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Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c116
1 files changed, 64 insertions, 52 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e21997385d14..952172ca7e45 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -240,7 +240,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
if (ret)
return ret;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
ip_oldflags = ip->flags;
i_oldflags = inode->i_flags;
@@ -358,7 +358,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
}
out_unlock:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
mnt_drop_write_file(file);
return ret;
}
@@ -568,6 +568,10 @@ static noinline int create_subvol(struct inode *dir,
goto fail;
}
+ mutex_lock(&new_root->objectid_mutex);
+ new_root->highest_objectid = new_dirid;
+ mutex_unlock(&new_root->objectid_mutex);
+
/*
* insert the directory item
*/
@@ -655,22 +659,28 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir,
if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
return -EINVAL;
+ pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
+ if (!pending_snapshot)
+ return -ENOMEM;
+
+ pending_snapshot->root_item = kzalloc(sizeof(struct btrfs_root_item),
+ GFP_NOFS);
+ pending_snapshot->path = btrfs_alloc_path();
+ if (!pending_snapshot->root_item || !pending_snapshot->path) {
+ ret = -ENOMEM;
+ goto free_pending;
+ }
+
atomic_inc(&root->will_be_snapshoted);
smp_mb__after_atomic();
btrfs_wait_for_no_snapshoting_writes(root);
ret = btrfs_start_delalloc_inodes(root, 0);
if (ret)
- goto out;
+ goto dec_and_free;
btrfs_wait_ordered_extents(root, -1);
- pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
- if (!pending_snapshot) {
- ret = -ENOMEM;
- goto out;
- }
-
btrfs_init_block_rsv(&pending_snapshot->block_rsv,
BTRFS_BLOCK_RSV_TEMP);
/*
@@ -686,7 +696,7 @@ static int create_snapshot(struct btrfs_root *root, struct inode *dir,
&pending_snapshot->qgroup_reserved,
false);
if (ret)
- goto free;
+ goto dec_and_free;
pending_snapshot->dentry = dentry;
pending_snapshot->root = root;
@@ -737,11 +747,14 @@ fail:
btrfs_subvolume_release_metadata(BTRFS_I(dir)->root,
&pending_snapshot->block_rsv,
pending_snapshot->qgroup_reserved);
-free:
- kfree(pending_snapshot);
-out:
+dec_and_free:
if (atomic_dec_and_test(&root->will_be_snapshoted))
wake_up_atomic_t(&root->will_be_snapshoted);
+free_pending:
+ kfree(pending_snapshot->root_item);
+ btrfs_free_path(pending_snapshot->path);
+ kfree(pending_snapshot);
+
return ret;
}
@@ -868,7 +881,7 @@ out_up_read:
out_dput:
dput(dentry);
out_unlock:
- mutex_unlock(&dir->i_mutex);
+ inode_unlock(dir);
return error;
}
@@ -992,7 +1005,7 @@ static struct extent_map *defrag_lookup_extent(struct inode *inode, u64 start)
u64 end = start + len - 1;
/* get the big lock and read metadata off disk */
- lock_extent_bits(io_tree, start, end, 0, &cached);
+ lock_extent_bits(io_tree, start, end, &cached);
em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
unlock_extent_cached(io_tree, start, end, &cached, GFP_NOFS);
@@ -1016,7 +1029,7 @@ static bool defrag_check_next_extent(struct inode *inode, struct extent_map *em)
if (!next || next->block_start >= EXTENT_MAP_LAST_BYTE)
ret = false;
else if ((em->block_start + em->block_len == next->block_start) &&
- (em->block_len > 128 * 1024 && next->block_len > 128 * 1024))
+ (em->block_len > SZ_128K && next->block_len > SZ_128K))
ret = false;
free_extent_map(next);
@@ -1140,7 +1153,7 @@ again:
page_end = page_start + PAGE_CACHE_SIZE - 1;
while (1) {
lock_extent_bits(tree, page_start, page_end,
- 0, &cached_state);
+ &cached_state);
ordered = btrfs_lookup_ordered_extent(inode,
page_start);
unlock_extent_cached(tree, page_start, page_end,
@@ -1200,7 +1213,7 @@ again:
page_end = page_offset(pages[i_done - 1]) + PAGE_CACHE_SIZE;
lock_extent_bits(&BTRFS_I(inode)->io_tree,
- page_start, page_end - 1, 0, &cached_state);
+ page_start, page_end - 1, &cached_state);
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start,
page_end - 1, EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG, 0, 0,
@@ -1262,9 +1275,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
int defrag_count = 0;
int compress_type = BTRFS_COMPRESS_ZLIB;
u32 extent_thresh = range->extent_thresh;
- unsigned long max_cluster = (256 * 1024) >> PAGE_CACHE_SHIFT;
+ unsigned long max_cluster = SZ_256K >> PAGE_CACHE_SHIFT;
unsigned long cluster = max_cluster;
- u64 new_align = ~((u64)128 * 1024 - 1);
+ u64 new_align = ~((u64)SZ_128K - 1);
struct page **pages = NULL;
if (isize == 0)
@@ -1281,7 +1294,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
}
if (extent_thresh == 0)
- extent_thresh = 256 * 1024;
+ extent_thresh = SZ_256K;
/*
* if we were not given a file, allocate a readahead
@@ -1313,7 +1326,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
if (newer_than) {
ret = find_new_extents(root, inode, newer_than,
- &newer_off, 64 * 1024);
+ &newer_off, SZ_64K);
if (!ret) {
range->start = newer_off;
/*
@@ -1380,18 +1393,18 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
ra_index += cluster;
}
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS)
BTRFS_I(inode)->force_compress = compress_type;
ret = cluster_pages_for_defrag(inode, pages, i, cluster);
if (ret < 0) {
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
goto out_ra;
}
defrag_count += ret;
balance_dirty_pages_ratelimited(inode->i_mapping);
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
if (newer_than) {
if (newer_off == (u64)-1)
@@ -1403,9 +1416,8 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
newer_off = max(newer_off + 1,
(u64)i << PAGE_CACHE_SHIFT);
- ret = find_new_extents(root, inode,
- newer_than, &newer_off,
- 64 * 1024);
+ ret = find_new_extents(root, inode, newer_than,
+ &newer_off, SZ_64K);
if (!ret) {
range->start = newer_off;
i = (newer_off & new_align) >> PAGE_CACHE_SHIFT;
@@ -1453,9 +1465,9 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
out_ra:
if (range->flags & BTRFS_DEFRAG_RANGE_COMPRESS) {
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
BTRFS_I(inode)->force_compress = BTRFS_COMPRESS_NONE;
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
}
if (!file)
kfree(ra);
@@ -1571,7 +1583,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
new_size = old_size + new_size;
}
- if (new_size < 256 * 1024 * 1024) {
+ if (new_size < SZ_256M) {
ret = -EINVAL;
goto out_free;
}
@@ -2160,7 +2172,7 @@ static noinline int btrfs_ioctl_tree_search_v2(struct file *file,
struct inode *inode;
int ret;
size_t buf_size;
- const size_t buf_limit = 16 * 1024 * 1024;
+ const size_t buf_limit = SZ_16M;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -2418,7 +2430,7 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
goto out_dput;
}
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
/*
* Don't allow to delete a subvolume with send in progress. This is
@@ -2531,7 +2543,7 @@ out_up_write:
spin_unlock(&dest->root_item_lock);
}
out_unlock_inode:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
if (!err) {
d_invalidate(dentry);
btrfs_invalidate_inodes(dest);
@@ -2547,7 +2559,7 @@ out_unlock_inode:
out_dput:
dput(dentry);
out_unlock_dir:
- mutex_unlock(&dir->i_mutex);
+ inode_unlock(dir);
out_drop_write:
mnt_drop_write_file(file);
out:
@@ -2845,8 +2857,8 @@ static inline void lock_extent_range(struct inode *inode, u64 off, u64 len)
static void btrfs_double_inode_unlock(struct inode *inode1, struct inode *inode2)
{
- mutex_unlock(&inode1->i_mutex);
- mutex_unlock(&inode2->i_mutex);
+ inode_unlock(inode1);
+ inode_unlock(inode2);
}
static void btrfs_double_inode_lock(struct inode *inode1, struct inode *inode2)
@@ -2854,8 +2866,8 @@ static void btrfs_double_inode_lock(struct inode *inode1, struct inode *inode2)
if (inode1 < inode2)
swap(inode1, inode2);
- mutex_lock_nested(&inode1->i_mutex, I_MUTEX_PARENT);
- mutex_lock_nested(&inode2->i_mutex, I_MUTEX_CHILD);
+ inode_lock_nested(inode1, I_MUTEX_PARENT);
+ inode_lock_nested(inode2, I_MUTEX_CHILD);
}
static void btrfs_double_extent_unlock(struct inode *inode1, u64 loff1,
@@ -3014,7 +3026,7 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
return 0;
if (same_inode) {
- mutex_lock(&src->i_mutex);
+ inode_lock(src);
ret = extent_same_check_offsets(src, loff, &len, olen);
if (ret)
@@ -3089,14 +3101,14 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
btrfs_cmp_data_free(&cmp);
out_unlock:
if (same_inode)
- mutex_unlock(&src->i_mutex);
+ inode_unlock(src);
else
btrfs_double_inode_unlock(src, dst);
return ret;
}
-#define BTRFS_MAX_DEDUPE_LEN (16 * 1024 * 1024)
+#define BTRFS_MAX_DEDUPE_LEN SZ_16M
ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen,
struct file *dst_file, u64 dst_loff)
@@ -3396,7 +3408,7 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
return ret;
}
- path->reada = 2;
+ path->reada = READA_FORWARD;
/* clone data */
key.objectid = btrfs_ino(src);
key.type = BTRFS_EXTENT_DATA_KEY;
@@ -3737,7 +3749,7 @@ static noinline int btrfs_clone_files(struct file *file, struct file *file_src,
if (!same_inode) {
btrfs_double_inode_lock(src, inode);
} else {
- mutex_lock(&src->i_mutex);
+ inode_lock(src);
}
/* determine range to clone */
@@ -3808,7 +3820,7 @@ out_unlock:
if (!same_inode)
btrfs_double_inode_unlock(src, inode);
else
- mutex_unlock(&src->i_mutex);
+ inode_unlock(src);
return ret;
}
@@ -4039,7 +4051,7 @@ static long btrfs_ioctl_space_info(struct btrfs_root *root, void __user *arg)
return -ENOMEM;
space_args.total_spaces = 0;
- dest = kmalloc(alloc_size, GFP_NOFS);
+ dest = kmalloc(alloc_size, GFP_KERNEL);
if (!dest)
return -ENOMEM;
dest_orig = dest;
@@ -4416,7 +4428,7 @@ static long btrfs_ioctl_logical_to_ino(struct btrfs_root *root,
goto out;
}
- size = min_t(u32, loi->size, 64 * 1024);
+ size = min_t(u32, loi->size, SZ_64K);
inodes = init_data_container(size);
if (IS_ERR(inodes)) {
ret = PTR_ERR(inodes);
@@ -4565,7 +4577,7 @@ locked:
goto out_bargs;
}
- bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
+ bctl = kzalloc(sizeof(*bctl), GFP_KERNEL);
if (!bctl) {
ret = -ENOMEM;
goto out_bargs;
@@ -4651,7 +4663,7 @@ static long btrfs_ioctl_balance_progress(struct btrfs_root *root,
goto out;
}
- bargs = kzalloc(sizeof(*bargs), GFP_NOFS);
+ bargs = kzalloc(sizeof(*bargs), GFP_KERNEL);
if (!bargs) {
ret = -ENOMEM;
goto out;
@@ -4911,7 +4923,7 @@ static long btrfs_ioctl_quota_rescan_status(struct file *file, void __user *arg)
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- qsa = kzalloc(sizeof(*qsa), GFP_NOFS);
+ qsa = kzalloc(sizeof(*qsa), GFP_KERNEL);
if (!qsa)
return -ENOMEM;
@@ -5041,7 +5053,7 @@ static long btrfs_ioctl_set_received_subvol_32(struct file *file,
goto out;
}
- args64 = kmalloc(sizeof(*args64), GFP_NOFS);
+ args64 = kmalloc(sizeof(*args64), GFP_KERNEL);
if (!args64) {
ret = -ENOMEM;
goto out;
@@ -5178,7 +5190,7 @@ out_unlock:
static int btrfs_ioctl_get_supported_features(struct file *file,
void __user *arg)
{
- static struct btrfs_ioctl_feature_flags features[3] = {
+ static const struct btrfs_ioctl_feature_flags features[3] = {
INIT_FEATURE_FLAGS(SUPP),
INIT_FEATURE_FLAGS(SAFE_SET),
INIT_FEATURE_FLAGS(SAFE_CLEAR)
generated by cgit v1.2.3 (git 2.46.0) at 2025-04-26 01:44:07 +0000