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authorChris Mason <chris.mason@oracle.com>2012-03-28 20:32:46 -0400
committerChris Mason <chris.mason@oracle.com>2012-03-28 20:32:46 -0400
commit1c691b330a19a1344df89bcb0f4cacd99e8b289a (patch)
treeb3143a9875a773d33b9b8f60e98c7e5fae003b6a /fs/btrfs
parent1d4284bd6e8d7dd1d5521a6747bdb6dc1caf0225 (diff)
parent213e64da90d14537cd63f7090d6c4d1fcc75d9f8 (diff)
downloadlinux-stericsson-1c691b330a19a1344df89bcb0f4cacd99e8b289a.tar.gz
Merge branch 'for-chris' of git://github.com/idryomov/btrfs-unstable into for-linus
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/backref.c7
-rw-r--r--fs/btrfs/ctree.h33
-rw-r--r--fs/btrfs/extent-tree.c163
-rw-r--r--fs/btrfs/volumes.c93
4 files changed, 157 insertions, 139 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 0436c12da8c2..4c79547f4a0c 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1342,12 +1342,6 @@ int paths_from_inode(u64 inum, struct inode_fs_paths *ipath)
inode_to_path, ipath);
}
-/*
- * allocates space to return multiple file system paths for an inode.
- * total_bytes to allocate are passed, note that space usable for actual path
- * information will be total_bytes - sizeof(struct inode_fs_paths).
- * the returned pointer must be freed with free_ipath() in the end.
- */
struct btrfs_data_container *init_data_container(u32 total_bytes)
{
struct btrfs_data_container *data;
@@ -1403,5 +1397,6 @@ struct inode_fs_paths *init_ipath(s32 total_bytes, struct btrfs_root *fs_root,
void free_ipath(struct inode_fs_paths *ipath)
{
+ kfree(ipath->fspath);
kfree(ipath);
}
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ed2d196f7a84..5b8ef8eb3521 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -851,6 +851,21 @@ struct btrfs_csum_item {
*/
#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
+#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | \
+ BTRFS_AVAIL_ALLOC_BIT_SINGLE)
+
+static inline u64 chunk_to_extended(u64 flags)
+{
+ if ((flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0)
+ flags |= BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+
+ return flags;
+}
+static inline u64 extended_to_chunk(u64 flags)
+{
+ return flags & ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+}
+
struct btrfs_block_group_item {
__le64 used;
__le64 chunk_objectid;
@@ -2723,24 +2738,6 @@ static inline void free_fs_info(struct btrfs_fs_info *fs_info)
kfree(fs_info->super_for_commit);
kfree(fs_info);
}
-/**
- * profile_is_valid - tests whether a given profile is valid and reduced
- * @flags: profile to validate
- * @extended: if true @flags is treated as an extended profile
- */
-static inline int profile_is_valid(u64 flags, int extended)
-{
- u64 mask = ~BTRFS_BLOCK_GROUP_PROFILE_MASK;
-
- flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
- if (extended)
- mask &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
-
- if (flags & mask)
- return 0;
- /* true if zero or exactly one bit set */
- return (flags & (~flags + 1)) == flags;
-}
/* root-item.c */
int btrfs_find_root_ref(struct btrfs_root *tree_root,
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 8b304e3537c4..8fe517bd8521 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3138,11 +3138,8 @@ static int update_space_info(struct btrfs_fs_info *info, u64 flags,
static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags)
{
- u64 extra_flags = flags & BTRFS_BLOCK_GROUP_PROFILE_MASK;
-
- /* chunk -> extended profile */
- if (extra_flags == 0)
- extra_flags = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+ u64 extra_flags = chunk_to_extended(flags) &
+ BTRFS_EXTENDED_PROFILE_MASK;
if (flags & BTRFS_BLOCK_GROUP_DATA)
fs_info->avail_data_alloc_bits |= extra_flags;
@@ -3153,6 +3150,35 @@ static void set_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags)
}
/*
+ * returns target flags in extended format or 0 if restripe for this
+ * chunk_type is not in progress
+ */
+static u64 get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags)
+{
+ struct btrfs_balance_control *bctl = fs_info->balance_ctl;
+ u64 target = 0;
+
+ BUG_ON(!mutex_is_locked(&fs_info->volume_mutex) &&
+ !spin_is_locked(&fs_info->balance_lock));
+
+ if (!bctl)
+ return 0;
+
+ if (flags & BTRFS_BLOCK_GROUP_DATA &&
+ bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) {
+ target = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
+ } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM &&
+ bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
+ target = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
+ } else if (flags & BTRFS_BLOCK_GROUP_METADATA &&
+ bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) {
+ target = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
+ }
+
+ return target;
+}
+
+/*
* @flags: available profiles in extended format (see ctree.h)
*
* Returns reduced profile in chunk format. If profile changing is in
@@ -3168,31 +3194,19 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
*/
u64 num_devices = root->fs_info->fs_devices->rw_devices +
root->fs_info->fs_devices->missing_devices;
+ u64 target;
- /* pick restriper's target profile if it's available */
+ /*
+ * see if restripe for this chunk_type is in progress, if so
+ * try to reduce to the target profile
+ */
spin_lock(&root->fs_info->balance_lock);
- if (root->fs_info->balance_ctl) {
- struct btrfs_balance_control *bctl = root->fs_info->balance_ctl;
- u64 tgt = 0;
-
- if ((flags & BTRFS_BLOCK_GROUP_DATA) &&
- (bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (flags & bctl->data.target)) {
- tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
- } else if ((flags & BTRFS_BLOCK_GROUP_SYSTEM) &&
- (bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (flags & bctl->sys.target)) {
- tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
- } else if ((flags & BTRFS_BLOCK_GROUP_METADATA) &&
- (bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
- (flags & bctl->meta.target)) {
- tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
- }
-
- if (tgt) {
+ target = get_restripe_target(root->fs_info, flags);
+ if (target) {
+ /* pick target profile only if it's already available */
+ if ((flags & target) & BTRFS_EXTENDED_PROFILE_MASK) {
spin_unlock(&root->fs_info->balance_lock);
- flags = tgt;
- goto out;
+ return extended_to_chunk(target);
}
}
spin_unlock(&root->fs_info->balance_lock);
@@ -3220,10 +3234,7 @@ u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags)
flags &= ~BTRFS_BLOCK_GROUP_RAID0;
}
-out:
- /* extended -> chunk profile */
- flags &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
- return flags;
+ return extended_to_chunk(flags);
}
static u64 get_alloc_profile(struct btrfs_root *root, u64 flags)
@@ -3445,8 +3456,6 @@ static int do_chunk_alloc(struct btrfs_trans_handle *trans,
int wait_for_alloc = 0;
int ret = 0;
- BUG_ON(!profile_is_valid(flags, 0));
-
space_info = __find_space_info(extent_root->fs_info, flags);
if (!space_info) {
ret = update_space_info(extent_root->fs_info, flags,
@@ -5300,22 +5309,29 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache)
return 0;
}
-static int get_block_group_index(struct btrfs_block_group_cache *cache)
+static int __get_block_group_index(u64 flags)
{
int index;
- if (cache->flags & BTRFS_BLOCK_GROUP_RAID10)
+
+ if (flags & BTRFS_BLOCK_GROUP_RAID10)
index = 0;
- else if (cache->flags & BTRFS_BLOCK_GROUP_RAID1)
+ else if (flags & BTRFS_BLOCK_GROUP_RAID1)
index = 1;
- else if (cache->flags & BTRFS_BLOCK_GROUP_DUP)
+ else if (flags & BTRFS_BLOCK_GROUP_DUP)
index = 2;
- else if (cache->flags & BTRFS_BLOCK_GROUP_RAID0)
+ else if (flags & BTRFS_BLOCK_GROUP_RAID0)
index = 3;
else
index = 4;
+
return index;
}
+static int get_block_group_index(struct btrfs_block_group_cache *cache)
+{
+ return __get_block_group_index(cache->flags);
+}
+
enum btrfs_loop_type {
LOOP_CACHING_NOWAIT = 0,
LOOP_CACHING_WAIT = 1,
@@ -7011,31 +7027,15 @@ int btrfs_drop_subtree(struct btrfs_trans_handle *trans,
static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
{
u64 num_devices;
- u64 stripped = BTRFS_BLOCK_GROUP_RAID0 |
- BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10;
-
- if (root->fs_info->balance_ctl) {
- struct btrfs_balance_control *bctl = root->fs_info->balance_ctl;
- u64 tgt = 0;
-
- /* pick restriper's target profile and return */
- if (flags & BTRFS_BLOCK_GROUP_DATA &&
- bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) {
- tgt = BTRFS_BLOCK_GROUP_DATA | bctl->data.target;
- } else if (flags & BTRFS_BLOCK_GROUP_SYSTEM &&
- bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) {
- tgt = BTRFS_BLOCK_GROUP_SYSTEM | bctl->sys.target;
- } else if (flags & BTRFS_BLOCK_GROUP_METADATA &&
- bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) {
- tgt = BTRFS_BLOCK_GROUP_METADATA | bctl->meta.target;
- }
+ u64 stripped;
- if (tgt) {
- /* extended -> chunk profile */
- tgt &= ~BTRFS_AVAIL_ALLOC_BIT_SINGLE;
- return tgt;
- }
- }
+ /*
+ * if restripe for this chunk_type is on pick target profile and
+ * return, otherwise do the usual balance
+ */
+ stripped = get_restripe_target(root->fs_info, flags);
+ if (stripped)
+ return extended_to_chunk(stripped);
/*
* we add in the count of missing devices because we want
@@ -7045,6 +7045,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
num_devices = root->fs_info->fs_devices->rw_devices +
root->fs_info->fs_devices->missing_devices;
+ stripped = BTRFS_BLOCK_GROUP_RAID0 |
+ BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID10;
+
if (num_devices == 1) {
stripped |= BTRFS_BLOCK_GROUP_DUP;
stripped = flags & ~stripped;
@@ -7057,7 +7060,6 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
if (flags & (BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10))
return stripped | BTRFS_BLOCK_GROUP_DUP;
- return flags;
} else {
/* they already had raid on here, just return */
if (flags & stripped)
@@ -7070,9 +7072,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags)
if (flags & BTRFS_BLOCK_GROUP_DUP)
return stripped | BTRFS_BLOCK_GROUP_RAID1;
- /* turn single device chunks into raid0 */
- return stripped | BTRFS_BLOCK_GROUP_RAID0;
+ /* this is drive concat, leave it alone */
}
+
return flags;
}
@@ -7253,6 +7255,7 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
u64 min_free;
u64 dev_min = 1;
u64 dev_nr = 0;
+ u64 target;
int index;
int full = 0;
int ret = 0;
@@ -7293,13 +7296,11 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
/*
* ok we don't have enough space, but maybe we have free space on our
* devices to allocate new chunks for relocation, so loop through our
- * alloc devices and guess if we have enough space. However, if we
- * were marked as full, then we know there aren't enough chunks, and we
- * can just return.
+ * alloc devices and guess if we have enough space. if this block
+ * group is going to be restriped, run checks against the target
+ * profile instead of the current one.
*/
ret = -1;
- if (full)
- goto out;
/*
* index:
@@ -7309,7 +7310,20 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
* 3: raid0
* 4: single
*/
- index = get_block_group_index(block_group);
+ target = get_restripe_target(root->fs_info, block_group->flags);
+ if (target) {
+ index = __get_block_group_index(extended_to_chunk(target));
+ } else {
+ /*
+ * this is just a balance, so if we were marked as full
+ * we know there is no space for a new chunk
+ */
+ if (full)
+ goto out;
+
+ index = get_block_group_index(block_group);
+ }
+
if (index == 0) {
dev_min = 4;
/* Divide by 2 */
@@ -7720,11 +7734,8 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans,
static void clear_avail_alloc_bits(struct btrfs_fs_info *fs_info, u64 flags)
{
- u64 extra_flags = flags & BTRFS_BLOCK_GROUP_PROFILE_MASK;
-
- /* chunk -> extended profile */
- if (extra_flags == 0)
- extra_flags = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+ u64 extra_flags = chunk_to_extended(flags) &
+ BTRFS_EXTENDED_PROFILE_MASK;
if (flags & BTRFS_BLOCK_GROUP_DATA)
fs_info->avail_data_alloc_bits &= ~extra_flags;
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index d64cd6cbdbb6..68a1754fe367 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2282,15 +2282,13 @@ static void unset_balance_control(struct btrfs_fs_info *fs_info)
* Balance filters. Return 1 if chunk should be filtered out
* (should not be balanced).
*/
-static int chunk_profiles_filter(u64 chunk_profile,
+static int chunk_profiles_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
- chunk_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
+ chunk_type = chunk_to_extended(chunk_type) &
+ BTRFS_EXTENDED_PROFILE_MASK;
- if (chunk_profile == 0)
- chunk_profile = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
-
- if (bargs->profiles & chunk_profile)
+ if (bargs->profiles & chunk_type)
return 0;
return 1;
@@ -2397,18 +2395,16 @@ static int chunk_vrange_filter(struct extent_buffer *leaf,
return 1;
}
-static int chunk_soft_convert_filter(u64 chunk_profile,
+static int chunk_soft_convert_filter(u64 chunk_type,
struct btrfs_balance_args *bargs)
{
if (!(bargs->flags & BTRFS_BALANCE_ARGS_CONVERT))
return 0;
- chunk_profile &= BTRFS_BLOCK_GROUP_PROFILE_MASK;
-
- if (chunk_profile == 0)
- chunk_profile = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
+ chunk_type = chunk_to_extended(chunk_type) &
+ BTRFS_EXTENDED_PROFILE_MASK;
- if (bargs->target & chunk_profile)
+ if (bargs->target == chunk_type)
return 1;
return 0;
@@ -2634,6 +2630,30 @@ error:
return ret;
}
+/**
+ * alloc_profile_is_valid - see if a given profile is valid and reduced
+ * @flags: profile to validate
+ * @extended: if true @flags is treated as an extended profile
+ */
+static int alloc_profile_is_valid(u64 flags, int extended)
+{
+ u64 mask = (extended ? BTRFS_EXTENDED_PROFILE_MASK :
+ BTRFS_BLOCK_GROUP_PROFILE_MASK);
+
+ flags &= ~BTRFS_BLOCK_GROUP_TYPE_MASK;
+
+ /* 1) check that all other bits are zeroed */
+ if (flags & ~mask)
+ return 0;
+
+ /* 2) see if profile is reduced */
+ if (flags == 0)
+ return !extended; /* "0" is valid for usual profiles */
+
+ /* true if exactly one bit set */
+ return (flags & (flags - 1)) == 0;
+}
+
static inline int balance_need_close(struct btrfs_fs_info *fs_info)
{
/* cancel requested || normal exit path */
@@ -2662,6 +2682,7 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
{
struct btrfs_fs_info *fs_info = bctl->fs_info;
u64 allowed;
+ int mixed = 0;
int ret;
if (btrfs_fs_closing(fs_info) ||
@@ -2671,13 +2692,16 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
goto out;
}
+ allowed = btrfs_super_incompat_flags(fs_info->super_copy);
+ if (allowed & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+ mixed = 1;
+
/*
* In case of mixed groups both data and meta should be picked,
* and identical options should be given for both of them.
*/
- allowed = btrfs_super_incompat_flags(fs_info->super_copy);
- if ((allowed & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS) &&
- (bctl->flags & (BTRFS_BALANCE_DATA | BTRFS_BALANCE_METADATA))) {
+ allowed = BTRFS_BALANCE_DATA | BTRFS_BALANCE_METADATA;
+ if (mixed && (bctl->flags & allowed)) {
if (!(bctl->flags & BTRFS_BALANCE_DATA) ||
!(bctl->flags & BTRFS_BALANCE_METADATA) ||
memcmp(&bctl->data, &bctl->meta, sizeof(bctl->data))) {
@@ -2688,14 +2712,6 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
}
}
- /*
- * Profile changing sanity checks. Skip them if a simple
- * balance is requested.
- */
- if (!((bctl->data.flags | bctl->sys.flags | bctl->meta.flags) &
- BTRFS_BALANCE_ARGS_CONVERT))
- goto do_balance;
-
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
if (fs_info->fs_devices->num_devices == 1)
allowed |= BTRFS_BLOCK_GROUP_DUP;
@@ -2705,24 +2721,27 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
BTRFS_BLOCK_GROUP_RAID10);
- if (!profile_is_valid(bctl->data.target, 1) ||
- bctl->data.target & ~allowed) {
+ if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (!alloc_profile_is_valid(bctl->data.target, 1) ||
+ (bctl->data.target & ~allowed))) {
printk(KERN_ERR "btrfs: unable to start balance with target "
"data profile %llu\n",
(unsigned long long)bctl->data.target);
ret = -EINVAL;
goto out;
}
- if (!profile_is_valid(bctl->meta.target, 1) ||
- bctl->meta.target & ~allowed) {
+ if ((bctl->meta.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (!alloc_profile_is_valid(bctl->meta.target, 1) ||
+ (bctl->meta.target & ~allowed))) {
printk(KERN_ERR "btrfs: unable to start balance with target "
"metadata profile %llu\n",
(unsigned long long)bctl->meta.target);
ret = -EINVAL;
goto out;
}
- if (!profile_is_valid(bctl->sys.target, 1) ||
- bctl->sys.target & ~allowed) {
+ if ((bctl->sys.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (!alloc_profile_is_valid(bctl->sys.target, 1) ||
+ (bctl->sys.target & ~allowed))) {
printk(KERN_ERR "btrfs: unable to start balance with target "
"system profile %llu\n",
(unsigned long long)bctl->sys.target);
@@ -2730,7 +2749,9 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
goto out;
}
- if (bctl->data.target & BTRFS_BLOCK_GROUP_DUP) {
+ /* allow dup'ed data chunks only in mixed mode */
+ if (!mixed && (bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
+ (bctl->data.target & BTRFS_BLOCK_GROUP_DUP)) {
printk(KERN_ERR "btrfs: dup for data is not allowed\n");
ret = -EINVAL;
goto out;
@@ -2756,7 +2777,6 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
}
}
-do_balance:
ret = insert_balance_item(fs_info->tree_root, bctl);
if (ret && ret != -EEXIST)
goto out;
@@ -2999,7 +3019,7 @@ again:
key.offset = (u64)-1;
key.type = BTRFS_DEV_EXTENT_KEY;
- while (1) {
+ do {
ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
if (ret < 0)
goto done;
@@ -3041,8 +3061,7 @@ again:
goto done;
if (ret == -ENOSPC)
failed++;
- key.offset -= 1;
- }
+ } while (key.offset-- > 0);
if (failed && !retried) {
failed = 0;
@@ -3160,11 +3179,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
int i;
int j;
- if ((type & BTRFS_BLOCK_GROUP_RAID1) &&
- (type & BTRFS_BLOCK_GROUP_DUP)) {
- WARN_ON(1);
- type &= ~BTRFS_BLOCK_GROUP_DUP;
- }
+ BUG_ON(!alloc_profile_is_valid(type, 0));
if (list_empty(&fs_devices->alloc_list))
return -ENOSPC;