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path: root/fs/btrfs/super.c
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Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c150
1 files changed, 64 insertions, 86 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 180f910339f4..b5ae7d3d1896 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -202,12 +202,12 @@ static struct ratelimit_state printk_limits[] = {
void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
{
struct super_block *sb = fs_info->sb;
- char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1];
+ char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1] = "\0";
struct va_format vaf;
va_list args;
- const char *type = NULL;
int kern_level;
- struct ratelimit_state *ratelimit;
+ const char *type = logtypes[4];
+ struct ratelimit_state *ratelimit = &printk_limits[4];
va_start(args, fmt);
@@ -223,12 +223,6 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
fmt += size;
}
- if (!type) {
- *lvl = '\0';
- type = logtypes[4];
- ratelimit = &printk_limits[4];
- }
-
vaf.fmt = fmt;
vaf.va = &args;
@@ -309,7 +303,7 @@ void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
static void btrfs_put_super(struct super_block *sb)
{
- close_ctree(btrfs_sb(sb)->tree_root);
+ close_ctree(btrfs_sb(sb));
}
enum {
@@ -400,10 +394,9 @@ static const match_table_t tokens = {
* reading in a new superblock is parsed here.
* XXX JDM: This needs to be cleaned up for remount.
*/
-int btrfs_parse_options(struct btrfs_root *root, char *options,
+int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
unsigned long new_flags)
{
- struct btrfs_fs_info *info = root->fs_info;
substring_t args[MAX_OPT_ARGS];
char *p, *num, *orig = NULL;
u64 cache_gen;
@@ -415,8 +408,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
bool saved_compress_force;
int no_compress = 0;
- cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy);
- if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE))
+ cache_gen = btrfs_super_cache_generation(info->super_copy);
+ if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE))
btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE);
else if (cache_gen)
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
@@ -446,7 +439,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
token = match_token(p, tokens, args);
switch (token) {
case Opt_degraded:
- btrfs_info(root->fs_info, "allowing degraded mounts");
+ btrfs_info(info, "allowing degraded mounts");
btrfs_set_opt(info->mount_opt, DEGRADED);
break;
case Opt_subvol:
@@ -465,11 +458,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
case Opt_datasum:
if (btrfs_test_opt(info, NODATASUM)) {
if (btrfs_test_opt(info, NODATACOW))
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"setting datasum, datacow enabled");
else
- btrfs_info(root->fs_info,
- "setting datasum");
+ btrfs_info(info, "setting datasum");
}
btrfs_clear_opt(info->mount_opt, NODATACOW);
btrfs_clear_opt(info->mount_opt, NODATASUM);
@@ -478,11 +470,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
if (!btrfs_test_opt(info, NODATACOW)) {
if (!btrfs_test_opt(info, COMPRESS) ||
!btrfs_test_opt(info, FORCE_COMPRESS)) {
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"setting nodatacow, compression disabled");
} else {
- btrfs_info(root->fs_info,
- "setting nodatacow");
+ btrfs_info(info, "setting nodatacow");
}
}
btrfs_clear_opt(info->mount_opt, COMPRESS);
@@ -549,8 +540,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
compress_force != saved_compress_force)) ||
(!btrfs_test_opt(info, COMPRESS) &&
no_compress == 1)) {
- btrfs_info(root->fs_info,
- "%s %s compression",
+ btrfs_info(info, "%s %s compression",
(compress_force) ? "force" : "use",
compress_type);
}
@@ -598,10 +588,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
if (info->max_inline) {
info->max_inline = min_t(u64,
info->max_inline,
- root->sectorsize);
+ info->sectorsize);
}
- btrfs_info(root->fs_info, "max_inline at %llu",
- info->max_inline);
+ btrfs_info(info, "max_inline at %llu",
+ info->max_inline);
} else {
ret = -ENOMEM;
goto out;
@@ -614,8 +604,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
info->alloc_start = memparse(num, NULL);
mutex_unlock(&info->chunk_mutex);
kfree(num);
- btrfs_info(root->fs_info,
- "allocations start at %llu",
+ btrfs_info(info, "allocations start at %llu",
info->alloc_start);
} else {
ret = -ENOMEM;
@@ -624,16 +613,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
break;
case Opt_acl:
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
- root->fs_info->sb->s_flags |= MS_POSIXACL;
+ info->sb->s_flags |= MS_POSIXACL;
break;
#else
- btrfs_err(root->fs_info,
- "support for ACL not compiled in!");
+ btrfs_err(info, "support for ACL not compiled in!");
ret = -EINVAL;
goto out;
#endif
case Opt_noacl:
- root->fs_info->sb->s_flags &= ~MS_POSIXACL;
+ info->sb->s_flags &= ~MS_POSIXACL;
break;
case Opt_notreelog:
btrfs_set_and_info(info, NOTREELOG,
@@ -662,8 +650,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
goto out;
} else if (intarg >= 0) {
info->metadata_ratio = intarg;
- btrfs_info(root->fs_info, "metadata ratio %d",
- info->metadata_ratio);
+ btrfs_info(info, "metadata ratio %d",
+ info->metadata_ratio);
} else {
ret = -EINVAL;
goto out;
@@ -681,15 +669,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
case Opt_space_cache_version:
if (token == Opt_space_cache ||
strcmp(args[0].from, "v1") == 0) {
- btrfs_clear_opt(root->fs_info->mount_opt,
+ btrfs_clear_opt(info->mount_opt,
FREE_SPACE_TREE);
btrfs_set_and_info(info, SPACE_CACHE,
- "enabling disk space caching");
+ "enabling disk space caching");
} else if (strcmp(args[0].from, "v2") == 0) {
- btrfs_clear_opt(root->fs_info->mount_opt,
+ btrfs_clear_opt(info->mount_opt,
SPACE_CACHE);
- btrfs_set_and_info(info,
- FREE_SPACE_TREE,
+ btrfs_set_and_info(info, FREE_SPACE_TREE,
"enabling free space tree");
} else {
ret = -EINVAL;
@@ -701,14 +688,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
break;
case Opt_no_space_cache:
if (btrfs_test_opt(info, SPACE_CACHE)) {
- btrfs_clear_and_info(info,
- SPACE_CACHE,
- "disabling disk space caching");
+ btrfs_clear_and_info(info, SPACE_CACHE,
+ "disabling disk space caching");
}
if (btrfs_test_opt(info, FREE_SPACE_TREE)) {
- btrfs_clear_and_info(info,
- FREE_SPACE_TREE,
- "disabling free space tree");
+ btrfs_clear_and_info(info, FREE_SPACE_TREE,
+ "disabling free space tree");
}
break;
case Opt_inode_cache:
@@ -741,10 +726,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
"disabling auto defrag");
break;
case Opt_recovery:
- btrfs_warn(root->fs_info,
+ btrfs_warn(info,
"'recovery' is deprecated, use 'usebackuproot' instead");
case Opt_usebackuproot:
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"trying to use backup root at mount time");
btrfs_set_opt(info->mount_opt, USEBACKUPROOT);
break;
@@ -753,14 +738,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
break;
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
case Opt_check_integrity_including_extent_data:
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"enabling check integrity including extent data");
btrfs_set_opt(info->mount_opt,
CHECK_INTEGRITY_INCLUDING_EXTENT_DATA);
btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
break;
case Opt_check_integrity:
- btrfs_info(root->fs_info, "enabling check integrity");
+ btrfs_info(info, "enabling check integrity");
btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY);
break;
case Opt_check_integrity_print_mask:
@@ -769,7 +754,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
goto out;
} else if (intarg >= 0) {
info->check_integrity_print_mask = intarg;
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"check_integrity_print_mask 0x%x",
info->check_integrity_print_mask);
} else {
@@ -781,8 +766,8 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
case Opt_check_integrity_including_extent_data:
case Opt_check_integrity:
case Opt_check_integrity_print_mask:
- btrfs_err(root->fs_info,
- "support for check_integrity* not compiled in!");
+ btrfs_err(info,
+ "support for check_integrity* not compiled in!");
ret = -EINVAL;
goto out;
#endif
@@ -802,20 +787,19 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
intarg = 0;
ret = match_int(&args[0], &intarg);
if (ret < 0) {
- btrfs_err(root->fs_info,
- "invalid commit interval");
+ btrfs_err(info, "invalid commit interval");
ret = -EINVAL;
goto out;
}
if (intarg > 0) {
if (intarg > 300) {
- btrfs_warn(root->fs_info,
+ btrfs_warn(info,
"excessive commit interval %d",
intarg);
}
info->commit_interval = intarg;
} else {
- btrfs_info(root->fs_info,
+ btrfs_info(info,
"using default commit interval %ds",
BTRFS_DEFAULT_COMMIT_INTERVAL);
info->commit_interval = BTRFS_DEFAULT_COMMIT_INTERVAL;
@@ -823,23 +807,22 @@ int btrfs_parse_options(struct btrfs_root *root, char *options,
break;
#ifdef CONFIG_BTRFS_DEBUG
case Opt_fragment_all:
- btrfs_info(root->fs_info, "fragmenting all space");
+ btrfs_info(info, "fragmenting all space");
btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
btrfs_set_opt(info->mount_opt, FRAGMENT_METADATA);
break;
case Opt_fragment_metadata:
- btrfs_info(root->fs_info, "fragmenting metadata");
+ btrfs_info(info, "fragmenting metadata");
btrfs_set_opt(info->mount_opt,
FRAGMENT_METADATA);
break;
case Opt_fragment_data:
- btrfs_info(root->fs_info, "fragmenting data");
+ btrfs_info(info, "fragmenting data");
btrfs_set_opt(info->mount_opt, FRAGMENT_DATA);
break;
#endif
case Opt_err:
- btrfs_info(root->fs_info,
- "unrecognized mount option '%s'", p);
+ btrfs_info(info, "unrecognized mount option '%s'", p);
ret = -EINVAL;
goto out;
default:
@@ -851,22 +834,22 @@ check:
* Extra check for current option against current flag
*/
if (btrfs_test_opt(info, NOLOGREPLAY) && !(new_flags & MS_RDONLY)) {
- btrfs_err(root->fs_info,
+ btrfs_err(info,
"nologreplay must be used with ro mount option");
ret = -EINVAL;
}
out:
- if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE) &&
+ if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE) &&
!btrfs_test_opt(info, FREE_SPACE_TREE) &&
!btrfs_test_opt(info, CLEAR_CACHE)) {
- btrfs_err(root->fs_info, "cannot disable free space tree");
+ btrfs_err(info, "cannot disable free space tree");
ret = -EINVAL;
}
if (!ret && btrfs_test_opt(info, SPACE_CACHE))
- btrfs_info(root->fs_info, "disk space caching is enabled");
+ btrfs_info(info, "disk space caching is enabled");
if (!ret && btrfs_test_opt(info, FREE_SPACE_TREE))
- btrfs_info(root->fs_info, "using free space tree");
+ btrfs_info(info, "using free space tree");
kfree(orig);
return ret;
}
@@ -1177,7 +1160,7 @@ static int btrfs_fill_super(struct super_block *sb,
return 0;
fail_close:
- close_ctree(fs_info->tree_root);
+ close_ctree(fs_info);
return err;
}
@@ -1221,13 +1204,12 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
if (IS_ERR(trans))
return PTR_ERR(trans);
}
- return btrfs_commit_transaction(trans, root);
+ return btrfs_commit_transaction(trans);
}
static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
{
struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb);
- struct btrfs_root *root = info->tree_root;
char *compress_type;
if (btrfs_test_opt(info, DEGRADED))
@@ -1269,7 +1251,7 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",flushoncommit");
if (btrfs_test_opt(info, DISCARD))
seq_puts(seq, ",discard");
- if (!(root->fs_info->sb->s_flags & MS_POSIXACL))
+ if (!(info->sb->s_flags & MS_POSIXACL))
seq_puts(seq, ",noacl");
if (btrfs_test_opt(info, SPACE_CACHE))
seq_puts(seq, ",space_cache");
@@ -1748,7 +1730,7 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
}
}
- ret = btrfs_parse_options(root, data, *flags);
+ ret = btrfs_parse_options(fs_info, data, *flags);
if (ret) {
ret = -EINVAL;
goto restore;
@@ -1788,11 +1770,11 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
btrfs_scrub_cancel(fs_info);
btrfs_pause_balance(fs_info);
- ret = btrfs_commit_super(root);
+ ret = btrfs_commit_super(fs_info);
if (ret)
goto restore;
} else {
- if (test_bit(BTRFS_FS_STATE_ERROR, &root->fs_info->fs_state)) {
+ if (test_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state)) {
btrfs_err(fs_info,
"Remounting read-write after error is not allowed");
ret = -EINVAL;
@@ -1905,9 +1887,10 @@ static inline void btrfs_descending_sort_devices(
* The helper to calc the free space on the devices that can be used to store
* file data.
*/
-static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes)
+static int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info,
+ u64 *free_bytes)
{
- struct btrfs_fs_info *fs_info = root->fs_info;
+ struct btrfs_root *root = fs_info->tree_root;
struct btrfs_device_info *devices_info;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
@@ -2090,10 +2073,6 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
u64 thresh = 0;
int mixed = 0;
- /*
- * holding chunk_mutex to avoid allocating new chunks, holding
- * device_list_mutex to avoid the device being removed
- */
rcu_read_lock();
list_for_each_entry_rcu(found, head, list) {
if (found->flags & BTRFS_BLOCK_GROUP_DATA) {
@@ -2145,7 +2124,7 @@ static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf)
spin_unlock(&block_rsv->lock);
buf->f_bavail = div_u64(total_free_data, factor);
- ret = btrfs_calc_avail_data_space(fs_info->tree_root, &total_free_data);
+ ret = btrfs_calc_avail_data_space(fs_info, &total_free_data);
if (ret)
return ret;
buf->f_bavail += div_u64(total_free_data, factor);
@@ -2253,9 +2232,10 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
static int btrfs_freeze(struct super_block *sb)
{
struct btrfs_trans_handle *trans;
- struct btrfs_root *root = btrfs_sb(sb)->tree_root;
+ struct btrfs_fs_info *fs_info = btrfs_sb(sb);
+ struct btrfs_root *root = fs_info->tree_root;
- root->fs_info->fs_frozen = 1;
+ fs_info->fs_frozen = 1;
/*
* We don't need a barrier here, we'll wait for any transaction that
* could be in progress on other threads (and do delayed iputs that
@@ -2269,14 +2249,12 @@ static int btrfs_freeze(struct super_block *sb)
return 0;
return PTR_ERR(trans);
}
- return btrfs_commit_transaction(trans, root);
+ return btrfs_commit_transaction(trans);
}
static int btrfs_unfreeze(struct super_block *sb)
{
- struct btrfs_root *root = btrfs_sb(sb)->tree_root;
-
- root->fs_info->fs_frozen = 0;
+ btrfs_sb(sb)->fs_frozen = 0;
return 0;
}
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