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Diffstat (limited to 'fs/btrfs/send.c')
-rw-r--r--fs/btrfs/send.c79
1 files changed, 18 insertions, 61 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index a055b657cb85..c5f41bd86765 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -5586,10 +5586,7 @@ static int get_last_extent(struct send_ctx *sctx, u64 offset)
{
struct btrfs_path *path;
struct btrfs_root *root = sctx->send_root;
- struct btrfs_file_extent_item *fi;
struct btrfs_key key;
- u64 extent_end;
- u8 type;
int ret;
path = alloc_path_for_send();
@@ -5609,18 +5606,7 @@ static int get_last_extent(struct send_ctx *sctx, u64 offset)
if (key.objectid != sctx->cur_ino || key.type != BTRFS_EXTENT_DATA_KEY)
goto out;
- fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_file_extent_item);
- type = btrfs_file_extent_type(path->nodes[0], fi);
- if (type == BTRFS_FILE_EXTENT_INLINE) {
- u64 size = btrfs_file_extent_ram_bytes(path->nodes[0], fi);
- extent_end = ALIGN(key.offset + size,
- sctx->send_root->fs_info->sectorsize);
- } else {
- extent_end = key.offset +
- btrfs_file_extent_num_bytes(path->nodes[0], fi);
- }
- sctx->cur_inode_last_extent = extent_end;
+ sctx->cur_inode_last_extent = btrfs_file_extent_end(path);
out:
btrfs_free_path(path);
return ret;
@@ -5674,16 +5660,7 @@ static int range_is_hole_in_parent(struct send_ctx *sctx,
break;
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(leaf, fi) ==
- BTRFS_FILE_EXTENT_INLINE) {
- u64 size = btrfs_file_extent_ram_bytes(leaf, fi);
-
- extent_end = ALIGN(key.offset + size,
- root->fs_info->sectorsize);
- } else {
- extent_end = key.offset +
- btrfs_file_extent_num_bytes(leaf, fi);
- }
+ extent_end = btrfs_file_extent_end(path);
if (extent_end <= start)
goto next;
if (btrfs_file_extent_disk_bytenr(leaf, fi) == 0) {
@@ -5704,9 +5681,6 @@ out:
static int maybe_send_hole(struct send_ctx *sctx, struct btrfs_path *path,
struct btrfs_key *key)
{
- struct btrfs_file_extent_item *fi;
- u64 extent_end;
- u8 type;
int ret = 0;
if (sctx->cur_ino != key->objectid || !need_send_hole(sctx))
@@ -5718,18 +5692,6 @@ static int maybe_send_hole(struct send_ctx *sctx, struct btrfs_path *path,
return ret;
}
- fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_file_extent_item);
- type = btrfs_file_extent_type(path->nodes[0], fi);
- if (type == BTRFS_FILE_EXTENT_INLINE) {
- u64 size = btrfs_file_extent_ram_bytes(path->nodes[0], fi);
- extent_end = ALIGN(key->offset + size,
- sctx->send_root->fs_info->sectorsize);
- } else {
- extent_end = key->offset +
- btrfs_file_extent_num_bytes(path->nodes[0], fi);
- }
-
if (path->slots[0] == 0 &&
sctx->cur_inode_last_extent < key->offset) {
/*
@@ -5755,7 +5717,7 @@ static int maybe_send_hole(struct send_ctx *sctx, struct btrfs_path *path,
else
ret = 0;
}
- sctx->cur_inode_last_extent = extent_end;
+ sctx->cur_inode_last_extent = btrfs_file_extent_end(path);
return ret;
}
@@ -7066,7 +7028,6 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
int clone_sources_to_rollback = 0;
unsigned alloc_size;
int sort_clone_roots = 0;
- int index;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
@@ -7193,11 +7154,8 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
- index = srcu_read_lock(&fs_info->subvol_srcu);
-
- clone_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ clone_root = btrfs_get_fs_root(fs_info, &key, true);
if (IS_ERR(clone_root)) {
- srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = PTR_ERR(clone_root);
goto out;
}
@@ -7205,20 +7163,19 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
if (!btrfs_root_readonly(clone_root) ||
btrfs_root_dead(clone_root)) {
spin_unlock(&clone_root->root_item_lock);
- srcu_read_unlock(&fs_info->subvol_srcu, index);
+ btrfs_put_root(clone_root);
ret = -EPERM;
goto out;
}
if (clone_root->dedupe_in_progress) {
dedupe_in_progress_warn(clone_root);
spin_unlock(&clone_root->root_item_lock);
- srcu_read_unlock(&fs_info->subvol_srcu, index);
+ btrfs_put_root(clone_root);
ret = -EAGAIN;
goto out;
}
clone_root->send_in_progress++;
spin_unlock(&clone_root->root_item_lock);
- srcu_read_unlock(&fs_info->subvol_srcu, index);
sctx->clone_roots[i].root = clone_root;
clone_sources_to_rollback = i + 1;
@@ -7232,11 +7189,8 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
- index = srcu_read_lock(&fs_info->subvol_srcu);
-
- sctx->parent_root = btrfs_read_fs_root_no_name(fs_info, &key);
+ sctx->parent_root = btrfs_get_fs_root(fs_info, &key, true);
if (IS_ERR(sctx->parent_root)) {
- srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = PTR_ERR(sctx->parent_root);
goto out;
}
@@ -7246,20 +7200,16 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
if (!btrfs_root_readonly(sctx->parent_root) ||
btrfs_root_dead(sctx->parent_root)) {
spin_unlock(&sctx->parent_root->root_item_lock);
- srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = -EPERM;
goto out;
}
if (sctx->parent_root->dedupe_in_progress) {
dedupe_in_progress_warn(sctx->parent_root);
spin_unlock(&sctx->parent_root->root_item_lock);
- srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = -EAGAIN;
goto out;
}
spin_unlock(&sctx->parent_root->root_item_lock);
-
- srcu_read_unlock(&fs_info->subvol_srcu, index);
}
/*
@@ -7267,7 +7217,8 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
* is behind the current send position. This is checked while searching
* for possible clone sources.
*/
- sctx->clone_roots[sctx->clone_roots_cnt++].root = sctx->send_root;
+ sctx->clone_roots[sctx->clone_roots_cnt++].root =
+ btrfs_grab_root(sctx->send_root);
/* We do a bsearch later */
sort(sctx->clone_roots, sctx->clone_roots_cnt,
@@ -7352,18 +7303,24 @@ out:
}
if (sort_clone_roots) {
- for (i = 0; i < sctx->clone_roots_cnt; i++)
+ for (i = 0; i < sctx->clone_roots_cnt; i++) {
btrfs_root_dec_send_in_progress(
sctx->clone_roots[i].root);
+ btrfs_put_root(sctx->clone_roots[i].root);
+ }
} else {
- for (i = 0; sctx && i < clone_sources_to_rollback; i++)
+ for (i = 0; sctx && i < clone_sources_to_rollback; i++) {
btrfs_root_dec_send_in_progress(
sctx->clone_roots[i].root);
+ btrfs_put_root(sctx->clone_roots[i].root);
+ }
btrfs_root_dec_send_in_progress(send_root);
}
- if (sctx && !IS_ERR_OR_NULL(sctx->parent_root))
+ if (sctx && !IS_ERR_OR_NULL(sctx->parent_root)) {
btrfs_root_dec_send_in_progress(sctx->parent_root);
+ btrfs_put_root(sctx->parent_root);
+ }
kvfree(clone_sources_tmp);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.