if (sbi->s_dev_proc) {
remove_proc_entry(sbi->s_dev_proc->name, proc_root_ext3);
sbi->s_dev_proc = NULL;
-@@ -1375,7 +1379,7 @@ static int ext3_check_descriptors (struc
+@@ -1395,7 +1399,7 @@ static int ext3_check_descriptors (struc
return 0;
}
if (!ext3_group_desc_csum_verify(sbi, i, gdp)) {
"Checksum for group %d failed (%u!=%u)\n", i,
le16_to_cpu(ext3_group_desc_csum(sbi,i,gdp)),
le16_to_cpu(gdp->bg_checksum));
-@@ -1470,7 +1474,7 @@ static void ext3_orphan_cleanup (struct
+@@ -1490,7 +1494,7 @@ static void ext3_orphan_cleanup (struct
if (inode->i_nlink) {
printk(KERN_DEBUG
"%s: truncating inode %lu to %Ld bytes\n",
jbd_debug(2, "truncating inode %lu to %Ld bytes\n",
inode->i_ino, inode->i_size);
ext3_truncate(inode);
-@@ -1478,7 +1482,7 @@ static void ext3_orphan_cleanup (struct
+@@ -1498,7 +1502,7 @@ static void ext3_orphan_cleanup (struct
} else {
printk(KERN_DEBUG
"%s: deleting unreferenced inode %lu\n",
jbd_debug(2, "deleting unreferenced inode %lu\n",
inode->i_ino);
nr_orphans++;
-@@ -1548,6 +1552,346 @@ static ext3_fsblk_t descriptor_loc(struc
+@@ -1568,6 +1572,355 @@ static ext3_fsblk_t descriptor_loc(struc
return (has_super + ext3_group_first_block_no(sb, bg));
}
+ */
+static int kmmpd(void *data)
+{
-+ struct super_block *sb = (struct super_block *) data;
++ struct super_block *sb = ((struct mmpd_data *) data)->sb;
++ struct buffer_head *bh = ((struct mmpd_data *) data)->bh;
+ struct ext3_super_block *es = EXT3_SB(sb)->s_es;
-+ struct buffer_head *bh = NULL;
+ struct mmp_struct *mmp;
+ unsigned long mmp_block;
+ u32 seq = 0;
+ int retval;
+
+ mmp_block = le64_to_cpu(es->s_mmp_block);
-+ retval = read_mmp_block(sb, &bh, mmp_block);
-+ if (retval)
-+ goto failed;
-+
+ mmp = (struct mmp_struct *)(bh->b_data);
+ mmp->mmp_time = cpu_to_le64(get_seconds());
+ /*
+ * Start with the higher mmp_check_interval and reduce it if
+ * the MMP block is being updated on time.
+ */
-+ mmp_check_interval = max(5 * mmp_update_interval,
++ mmp_check_interval = max(5UL * mmp_update_interval,
+ EXT3_MMP_MIN_CHECK_INTERVAL);
+ mmp->mmp_check_interval = cpu_to_le16(mmp_check_interval);
+ bdevname(bh->b_bdev, mmp->mmp_bdevname);
+ EXT3_FEATURE_INCOMPAT_MMP)) {
+ ext3_warning(sb, __func__, "kmmpd being stopped "
+ "since MMP feature has been disabled.");
-+ EXT3_SB(sb)->s_mmp_tsk = 0;
++ EXT3_SB(sb)->s_mmp_tsk = NULL;
+ goto failed;
+ }
+
+ ext3_warning(sb, __func__, "kmmpd being stopped "
+ "since filesystem has been remounted as "
+ "readonly.");
-+ EXT3_SB(sb)->s_mmp_tsk = 0;
++ EXT3_SB(sb)->s_mmp_tsk = NULL;
+ goto failed;
+ }
+
+
+ retval = read_mmp_block(sb, &bh_check, mmp_block);
+ if (retval) {
-+ EXT3_SB(sb)->s_mmp_tsk = 0;
++ ext3_error(sb, __func__, "error reading MMP"
++ "data: %d", retval);
++ EXT3_SB(sb)->s_mmp_tsk = NULL;
+ goto failed;
+ }
+
+ mmp_check = (struct mmp_struct *)(bh_check->b_data);
-+ if (mmp->mmp_time != mmp_check->mmp_time ||
++ if (mmp->mmp_seq != mmp_check->mmp_seq ||
+ memcmp(mmp->mmp_nodename, mmp_check->mmp_nodename,
-+ sizeof(mmp->mmp_nodename)))
++ sizeof(mmp->mmp_nodename))) {
+ dump_mmp_msg(sb, mmp_check, __func__,
+ "Error while updating MMP info. "
+ "The filesystem seems to have "
+ "been multiply mounted.");
-+
++ ext3_error(sb, __func__, "abort");
++ goto failed;
++ }
+ put_bh(bh_check);
+ }
+
+ * Adjust the mmp_check_interval depending on how much time
+ * it took for the MMP block to be written.
+ */
-+ mmp_check_interval = max(5 * diff / HZ,
-+ (unsigned long) EXT3_MMP_MIN_CHECK_INTERVAL);
++ mmp_check_interval = max(min(5 * diff / HZ,
++ EXT3_MMP_MAX_CHECK_INTERVAL),
++ EXT3_MMP_MIN_CHECK_INTERVAL);
+ mmp->mmp_check_interval = cpu_to_le16(mmp_check_interval);
+ }
+
+ struct ext3_super_block *es = EXT3_SB(sb)->s_es;
+ struct buffer_head *bh = NULL;
+ struct mmp_struct *mmp = NULL;
++ struct mmpd_data *mmpd_data;
+ u32 seq;
+ unsigned int mmp_check_interval = le16_to_cpu(es->s_mmp_update_interval);
+ unsigned int wait_time = 0;
+ goto failed;
+ }
+
++ mmpd_data = kmalloc(sizeof(struct mmpd_data *), GFP_KERNEL);
++ if (!mmpd_data) {
++ ext3_warning(sb, KERN_ERR, "not enough memory for mmpd_data");
++ goto failed;
++ }
++ mmpd_data->sb = sb;
++ mmpd_data->bh = bh;
++
+ /*
+ * Start a kernel thread to update the MMP block periodically.
+ */
-+ EXT3_SB(sb)->s_mmp_tsk = kthread_run(kmmpd, sb, "kmmpd-%02x:%02x",
-+ MAJOR(sb->s_dev),
-+ MINOR(sb->s_dev));
++ EXT3_SB(sb)->s_mmp_tsk = kthread_run(kmmpd, mmpd_data, "kmmpd-%s",
++ bdevname(bh->b_bdev,
++ mmp->mmp_bdevname));
+ if (IS_ERR(EXT3_SB(sb)->s_mmp_tsk)) {
-+ EXT3_SB(sb)->s_mmp_tsk = 0;
++ EXT3_SB(sb)->s_mmp_tsk = NULL;
+ ext3_warning(sb, __func__, "Unable to create kmmpd thread "
+ "for %s.", sb->s_id);
+ goto failed;
+ }
+
-+ brelse(bh);
+ return 0;
+
+failed:
static int ext3_fill_super (struct super_block *sb, void *data, int silent)
{
-@@ -1880,6 +2224,11 @@ static int ext3_fill_super (struct super
+@@ -1901,6 +2254,11 @@ static int ext3_fill_super (struct super
EXT3_HAS_INCOMPAT_FEATURE(sb,
EXT3_FEATURE_INCOMPAT_RECOVER));
/*
* The first inode we look at is the journal inode. Don't try
* root first: it may be modified in the journal!
-@@ -2012,6 +2361,8 @@ cantfind_ext3:
+@@ -2033,6 +2391,8 @@ cantfind_ext3:
failed_mount4:
journal_destroy(sbi->s_journal);
failed_mount3:
percpu_counter_destroy(&sbi->s_freeblocks_counter);
percpu_counter_destroy(&sbi->s_freeinodes_counter);
percpu_counter_destroy(&sbi->s_dirs_counter);
-@@ -2388,9 +2739,9 @@ static void ext3_clear_journal_err(struc
+@@ -2409,9 +2769,9 @@ static void ext3_clear_journal_err(struc
char nbuf[16];
errstr = ext3_decode_error(sb, j_errno, nbuf);
"filesystem check.");
EXT3_SB(sb)->s_mount_state |= EXT3_ERROR_FS;
-@@ -2510,7 +2861,7 @@ static int ext3_remount (struct super_bl
+@@ -2531,7 +2891,7 @@ static int ext3_remount (struct super_bl
ext3_fsblk_t n_blocks_count = 0;
unsigned long old_sb_flags;
struct ext3_mount_options old_opts;
#ifdef CONFIG_QUOTA
int i;
#endif
-@@ -2536,7 +2887,7 @@ static int ext3_remount (struct super_bl
+@@ -2557,7 +2917,7 @@ static int ext3_remount (struct super_bl
}
if (sbi->s_mount_opt & EXT3_MOUNT_ABORT)
sb->s_flags = (sb->s_flags & ~MS_POSIXACL) |
((sbi->s_mount_opt & EXT3_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
-@@ -2609,6 +2960,13 @@ static int ext3_remount (struct super_bl
+@@ -2630,6 +2990,13 @@ static int ext3_remount (struct super_bl
}
if (!ext3_setup_super (sb, es, 0))
sb->s_flags &= ~MS_RDONLY;
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
EXT4_FEATURE_RO_COMPAT_GDT_CSUM| \
-@@ -871,6 +877,39 @@ ext3_group_first_block_no(struct super_b
+@@ -871,6 +877,50 @@ ext3_group_first_block_no(struct super_b
#define ERR_BAD_DX_DIR -75000
/*
+ __le32 mmp_pad2[227];
+};
+
++/* arguments passed to the mmp thread */
++struct mmpd_data {
++ struct buffer_head *bh; /* bh from initial read_mmp_block() */
++ struct super_block *sb; /* super block of the fs */
++};
++
+/*
+ * Default interval in seconds to update the MMP sequence number.
+ */
+/*
+ * Minimum interval for MMP checking in seconds.
+ */
-+#define EXT3_MMP_MIN_CHECK_INTERVAL 5
++#define EXT3_MMP_MIN_CHECK_INTERVAL 5UL
++
++/*
++ * Maximum interval for MMP checking in seconds.
++ */
++#define EXT3_MMP_MAX_CHECK_INTERVAL 300UL
+
+/*
* Function prototypes
===================================================================
--- linux-stage.orig/include/linux/ext3_fs_sb.h
+++ linux-stage/include/linux/ext3_fs_sb.h
-@@ -156,6 +156,7 @@ struct ext3_sb_info {
+@@ -157,6 +157,8 @@ struct ext3_sb_info {
/* locality groups */
struct ext3_locality_group *s_locality_groups;
-+ struct task_struct *s_mmp_tsk; /* Kernel thread for multiple mount protection */
++ /* Kernel thread for multiple mount protection */
++ struct task_struct *s_mmp_tsk;
};
#define EXT3_GROUP_INFO(sb, group) \
git://git.whamcloud.com / fs / lustre-release.git / blobdiff