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Diffstat (limited to 'fs/btrfs/send.c')
-rw-r--r--fs/btrfs/send.c94
1 files changed, 38 insertions, 56 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 8f1d3d6e7087..c10e4c70f02d 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -26,6 +26,7 @@
#include <linux/radix-tree.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
+#include <linux/compat.h>
#include "send.h"
#include "backref.h"
@@ -539,33 +540,23 @@ static struct btrfs_path *alloc_path_for_send(void)
static int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off)
{
int ret;
- mm_segment_t old_fs;
u32 pos = 0;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
-
while (pos < len) {
- ret = vfs_write(filp, (__force const char __user *)buf + pos,
- len - pos, off);
+ ret = kernel_write(filp, buf + pos, len - pos, off);
/* TODO handle that correctly */
/*if (ret == -ERESTARTSYS) {
continue;
}*/
if (ret < 0)
- goto out;
+ return ret;
if (ret == 0) {
- ret = -EIO;
- goto out;
+ return -EIO;
}
pos += ret;
}
- ret = 0;
-
-out:
- set_fs(old_fs);
- return ret;
+ return 0;
}
static int tlv_put(struct send_ctx *sctx, u16 attr, const void *data, int len)
@@ -1002,7 +993,6 @@ typedef int (*iterate_dir_item_t)(int num, struct btrfs_key *di_key,
* path must point to the dir item when called.
*/
static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
- struct btrfs_key *found_key,
iterate_dir_item_t iterate, void *ctx)
{
int ret = 0;
@@ -1281,12 +1271,6 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
*/
if (ino >= bctx->cur_objectid)
return 0;
-#if 0
- if (ino > bctx->cur_objectid)
- return 0;
- if (offset + bctx->extent_len > bctx->cur_offset)
- return 0;
-#endif
}
bctx->found++;
@@ -1439,7 +1423,7 @@ static int find_extent_clone(struct send_ctx *sctx,
extent_item_pos = 0;
ret = iterate_extent_inodes(fs_info, found_key.objectid,
extent_item_pos, 1, __iterate_backrefs,
- backref_ctx);
+ backref_ctx, false);
if (ret < 0)
goto out;
@@ -2640,7 +2624,7 @@ static int send_create_inode(struct send_ctx *sctx, u64 ino)
} else {
btrfs_warn(sctx->send_root->fs_info, "unexpected inode type %o",
(int)(mode & S_IFMT));
- ret = -ENOTSUPP;
+ ret = -EOPNOTSUPP;
goto out;
}
@@ -4116,8 +4100,8 @@ out:
return ret;
}
-static int record_ref(struct btrfs_root *root, int num, u64 dir, int index,
- struct fs_path *name, void *ctx, struct list_head *refs)
+static int record_ref(struct btrfs_root *root, u64 dir, struct fs_path *name,
+ void *ctx, struct list_head *refs)
{
int ret = 0;
struct send_ctx *sctx = ctx;
@@ -4153,8 +4137,7 @@ static int __record_new_ref(int num, u64 dir, int index,
void *ctx)
{
struct send_ctx *sctx = ctx;
- return record_ref(sctx->send_root, num, dir, index, name,
- ctx, &sctx->new_refs);
+ return record_ref(sctx->send_root, dir, name, ctx, &sctx->new_refs);
}
@@ -4163,8 +4146,8 @@ static int __record_deleted_ref(int num, u64 dir, int index,
void *ctx)
{
struct send_ctx *sctx = ctx;
- return record_ref(sctx->parent_root, num, dir, index, name,
- ctx, &sctx->deleted_refs);
+ return record_ref(sctx->parent_root, dir, name, ctx,
+ &sctx->deleted_refs);
}
static int record_new_ref(struct send_ctx *sctx)
@@ -4508,7 +4491,7 @@ static int process_new_xattr(struct send_ctx *sctx)
int ret = 0;
ret = iterate_dir_item(sctx->send_root, sctx->left_path,
- sctx->cmp_key, __process_new_xattr, sctx);
+ __process_new_xattr, sctx);
return ret;
}
@@ -4516,7 +4499,7 @@ static int process_new_xattr(struct send_ctx *sctx)
static int process_deleted_xattr(struct send_ctx *sctx)
{
return iterate_dir_item(sctx->parent_root, sctx->right_path,
- sctx->cmp_key, __process_deleted_xattr, sctx);
+ __process_deleted_xattr, sctx);
}
struct find_xattr_ctx {
@@ -4561,7 +4544,7 @@ static int find_xattr(struct btrfs_root *root,
ctx.found_data = NULL;
ctx.found_data_len = 0;
- ret = iterate_dir_item(root, path, key, __find_xattr, &ctx);
+ ret = iterate_dir_item(root, path, __find_xattr, &ctx);
if (ret < 0)
return ret;
@@ -4631,11 +4614,11 @@ static int process_changed_xattr(struct send_ctx *sctx)
int ret = 0;
ret = iterate_dir_item(sctx->send_root, sctx->left_path,
- sctx->cmp_key, __process_changed_new_xattr, sctx);
+ __process_changed_new_xattr, sctx);
if (ret < 0)
goto out;
ret = iterate_dir_item(sctx->parent_root, sctx->right_path,
- sctx->cmp_key, __process_changed_deleted_xattr, sctx);
+ __process_changed_deleted_xattr, sctx);
out:
return ret;
@@ -4685,8 +4668,7 @@ static int process_all_new_xattrs(struct send_ctx *sctx)
goto out;
}
- ret = iterate_dir_item(root, path, &found_key,
- __process_new_xattr, sctx);
+ ret = iterate_dir_item(root, path, __process_new_xattr, sctx);
if (ret < 0)
goto out;
@@ -4733,16 +4715,27 @@ static ssize_t fill_read_buf(struct send_ctx *sctx, u64 offset, u32 len)
/* initial readahead */
memset(&sctx->ra, 0, sizeof(struct file_ra_state));
file_ra_state_init(&sctx->ra, inode->i_mapping);
- page_cache_sync_readahead(inode->i_mapping, &sctx->ra, NULL, index,
- last_index - index + 1);
while (index <= last_index) {
unsigned cur_len = min_t(unsigned, len,
PAGE_SIZE - pg_offset);
- page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
+
+ page = find_lock_page(inode->i_mapping, index);
if (!page) {
- ret = -ENOMEM;
- break;
+ page_cache_sync_readahead(inode->i_mapping, &sctx->ra,
+ NULL, index, last_index + 1 - index);
+
+ page = find_or_create_page(inode->i_mapping, index,
+ GFP_KERNEL);
+ if (!page) {
+ ret = -ENOMEM;
+ break;
+ }
+ }
+
+ if (PageReadahead(page)) {
+ page_cache_async_readahead(inode->i_mapping, &sctx->ra,
+ NULL, page, index, last_index + 1 - index);
}
if (!PageUptodate(page)) {
@@ -6172,9 +6165,7 @@ out:
* Updates compare related fields in sctx and simply forwards to the actual
* changed_xxx functions.
*/
-static int changed_cb(struct btrfs_root *left_root,
- struct btrfs_root *right_root,
- struct btrfs_path *left_path,
+static int changed_cb(struct btrfs_path *left_path,
struct btrfs_path *right_path,
struct btrfs_key *key,
enum btrfs_compare_tree_result result,
@@ -6256,8 +6247,8 @@ static int full_send_tree(struct send_ctx *sctx)
slot = path->slots[0];
btrfs_item_key_to_cpu(eb, &found_key, slot);
- ret = changed_cb(send_root, NULL, path, NULL,
- &found_key, BTRFS_COMPARE_TREE_NEW, sctx);
+ ret = changed_cb(path, NULL, &found_key,
+ BTRFS_COMPARE_TREE_NEW, sctx);
if (ret < 0)
goto out;
@@ -6375,13 +6366,12 @@ static void btrfs_root_dec_send_in_progress(struct btrfs_root* root)
spin_unlock(&root->root_item_lock);
}
-long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
+long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
{
int ret = 0;
struct btrfs_root *send_root = BTRFS_I(file_inode(mnt_file))->root;
struct btrfs_fs_info *fs_info = send_root->fs_info;
struct btrfs_root *clone_root;
- struct btrfs_ioctl_send_args *arg = NULL;
struct btrfs_key key;
struct send_ctx *sctx = NULL;
u32 i;
@@ -6417,13 +6407,6 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
goto out;
}
- arg = memdup_user(arg_, sizeof(*arg));
- if (IS_ERR(arg)) {
- ret = PTR_ERR(arg);
- arg = NULL;
- goto out;
- }
-
/*
* Check that we don't overflow at later allocations, we request
* clone_sources_count + 1 items, and compare to unsigned long inside
@@ -6664,7 +6647,6 @@ out:
if (sctx && !IS_ERR_OR_NULL(sctx->parent_root))
btrfs_root_dec_send_in_progress(sctx->parent_root);
- kfree(arg);
kvfree(clone_sources_tmp);
if (sctx) {
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-29 17:25:55 +0300