[PATCH 3/5] ext4: use fs netlink interface for ENOSPC conditions
From: Lukas Czerner
Date: Thu Aug 18 2011 - 08:19:32 EST
Register fs netlink interface and send proper warning if ENOSPC is
encountered. Note that we differentiate between enospc for metadata and
enospc for data.
Also fix ext4_should_retry_alloc() so we do not check for free blocks
when we are actually allocating metadata.
Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
CC: Theodore Ts'o <tytso@xxxxxxx>
CC: Ext4 Developers List <linux-ext4@xxxxxxxxxxxxxxx>
---
fs/ext4/acl.c | 5 +++--
fs/ext4/balloc.c | 15 +++++++++++----
fs/ext4/ext4.h | 3 ++-
fs/ext4/extents.c | 2 +-
fs/ext4/indirect.c | 2 +-
fs/ext4/inode.c | 10 +++++-----
fs/ext4/namei.c | 10 +++++-----
fs/ext4/super.c | 1 +
fs/ext4/xattr.c | 2 +-
9 files changed, 30 insertions(+), 20 deletions(-)
diff --git a/fs/ext4/acl.c b/fs/ext4/acl.c
index a5c29bb..cc3e72c 100644
--- a/fs/ext4/acl.c
+++ b/fs/ext4/acl.c
@@ -321,7 +321,7 @@ retry:
error = ext4_set_acl(handle, inode, ACL_TYPE_ACCESS, acl);
ext4_journal_stop(handle);
if (error == -ENOSPC &&
- ext4_should_retry_alloc(inode->i_sb, &retries))
+ ext4_should_retry_alloc(inode->i_sb, &retries, 0))
goto retry;
out:
posix_acl_release(acl);
@@ -414,7 +414,8 @@ retry:
return PTR_ERR(handle);
error = ext4_set_acl(handle, inode, type, acl);
ext4_journal_stop(handle);
- if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb,
+ &retries, 0))
goto retry;
release_and_out:
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index f8224ad..42daae7 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -426,12 +426,19 @@ int ext4_claim_free_blocks(struct ext4_sb_info *sbi,
*
* if the total number of retries exceed three times, return FALSE.
*/
-int ext4_should_retry_alloc(struct super_block *sb, int *retries)
+int ext4_should_retry_alloc(struct super_block *sb, int *retries, int data)
{
- if (!ext4_has_free_blocks(EXT4_SB(sb), 1, 0) ||
- (*retries)++ > 3 ||
- !EXT4_SB(sb)->s_journal)
+ if ((data && !ext4_has_free_blocks(EXT4_SB(sb), 1, 0)) ||
+ ++(*retries) >= 3 ||
+ !EXT4_SB(sb)->s_journal) {
+ if (data)
+ fs_nl_send_warning(sb->s_dev, FS_NL_ENOSPC_WARN);
+ else
+ fs_nl_send_warning(sb->s_dev, FS_NL_META_ENOSPC_WARN);
return 0;
+ }
+
+
jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e717dfd..45cb981 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1741,7 +1741,8 @@ extern void ext4_check_blocks_bitmap(struct super_block *);
extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
ext4_group_t block_group,
struct buffer_head ** bh);
-extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
+extern int ext4_should_retry_alloc(struct super_block *sb, int *retries,
+ int data);
struct buffer_head *ext4_read_block_bitmap(struct super_block *sb,
ext4_group_t block_group);
extern unsigned ext4_init_block_bitmap(struct super_block *sb,
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 57cf568..1c8cb04 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3834,7 +3834,7 @@ retry:
break;
}
if (ret == -ENOSPC &&
- ext4_should_retry_alloc(inode->i_sb, &retries)) {
+ ext4_should_retry_alloc(inode->i_sb, &retries, 1)) {
ret = 0;
goto retry;
}
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index b8602cd..40153bc 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -817,7 +817,7 @@ retry:
ext4_truncate_failed_write(inode);
}
}
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries, 1))
goto retry;
if (orphan) {
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index d47264c..d0596f3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -814,7 +814,7 @@ retry:
}
}
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries, 1))
goto retry;
out:
return ret;
@@ -1067,7 +1067,7 @@ repeat:
*/
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)) {
+ if (ext4_should_retry_alloc(inode->i_sb, &retries, 1)) {
yield();
goto repeat;
}
@@ -2291,7 +2291,7 @@ retry:
ext4_truncate_failed_write(inode);
}
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries, 1))
goto retry;
out:
return ret;
@@ -4349,7 +4349,7 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
ret = __block_page_mkwrite(vma, vmf,
ext4_da_get_block_prep);
} while (ret == -ENOSPC &&
- ext4_should_retry_alloc(inode->i_sb, &retries));
+ ext4_should_retry_alloc(inode->i_sb, &retries, 1));
goto out_ret;
}
@@ -4402,7 +4402,7 @@ retry_alloc:
ext4_set_inode_state(inode, EXT4_STATE_JDATA);
}
ext4_journal_stop(handle);
- if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
+ if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries, 1))
goto retry_alloc;
out_ret:
ret = block_page_mkwrite_return(ret);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index f8068c7..5a2fe5e 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1764,7 +1764,7 @@ retry:
err = ext4_add_nondir(handle, dentry, inode);
}
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries, 0))
goto retry;
return err;
}
@@ -1801,7 +1801,7 @@ retry:
err = ext4_add_nondir(handle, dentry, inode);
}
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries, 0))
goto retry;
return err;
}
@@ -1886,7 +1886,7 @@ out_clear_inode:
out_stop:
brelse(dir_block);
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries, 0))
goto retry;
return err;
}
@@ -2333,7 +2333,7 @@ retry:
err = ext4_add_nondir(handle, dentry, inode);
out_stop:
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries, 0))
goto retry;
return err;
err_drop_inode:
@@ -2376,7 +2376,7 @@ retry:
iput(inode);
}
ext4_journal_stop(handle);
- if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
+ if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries, 0))
goto retry;
return err;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 4687fea..83b7ccd 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5011,6 +5011,7 @@ static int __init ext4_init_fs(void)
ext4_li_info = NULL;
mutex_init(&ext4_li_mtx);
+ init_fs_nl_family();
return 0;
out:
unregister_as_ext2();
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index c757adc..a3e381b 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1094,7 +1094,7 @@ 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(inode->i_sb, &retries, 0))
goto retry;
if (error == 0)
error = error2;
--
1.7.4.4
--
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