ar->inode, ar->len)) {
- ar->flags |= EXT4_MB_HINT_NOPREALLOC;
- ar->len--;
+ if (ar->flags & EXT4_MB_USE_ROOT_BLOCKS) {
+ dquot_alloc_block_nofail(ar->inode, ar->len);
+ } else {
+ while (ar->len &&
+ dquot_alloc_block(ar->inode, ar->len)) {
+
+ ar->flags |= EXT4_MB_HINT_NOPREALLOC;
+ ar->len--;
+ }
}
inquota = ar->len;
if (ar->len == 0) {
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index b545ca1c459c..c757adc97250 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -820,8 +820,8 @@ inserted:
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)))
goal = goal & EXT4_MAX_BLOCK_FILE_PHYS;
- block = ext4_new_meta_blocks(handle, inode,
- goal, NULL, &error);
+ block = ext4_new_meta_blocks(handle, inode, goal, 0,
+ NULL, &error);
if (error)
goto cleanup;
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 13:43:48 +0000