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-rw-r--r--fs/btrfs/ioctl.c430
1 files changed, 160 insertions, 270 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 818f7ec8bb0e..de730e56d3f5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -45,6 +45,7 @@
#include "compression.h"
#include "space-info.h"
#include "delalloc-space.h"
+#include "block-group.h"
#ifdef CONFIG_64BIT
/* If we have a 32-bit userspace and 64-bit kernel, then the UAPI
@@ -1332,9 +1333,8 @@ again:
lock_extent_bits(&BTRFS_I(inode)->io_tree,
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,
- &cached_state);
+ page_end - 1, EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING |
+ EXTENT_DEFRAG, 0, 0, &cached_state);
if (i_done != page_cnt) {
spin_lock(&BTRFS_I(inode)->lock);
@@ -1840,8 +1840,15 @@ static noinline int btrfs_ioctl_snap_create_v2(struct file *file,
goto free_args;
}
- if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC)
+ if (vol_args->flags & BTRFS_SUBVOL_CREATE_ASYNC) {
+ struct inode *inode = file_inode(file);
+ struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
+
+ btrfs_warn(fs_info,
+"SNAP_CREATE_V2 ioctl with CREATE_ASYNC is deprecated and will be removed in kernel 5.7");
+
ptr = &transid;
+ }
if (vol_args->flags & BTRFS_SUBVOL_RDONLY)
readonly = true;
if (vol_args->flags & BTRFS_SUBVOL_QGROUP_INHERIT) {
@@ -3324,61 +3331,6 @@ out:
return ret;
}
-static void clone_update_extent_map(struct btrfs_inode *inode,
- const struct btrfs_trans_handle *trans,
- const struct btrfs_path *path,
- const u64 hole_offset,
- const u64 hole_len)
-{
- struct extent_map_tree *em_tree = &inode->extent_tree;
- struct extent_map *em;
- int ret;
-
- em = alloc_extent_map();
- if (!em) {
- set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags);
- return;
- }
-
- if (path) {
- struct btrfs_file_extent_item *fi;
-
- fi = btrfs_item_ptr(path->nodes[0], path->slots[0],
- struct btrfs_file_extent_item);
- btrfs_extent_item_to_extent_map(inode, path, fi, false, em);
- em->generation = -1;
- if (btrfs_file_extent_type(path->nodes[0], fi) ==
- BTRFS_FILE_EXTENT_INLINE)
- set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
- &inode->runtime_flags);
- } else {
- em->start = hole_offset;
- em->len = hole_len;
- em->ram_bytes = em->len;
- em->orig_start = hole_offset;
- em->block_start = EXTENT_MAP_HOLE;
- em->block_len = 0;
- em->orig_block_len = 0;
- em->compress_type = BTRFS_COMPRESS_NONE;
- em->generation = trans->transid;
- }
-
- while (1) {
- write_lock(&em_tree->lock);
- ret = add_extent_mapping(em_tree, em, 1);
- write_unlock(&em_tree->lock);
- if (ret != -EEXIST) {
- free_extent_map(em);
- break;
- }
- btrfs_drop_extent_cache(inode, em->start,
- em->start + em->len - 1, 0);
- }
-
- if (ret)
- set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags);
-}
-
/*
* Make sure we do not end up inserting an inline extent into a file that has
* already other (non-inline) extents. If a file has an inline extent it can
@@ -3519,6 +3471,7 @@ copy_inline_extent:
path->slots[0]),
size);
inode_add_bytes(dst, datal);
+ set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &BTRFS_I(dst)->runtime_flags);
return 0;
}
@@ -3570,6 +3523,14 @@ static int btrfs_clone(struct inode *src, struct inode *inode,
while (1) {
u64 next_key_min_offset = key.offset + 1;
+ struct btrfs_file_extent_item *extent;
+ int type;
+ u32 size;
+ struct btrfs_key new_key;
+ u64 disko = 0, diskl = 0;
+ u64 datao = 0, datal = 0;
+ u8 comp;
+ u64 drop_start;
/*
* note the key will change type as we walk through the
@@ -3610,75 +3571,115 @@ process_slot:
key.objectid != btrfs_ino(BTRFS_I(src)))
break;
- if (key.type == BTRFS_EXTENT_DATA_KEY) {
- struct btrfs_file_extent_item *extent;
- int type;
- u32 size;
- struct btrfs_key new_key;
- u64 disko = 0, diskl = 0;
- u64 datao = 0, datal = 0;
- u8 comp;
- u64 drop_start;
-
- extent = btrfs_item_ptr(leaf, slot,
- struct btrfs_file_extent_item);
- comp = btrfs_file_extent_compression(leaf, extent);
- type = btrfs_file_extent_type(leaf, extent);
- if (type == BTRFS_FILE_EXTENT_REG ||
- type == BTRFS_FILE_EXTENT_PREALLOC) {
- disko = btrfs_file_extent_disk_bytenr(leaf,
- extent);
- diskl = btrfs_file_extent_disk_num_bytes(leaf,
- extent);
- datao = btrfs_file_extent_offset(leaf, extent);
- datal = btrfs_file_extent_num_bytes(leaf,
- extent);
- } else if (type == BTRFS_FILE_EXTENT_INLINE) {
- /* take upper bound, may be compressed */
- datal = btrfs_file_extent_ram_bytes(leaf,
- extent);
- }
+ ASSERT(key.type == BTRFS_EXTENT_DATA_KEY);
+
+ extent = btrfs_item_ptr(leaf, slot,
+ struct btrfs_file_extent_item);
+ comp = btrfs_file_extent_compression(leaf, extent);
+ type = btrfs_file_extent_type(leaf, extent);
+ if (type == BTRFS_FILE_EXTENT_REG ||
+ type == BTRFS_FILE_EXTENT_PREALLOC) {
+ disko = btrfs_file_extent_disk_bytenr(leaf, extent);
+ diskl = btrfs_file_extent_disk_num_bytes(leaf, extent);
+ datao = btrfs_file_extent_offset(leaf, extent);
+ datal = btrfs_file_extent_num_bytes(leaf, extent);
+ } else if (type == BTRFS_FILE_EXTENT_INLINE) {
+ /* Take upper bound, may be compressed */
+ datal = btrfs_file_extent_ram_bytes(leaf, extent);
+ }
+
+ /*
+ * The first search might have left us at an extent item that
+ * ends before our target range's start, can happen if we have
+ * holes and NO_HOLES feature enabled.
+ */
+ if (key.offset + datal <= off) {
+ path->slots[0]++;
+ goto process_slot;
+ } else if (key.offset >= off + len) {
+ break;
+ }
+ next_key_min_offset = key.offset + datal;
+ size = btrfs_item_size_nr(leaf, slot);
+ read_extent_buffer(leaf, buf, btrfs_item_ptr_offset(leaf, slot),
+ size);
+
+ btrfs_release_path(path);
+ path->leave_spinning = 0;
+
+ memcpy(&new_key, &key, sizeof(new_key));
+ new_key.objectid = btrfs_ino(BTRFS_I(inode));
+ if (off <= key.offset)
+ new_key.offset = key.offset + destoff - off;
+ else
+ new_key.offset = destoff;
+
+ /*
+ * Deal with a hole that doesn't have an extent item that
+ * represents it (NO_HOLES feature enabled).
+ * This hole is either in the middle of the cloning range or at
+ * the beginning (fully overlaps it or partially overlaps it).
+ */
+ if (new_key.offset != last_dest_end)
+ drop_start = last_dest_end;
+ else
+ drop_start = new_key.offset;
+
+ if (type == BTRFS_FILE_EXTENT_REG ||
+ type == BTRFS_FILE_EXTENT_PREALLOC) {
+ struct btrfs_clone_extent_info clone_info;
/*
- * The first search might have left us at an extent
- * item that ends before our target range's start, can
- * happen if we have holes and NO_HOLES feature enabled.
+ * a | --- range to clone ---| b
+ * | ------------- extent ------------- |
*/
- if (key.offset + datal <= off) {
- path->slots[0]++;
- goto process_slot;
- } else if (key.offset >= off + len) {
- break;
+
+ /* Subtract range b */
+ if (key.offset + datal > off + len)
+ datal = off + len - key.offset;
+
+ /* Subtract range a */
+ if (off > key.offset) {
+ datao += off - key.offset;
+ datal -= off - key.offset;
}
- next_key_min_offset = key.offset + datal;
- size = btrfs_item_size_nr(leaf, slot);
- read_extent_buffer(leaf, buf,
- btrfs_item_ptr_offset(leaf, slot),
- size);
- btrfs_release_path(path);
- path->leave_spinning = 0;
+ clone_info.disk_offset = disko;
+ clone_info.disk_len = diskl;
+ clone_info.data_offset = datao;
+ clone_info.data_len = datal;
+ clone_info.file_offset = new_key.offset;
+ clone_info.extent_buf = buf;
+ clone_info.item_size = size;
+ ret = btrfs_punch_hole_range(inode, path,
+ drop_start,
+ new_key.offset + datal - 1,
+ &clone_info, &trans);
+ if (ret)
+ goto out;
+ } else if (type == BTRFS_FILE_EXTENT_INLINE) {
+ u64 skip = 0;
+ u64 trim = 0;
- memcpy(&new_key, &key, sizeof(new_key));
- new_key.objectid = btrfs_ino(BTRFS_I(inode));
- if (off <= key.offset)
- new_key.offset = key.offset + destoff - off;
- else
- new_key.offset = destoff;
+ if (off > key.offset) {
+ skip = off - key.offset;
+ new_key.offset += skip;
+ }
- /*
- * Deal with a hole that doesn't have an extent item
- * that represents it (NO_HOLES feature enabled).
- * This hole is either in the middle of the cloning
- * range or at the beginning (fully overlaps it or
- * partially overlaps it).
- */
- if (new_key.offset != last_dest_end)
- drop_start = last_dest_end;
- else
- drop_start = new_key.offset;
+ if (key.offset + datal > off + len)
+ trim = key.offset + datal - (off + len);
+
+ if (comp && (skip || trim)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ size -= skip + trim;
+ datal -= skip + trim;
/*
+ * If our extent is inline, we know we will drop or
+ * adjust at most 1 extent item in the destination root.
+ *
* 1 - adjusting old extent (we may have to split it)
* 1 - add new extent
* 1 - inode update
@@ -3689,140 +3690,28 @@ process_slot:
goto out;
}
- if (type == BTRFS_FILE_EXTENT_REG ||
- type == BTRFS_FILE_EXTENT_PREALLOC) {
- /*
- * a | --- range to clone ---| b
- * | ------------- extent ------------- |
- */
-
- /* subtract range b */
- if (key.offset + datal > off + len)
- datal = off + len - key.offset;
-
- /* subtract range a */
- if (off > key.offset) {
- datao += off - key.offset;
- datal -= off - key.offset;
- }
-
- ret = btrfs_drop_extents(trans, root, inode,
- drop_start,
- new_key.offset + datal,
- 1);
- if (ret) {
- if (ret != -EOPNOTSUPP)
- btrfs_abort_transaction(trans,
- ret);
- btrfs_end_transaction(trans);
- goto out;
- }
-
- ret = btrfs_insert_empty_item(trans, root, path,
- &new_key, size);
- if (ret) {
+ ret = clone_copy_inline_extent(inode, trans, path,
+ &new_key, drop_start,
+ datal, skip, size, buf);
+ if (ret) {
+ if (ret != -EOPNOTSUPP)
btrfs_abort_transaction(trans, ret);
- btrfs_end_transaction(trans);
- goto out;
- }
-
- leaf = path->nodes[0];
- slot = path->slots[0];
- write_extent_buffer(leaf, buf,
- btrfs_item_ptr_offset(leaf, slot),
- size);
-
- extent = btrfs_item_ptr(leaf, slot,
- struct btrfs_file_extent_item);
-
- /* disko == 0 means it's a hole */
- if (!disko)
- datao = 0;
-
- btrfs_set_file_extent_offset(leaf, extent,
- datao);
- btrfs_set_file_extent_num_bytes(leaf, extent,
- datal);
-
- if (disko) {
- struct btrfs_ref ref = { 0 };
- inode_add_bytes(inode, datal);
- btrfs_init_generic_ref(&ref,
- BTRFS_ADD_DELAYED_REF, disko,
- diskl, 0);
- btrfs_init_data_ref(&ref,
- root->root_key.objectid,
- btrfs_ino(BTRFS_I(inode)),
- new_key.offset - datao);
- ret = btrfs_inc_extent_ref(trans, &ref);
- if (ret) {
- btrfs_abort_transaction(trans,
- ret);
- btrfs_end_transaction(trans);
- goto out;
-
- }
- }
- } else if (type == BTRFS_FILE_EXTENT_INLINE) {
- u64 skip = 0;
- u64 trim = 0;
-
- if (off > key.offset) {
- skip = off - key.offset;
- new_key.offset += skip;
- }
-
- if (key.offset + datal > off + len)
- trim = key.offset + datal - (off + len);
-
- if (comp && (skip || trim)) {
- ret = -EINVAL;
- btrfs_end_transaction(trans);
- goto out;
- }
- size -= skip + trim;
- datal -= skip + trim;
-
- ret = clone_copy_inline_extent(inode,
- trans, path,
- &new_key,
- drop_start,
- datal,
- skip, size, buf);
- if (ret) {
- if (ret != -EOPNOTSUPP)
- btrfs_abort_transaction(trans,
- ret);
- btrfs_end_transaction(trans);
- goto out;
- }
- leaf = path->nodes[0];
- slot = path->slots[0];
+ btrfs_end_transaction(trans);
+ goto out;
}
+ }
- /* If we have an implicit hole (NO_HOLES feature). */
- if (drop_start < new_key.offset)
- clone_update_extent_map(BTRFS_I(inode), trans,
- NULL, drop_start,
- new_key.offset - drop_start);
-
- clone_update_extent_map(BTRFS_I(inode), trans,
- path, 0, 0);
+ btrfs_release_path(path);
- btrfs_mark_buffer_dirty(leaf);
- btrfs_release_path(path);
+ last_dest_end = ALIGN(new_key.offset + datal,
+ fs_info->sectorsize);
+ ret = clone_finish_inode_update(trans, inode, last_dest_end,
+ destoff, olen, no_time_update);
+ if (ret)
+ goto out;
+ if (new_key.offset + datal >= destoff + len)
+ break;
- last_dest_end = ALIGN(new_key.offset + datal,
- fs_info->sectorsize);
- ret = clone_finish_inode_update(trans, inode,
- last_dest_end,
- destoff, olen,
- no_time_update);
- if (ret)
- goto out;
- if (new_key.offset + datal >= destoff + len)
- break;
- }
btrfs_release_path(path);
key.offset = next_key_min_offset;
@@ -3834,32 +3723,27 @@ process_slot:
ret = 0;
if (last_dest_end < destoff + len) {
+ struct btrfs_clone_extent_info clone_info = { 0 };
/*
* We have an implicit hole (NO_HOLES feature is enabled) that
* fully or partially overlaps our cloning range at its end.
*/
btrfs_release_path(path);
+ path->leave_spinning = 0;
/*
- * 1 - remove extent(s)
- * 1 - inode update
+ * We are dealing with a hole and our clone_info already has a
+ * disk_offset of 0, we only need to fill the data length and
+ * file offset.
*/
- trans = btrfs_start_transaction(root, 2);
- if (IS_ERR(trans)) {
- ret = PTR_ERR(trans);
- goto out;
- }
- ret = btrfs_drop_extents(trans, root, inode,
- last_dest_end, destoff + len, 1);
- if (ret) {
- if (ret != -EOPNOTSUPP)
- btrfs_abort_transaction(trans, ret);
- btrfs_end_transaction(trans);
+ clone_info.data_len = destoff + len - last_dest_end;
+ clone_info.file_offset = last_dest_end;
+ ret = btrfs_punch_hole_range(inode, path,
+ last_dest_end, destoff + len - 1,
+ &clone_info, &trans);
+ if (ret)
goto out;
- }
- clone_update_extent_map(BTRFS_I(inode), trans, NULL,
- last_dest_end,
- destoff + len - last_dest_end);
+
ret = clone_finish_inode_update(trans, inode, destoff + len,
destoff, olen, no_time_update);
}
@@ -4313,6 +4197,9 @@ static noinline long btrfs_ioctl_start_sync(struct btrfs_root *root,
u64 transid;
int ret;
+ btrfs_warn(root->fs_info,
+ "START_SYNC ioctl is deprecated and will be removed in kernel 5.7");
+
trans = btrfs_attach_transaction_barrier(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT)
@@ -4340,6 +4227,9 @@ static noinline long btrfs_ioctl_wait_sync(struct btrfs_fs_info *fs_info,
{
u64 transid;
+ btrfs_warn(fs_info,
+ "WAIT_SYNC ioctl is deprecated and will be removed in kernel 5.7");
+
if (argp) {
if (copy_from_user(&transid, argp, sizeof(transid)))
return -EFAULT;
@@ -5381,7 +5271,7 @@ static int check_feature_bits(struct btrfs_fs_info *fs_info,
u64 change_mask, u64 flags, u64 supported_flags,
u64 safe_set, u64 safe_clear)
{
- const char *type = btrfs_feature_set_names[set];
+ const char *type = btrfs_feature_set_name(set);
char *names;
u64 disallowed, unsupported;
u64 set_mask = flags & change_mask;
@@ -5562,6 +5452,10 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_setflags(file, argp);
case FS_IOC_GETVERSION:
return btrfs_ioctl_getversion(file, argp);
+ case FS_IOC_GETFSLABEL:
+ return btrfs_ioctl_get_fslabel(file, argp);
+ case FS_IOC_SETFSLABEL:
+ return btrfs_ioctl_set_fslabel(file, argp);
case FITRIM:
return btrfs_ioctl_fitrim(file, argp);
case BTRFS_IOC_SNAP_CREATE:
@@ -5673,10 +5567,6 @@ long btrfs_ioctl(struct file *file, unsigned int
return btrfs_ioctl_quota_rescan_wait(file, argp);
case BTRFS_IOC_DEV_REPLACE:
return btrfs_ioctl_dev_replace(fs_info, argp);
- case BTRFS_IOC_GET_FSLABEL:
- return btrfs_ioctl_get_fslabel(file, argp);
- case BTRFS_IOC_SET_FSLABEL:
- return btrfs_ioctl_set_fslabel(file, argp);
case BTRFS_IOC_GET_SUPPORTED_FEATURES:
return btrfs_ioctl_get_supported_features(argp);
case BTRFS_IOC_GET_FEATURES: