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Diffstat (limited to 'fs/ext4/ialloc.c')
-rw-r--r--fs/ext4/ialloc.c73
1 files changed, 34 insertions, 39 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index f18e0a0..3743bd8 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -27,7 +27,6 @@
#include "ext4_jbd2.h"
#include "xattr.h"
#include "acl.h"
-#include "group.h"
/*
* ialloc.c contains the inodes allocation and deallocation routines
@@ -123,16 +122,16 @@ ext4_read_inode_bitmap(struct super_block *sb, ext4_group_t block_group)
unlock_buffer(bh);
return bh;
}
- spin_lock(sb_bgl_lock(EXT4_SB(sb), block_group));
+ ext4_lock_group(sb, block_group);
if (desc->bg_flags & cpu_to_le16(EXT4_BG_INODE_UNINIT)) {
ext4_init_inode_bitmap(sb, bh, block_group, desc);
set_bitmap_uptodate(bh);
set_buffer_uptodate(bh);
- spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
+ ext4_unlock_group(sb, block_group);
unlock_buffer(bh);
return bh;
}
- spin_unlock(sb_bgl_lock(EXT4_SB(sb), block_group));
+ ext4_unlock_group(sb, block_group);
if (buffer_uptodate(bh)) {
/*
* if not uninit if bh is uptodate,
@@ -247,9 +246,8 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
goto error_return;
/* Ok, now we can actually update the inode bitmaps.. */
- spin_lock(sb_bgl_lock(sbi, block_group));
- cleared = ext4_clear_bit(bit, bitmap_bh->b_data);
- spin_unlock(sb_bgl_lock(sbi, block_group));
+ cleared = ext4_clear_bit_atomic(ext4_group_lock_ptr(sb, block_group),
+ bit, bitmap_bh->b_data);
if (!cleared)
ext4_error(sb, "ext4_free_inode",
"bit already cleared for inode %lu", ino);
@@ -261,7 +259,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
if (fatal) goto error_return;
if (gdp) {
- spin_lock(sb_bgl_lock(sbi, block_group));
+ ext4_lock_group(sb, block_group);
count = ext4_free_inodes_count(sb, gdp) + 1;
ext4_free_inodes_set(sb, gdp, count);
if (is_directory) {
@@ -277,7 +275,7 @@ void ext4_free_inode(handle_t *handle, struct inode *inode)
}
gdp->bg_checksum = ext4_group_desc_csum(sbi,
block_group, gdp);
- spin_unlock(sb_bgl_lock(sbi, block_group));
+ ext4_unlock_group(sb, block_group);
percpu_counter_inc(&sbi->s_freeinodes_counter);
if (is_directory)
percpu_counter_dec(&sbi->s_dirs_counter);
@@ -316,7 +314,7 @@ error_return:
static int find_group_dir(struct super_block *sb, struct inode *parent,
ext4_group_t *best_group)
{
- ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
+ ext4_group_t ngroups = ext4_get_groups_count(sb);
unsigned int freei, avefreei;
struct ext4_group_desc *desc, *best_desc = NULL;
ext4_group_t group;
@@ -349,11 +347,10 @@ static int find_group_flex(struct super_block *sb, struct inode *parent,
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_desc *desc;
- struct buffer_head *bh;
struct flex_groups *flex_group = sbi->s_flex_groups;
ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
ext4_group_t parent_fbg_group = ext4_flex_group(sbi, parent_group);
- ext4_group_t ngroups = sbi->s_groups_count;
+ ext4_group_t ngroups = ext4_get_groups_count(sb);
int flex_size = ext4_flex_bg_size(sbi);
ext4_group_t best_flex = parent_fbg_group;
int blocks_per_flex = sbi->s_blocks_per_group * flex_size;
@@ -362,7 +359,7 @@ static int find_group_flex(struct super_block *sb, struct inode *parent,
ext4_group_t n_fbg_groups;
ext4_group_t i;
- n_fbg_groups = (sbi->s_groups_count + flex_size - 1) >>
+ n_fbg_groups = (ngroups + flex_size - 1) >>
sbi->s_log_groups_per_flex;
find_close_to_parent:
@@ -404,7 +401,7 @@ find_close_to_parent:
found_flexbg:
for (i = best_flex * flex_size; i < ngroups &&
i < (best_flex + 1) * flex_size; i++) {
- desc = ext4_get_group_desc(sb, i, &bh);
+ desc = ext4_get_group_desc(sb, i, NULL);
if (ext4_free_inodes_count(sb, desc)) {
*best_group = i;
goto out;
@@ -478,20 +475,21 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
{
ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
struct ext4_sb_info *sbi = EXT4_SB(sb);
- ext4_group_t ngroups = sbi->s_groups_count;
+ ext4_group_t real_ngroups = ext4_get_groups_count(sb);
int inodes_per_group = EXT4_INODES_PER_GROUP(sb);
unsigned int freei, avefreei;
ext4_fsblk_t freeb, avefreeb;
unsigned int ndirs;
int max_dirs, min_inodes;
ext4_grpblk_t min_blocks;
- ext4_group_t i, grp, g;
+ ext4_group_t i, grp, g, ngroups;
struct ext4_group_desc *desc;
struct orlov_stats stats;
int flex_size = ext4_flex_bg_size(sbi);
+ ngroups = real_ngroups;
if (flex_size > 1) {
- ngroups = (ngroups + flex_size - 1) >>
+ ngroups = (real_ngroups + flex_size - 1) >>
sbi->s_log_groups_per_flex;
parent_group >>= sbi->s_log_groups_per_flex;
}
@@ -543,7 +541,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
*/
grp *= flex_size;
for (i = 0; i < flex_size; i++) {
- if (grp+i >= sbi->s_groups_count)
+ if (grp+i >= real_ngroups)
break;
desc = ext4_get_group_desc(sb, grp+i, NULL);
if (desc && ext4_free_inodes_count(sb, desc)) {
@@ -583,7 +581,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
}
fallback:
- ngroups = sbi->s_groups_count;
+ ngroups = real_ngroups;
avefreei = freei / ngroups;
fallback_retry:
parent_group = EXT4_I(parent)->i_block_group;
@@ -613,9 +611,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
ext4_group_t *group, int mode)
{
ext4_group_t parent_group = EXT4_I(parent)->i_block_group;
- ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
+ ext4_group_t i, last, ngroups = ext4_get_groups_count(sb);
struct ext4_group_desc *desc;
- ext4_group_t i, last;
int flex_size = ext4_flex_bg_size(EXT4_SB(sb));
/*
@@ -708,10 +705,10 @@ static int find_group_other(struct super_block *sb, struct inode *parent,
/*
* claim the inode from the inode bitmap. If the group
- * is uninit we need to take the groups's sb_bgl_lock
+ * is uninit we need to take the groups's ext4_group_lock
* and clear the uninit flag. The inode bitmap update
* and group desc uninit flag clear should be done
- * after holding sb_bgl_lock so that ext4_read_inode_bitmap
+ * after holding ext4_group_lock so that ext4_read_inode_bitmap
* doesn't race with the ext4_claim_inode
*/
static int ext4_claim_inode(struct super_block *sb,
@@ -722,7 +719,7 @@ static int ext4_claim_inode(struct super_block *sb,
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group, NULL);
- spin_lock(sb_bgl_lock(sbi, group));
+ ext4_lock_group(sb, group);
if (ext4_set_bit(ino, inode_bitmap_bh->b_data)) {
/* not a free inode */
retval = 1;
@@ -731,7 +728,7 @@ static int ext4_claim_inode(struct super_block *sb,
ino++;
if ((group == 0 && ino < EXT4_FIRST_INO(sb)) ||
ino > EXT4_INODES_PER_GROUP(sb)) {
- spin_unlock(sb_bgl_lock(sbi, group));
+ ext4_unlock_group(sb, group);
ext4_error(sb, __func__,
"reserved inode or inode > inodes count - "
"block_group = %u, inode=%lu", group,
@@ -780,7 +777,7 @@ static int ext4_claim_inode(struct super_block *sb,
}
gdp->bg_checksum = ext4_group_desc_csum(sbi, group, gdp);
err_ret:
- spin_unlock(sb_bgl_lock(sbi, group));
+ ext4_unlock_group(sb, group);
return retval;
}
@@ -799,11 +796,10 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
struct super_block *sb;
struct buffer_head *inode_bitmap_bh = NULL;
struct buffer_head *group_desc_bh;
- ext4_group_t group = 0;
+ ext4_group_t ngroups, group = 0;
unsigned long ino = 0;
struct inode *inode;
struct ext4_group_desc *gdp = NULL;
- struct ext4_super_block *es;
struct ext4_inode_info *ei;
struct ext4_sb_info *sbi;
int ret2, err = 0;
@@ -818,15 +814,14 @@ struct inode *ext4_new_inode(handle_t *handle, struct inode *dir, int mode)
return ERR_PTR(-EPERM);
sb = dir->i_sb;
+ ngroups = ext4_get_groups_count(sb);
trace_mark(ext4_request_inode, "dev %s dir %lu mode %d", sb->s_id,
dir->i_ino, mode);
inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
ei = EXT4_I(inode);
-
sbi = EXT4_SB(sb);
- es = sbi->s_es;
if (sbi->s_log_groups_per_flex && test_opt(sb, OLDALLOC)) {
ret2 = find_group_flex(sb, dir, &group);
@@ -856,7 +851,7 @@ got_group:
if (ret2 == -1)
goto out;
- for (i = 0; i < sbi->s_groups_count; i++) {
+ for (i = 0; i < ngroups; i++) {
err = -EIO;
gdp = ext4_get_group_desc(sb, group, &group_desc_bh);
@@ -917,7 +912,7 @@ repeat_in_this_group:
* group descriptor metadata has not yet been updated.
* So we just go onto the next blockgroup.
*/
- if (++group == sbi->s_groups_count)
+ if (++group == ngroups)
group = 0;
}
err = -ENOSPC;
@@ -938,7 +933,7 @@ got:
}
free = 0;
- spin_lock(sb_bgl_lock(sbi, group));
+ ext4_lock_group(sb, group);
/* recheck and clear flag under lock if we still need to */
if (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
free = ext4_free_blocks_after_init(sb, group, gdp);
@@ -947,7 +942,7 @@ got:
gdp->bg_checksum = ext4_group_desc_csum(sbi, group,
gdp);
}
- spin_unlock(sb_bgl_lock(sbi, group));
+ ext4_unlock_group(sb, group);
/* Don't need to dirty bitmap block if we didn't change it */
if (free) {
@@ -1158,7 +1153,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
{
unsigned long desc_count;
struct ext4_group_desc *gdp;
- ext4_group_t i;
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
#ifdef EXT4FS_DEBUG
struct ext4_super_block *es;
unsigned long bitmap_count, x;
@@ -1168,7 +1163,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
desc_count = 0;
bitmap_count = 0;
gdp = NULL;
- for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+ for (i = 0; i < ngroups; i++) {
gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
@@ -1190,7 +1185,7 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
return desc_count;
#else
desc_count = 0;
- for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+ for (i = 0; i < ngroups; i++) {
gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
@@ -1205,9 +1200,9 @@ unsigned long ext4_count_free_inodes(struct super_block *sb)
unsigned long ext4_count_dirs(struct super_block * sb)
{
unsigned long count = 0;
- ext4_group_t i;
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
- for (i = 0; i < EXT4_SB(sb)->s_groups_count; i++) {
+ for (i = 0; i < ngroups; i++) {
struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL);
if (!gdp)
continue;
generated by cgit v0.10.2 at 2024-11-11 22:19:33 (GMT)