btrfs: send: use GFP_KERNEL everywhere

The send operation is not on the critical writeback path we don't need
to use GFP_NOFS for allocations. All error paths are handled and the
whole operation is restartable.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 769e0ff..00741eb 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -5361,7 +5361,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
                goto out;
        }
 
-       tmp_buf = kmalloc(left_root->nodesize, GFP_NOFS);
+       tmp_buf = kmalloc(left_root->nodesize, GFP_KERNEL);
        if (!tmp_buf) {
                ret = -ENOMEM;
                goto out;

diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 63a6152..d2e2992 100644 (file)
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -304,7 +304,7 @@ static struct fs_path *fs_path_alloc(void)
 {
        struct fs_path *p;
 
-       p = kmalloc(sizeof(*p), GFP_NOFS);
+       p = kmalloc(sizeof(*p), GFP_KERNEL);
        if (!p)
                return NULL;
        p->reversed = 0;
@@ -363,11 +363,11 @@ static int fs_path_ensure_buf(struct fs_path *p, int len)
         * First time the inline_buf does not suffice
         */
        if (p->buf == p->inline_buf) {
-               tmp_buf = kmalloc(len, GFP_NOFS);
+               tmp_buf = kmalloc(len, GFP_KERNEL);
                if (tmp_buf)
                        memcpy(tmp_buf, p->buf, old_buf_len);
        } else {
-               tmp_buf = krealloc(p->buf, len, GFP_NOFS);
+               tmp_buf = krealloc(p->buf, len, GFP_KERNEL);
        }
        if (!tmp_buf)
                return -ENOMEM;
@@ -995,7 +995,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
         * values are small.
         */
        buf_len = PATH_MAX;
-       buf = kmalloc(buf_len, GFP_NOFS);
+       buf = kmalloc(buf_len, GFP_KERNEL);
        if (!buf) {
                ret = -ENOMEM;
                goto out;
@@ -1042,7 +1042,7 @@ static int iterate_dir_item(struct btrfs_root *root, struct btrfs_path *path,
                                buf = NULL;
                        } else {
                                char *tmp = krealloc(buf, buf_len,
-                                                    GFP_NOFS | __GFP_NOWARN);
+                                               GFP_KERNEL | __GFP_NOWARN);
 
                                if (!tmp)
                                        kfree(buf);
@@ -1303,7 +1303,7 @@ static int find_extent_clone(struct send_ctx *sctx,
        /* We only use this path under the commit sem */
        tmp_path->need_commit_sem = 0;
 
-       backref_ctx = kmalloc(sizeof(*backref_ctx), GFP_NOFS);
+       backref_ctx = kmalloc(sizeof(*backref_ctx), GFP_KERNEL);
        if (!backref_ctx) {
                ret = -ENOMEM;
                goto out;
@@ -1984,7 +1984,7 @@ static int name_cache_insert(struct send_ctx *sctx,
        nce_head = radix_tree_lookup(&sctx->name_cache,
                        (unsigned long)nce->ino);
        if (!nce_head) {
-               nce_head = kmalloc(sizeof(*nce_head), GFP_NOFS);
+               nce_head = kmalloc(sizeof(*nce_head), GFP_KERNEL);
                if (!nce_head) {
                        kfree(nce);
                        return -ENOMEM;
@@ -2179,7 +2179,7 @@ out_cache:
        /*
         * Store the result of the lookup in the name cache.
         */
-       nce = kmalloc(sizeof(*nce) + fs_path_len(dest) + 1, GFP_NOFS);
+       nce = kmalloc(sizeof(*nce) + fs_path_len(dest) + 1, GFP_KERNEL);
        if (!nce) {
                ret = -ENOMEM;
                goto out;
@@ -2315,7 +2315,7 @@ static int send_subvol_begin(struct send_ctx *sctx)
        if (!path)
                return -ENOMEM;
 
-       name = kmalloc(BTRFS_PATH_NAME_MAX, GFP_NOFS);
+       name = kmalloc(BTRFS_PATH_NAME_MAX, GFP_KERNEL);
        if (!name) {
                btrfs_free_path(path);
                return -ENOMEM;
@@ -2730,7 +2730,7 @@ static int __record_ref(struct list_head *head, u64 dir,
 {
        struct recorded_ref *ref;
 
-       ref = kmalloc(sizeof(*ref), GFP_NOFS);
+       ref = kmalloc(sizeof(*ref), GFP_KERNEL);
        if (!ref)
                return -ENOMEM;
 
@@ -2755,7 +2755,7 @@ static int dup_ref(struct recorded_ref *ref, struct list_head *list)
 {
        struct recorded_ref *new;
 
-       new = kmalloc(sizeof(*ref), GFP_NOFS);
+       new = kmalloc(sizeof(*ref), GFP_KERNEL);
        if (!new)
                return -ENOMEM;
 
@@ -2818,7 +2818,7 @@ add_orphan_dir_info(struct send_ctx *sctx, u64 dir_ino)
        struct rb_node *parent = NULL;
        struct orphan_dir_info *entry, *odi;
 
-       odi = kmalloc(sizeof(*odi), GFP_NOFS);
+       odi = kmalloc(sizeof(*odi), GFP_KERNEL);
        if (!odi)
                return ERR_PTR(-ENOMEM);
        odi->ino = dir_ino;
@@ -2973,7 +2973,7 @@ static int add_waiting_dir_move(struct send_ctx *sctx, u64 ino, bool orphanized)
        struct rb_node *parent = NULL;
        struct waiting_dir_move *entry, *dm;
 
-       dm = kmalloc(sizeof(*dm), GFP_NOFS);
+       dm = kmalloc(sizeof(*dm), GFP_KERNEL);
        if (!dm)
                return -ENOMEM;
        dm->ino = ino;
@@ -3040,7 +3040,7 @@ static int add_pending_dir_move(struct send_ctx *sctx,
        int exists = 0;
        int ret;
 
-       pm = kmalloc(sizeof(*pm), GFP_NOFS);
+       pm = kmalloc(sizeof(*pm), GFP_KERNEL);
        if (!pm)
                return -ENOMEM;
        pm->parent_ino = parent_ino;
@@ -4280,7 +4280,7 @@ static int __find_xattr(int num, struct btrfs_key *di_key,
            strncmp(name, ctx->name, name_len) == 0) {
                ctx->found_idx = num;
                ctx->found_data_len = data_len;
-               ctx->found_data = kmemdup(data, data_len, GFP_NOFS);
+               ctx->found_data = kmemdup(data, data_len, GFP_KERNEL);
                if (!ctx->found_data)
                        return -ENOMEM;
                return 1;
@@ -4481,7 +4481,7 @@ static ssize_t fill_read_buf(struct send_ctx *sctx, u64 offset, u32 len)
        while (index <= last_index) {
                unsigned cur_len = min_t(unsigned, len,
                                         PAGE_CACHE_SIZE - pg_offset);
-               page = find_or_create_page(inode->i_mapping, index, GFP_NOFS);
+               page = find_or_create_page(inode->i_mapping, index, GFP_KERNEL);
                if (!page) {
                        ret = -ENOMEM;
                        break;
@@ -5989,7 +5989,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
                goto out;
        }
 
-       sctx = kzalloc(sizeof(struct send_ctx), GFP_NOFS);
+       sctx = kzalloc(sizeof(struct send_ctx), GFP_KERNEL);
        if (!sctx) {
                ret = -ENOMEM;
                goto out;
@@ -5997,7 +5997,7 @@ long btrfs_ioctl_send(struct file *mnt_file, void __user *arg_)
 
        INIT_LIST_HEAD(&sctx->new_refs);
        INIT_LIST_HEAD(&sctx->deleted_refs);
-       INIT_RADIX_TREE(&sctx->name_cache, GFP_NOFS);
+       INIT_RADIX_TREE(&sctx->name_cache, GFP_KERNEL);
        INIT_LIST_HEAD(&sctx->name_cache_list);
 
        sctx->flags = arg->flags;