summaryrefslogtreecommitdiffstats
path: root/fs/btrfs
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs')
-rw-r--r--fs/btrfs/acl.c64
-rw-r--r--fs/btrfs/ctree.h11
-rw-r--r--fs/btrfs/delayed-inode.h2
-rw-r--r--fs/btrfs/disk-io.c15
-rw-r--r--fs/btrfs/extent_io.c2
-rw-r--r--fs/btrfs/file.c169
-rw-r--r--fs/btrfs/inode.c29
-rw-r--r--fs/btrfs/ioctl.c16
8 files changed, 205 insertions, 103 deletions
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index f66fc995973..65a735d8f6e 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -30,7 +30,7 @@
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
-static struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
+struct posix_acl *btrfs_get_acl(struct inode *inode, int type)
{
int size;
const char *name;
@@ -195,28 +195,6 @@ out:
return ret;
}
-int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags)
-{
- int error = -EAGAIN;
-
- if (flags & IPERM_FLAG_RCU) {
- if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
- error = -ECHILD;
-
- } else {
- struct posix_acl *acl;
- acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);
- if (IS_ERR(acl))
- return PTR_ERR(acl);
- if (acl) {
- error = posix_acl_permission(inode, acl, mask);
- posix_acl_release(acl);
- }
- }
-
- return error;
-}
-
/*
* btrfs_init_acl is already generally called under fs_mutex, so the locking
* stuff has been fixed to work with that. If the locking stuff changes, we
@@ -244,8 +222,7 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
}
if (IS_POSIXACL(dir) && acl) {
- struct posix_acl *clone;
- mode_t mode;
+ mode_t mode = inode->i_mode;
if (S_ISDIR(inode->i_mode)) {
ret = btrfs_set_acl(trans, inode, acl,
@@ -253,22 +230,15 @@ int btrfs_init_acl(struct btrfs_trans_handle *trans,
if (ret)
goto failed;
}
- clone = posix_acl_clone(acl, GFP_NOFS);
- ret = -ENOMEM;
- if (!clone)
- goto failed;
+ ret = posix_acl_create(&acl, GFP_NOFS, &mode);
+ if (ret < 0)
+ return ret;
- mode = inode->i_mode;
- ret = posix_acl_create_masq(clone, &mode);
- if (ret >= 0) {
- inode->i_mode = mode;
- if (ret > 0) {
- /* we need an acl */
- ret = btrfs_set_acl(trans, inode, clone,
- ACL_TYPE_ACCESS);
- }
+ inode->i_mode = mode;
+ if (ret > 0) {
+ /* we need an acl */
+ ret = btrfs_set_acl(trans, inode, acl, ACL_TYPE_ACCESS);
}
- posix_acl_release(clone);
}
failed:
posix_acl_release(acl);
@@ -278,7 +248,7 @@ failed:
int btrfs_acl_chmod(struct inode *inode)
{
- struct posix_acl *acl, *clone;
+ struct posix_acl *acl;
int ret = 0;
if (S_ISLNK(inode->i_mode))
@@ -291,17 +261,11 @@ int btrfs_acl_chmod(struct inode *inode)
if (IS_ERR_OR_NULL(acl))
return PTR_ERR(acl);
- clone = posix_acl_clone(acl, GFP_KERNEL);
+ ret = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode);
+ if (ret)
+ return ret;
+ ret = btrfs_set_acl(NULL, inode, acl, ACL_TYPE_ACCESS);
posix_acl_release(acl);
- if (!clone)
- return -ENOMEM;
-
- ret = posix_acl_chmod_masq(clone, inode->i_mode);
- if (!ret)
- ret = btrfs_set_acl(NULL, inode, clone, ACL_TYPE_ACCESS);
-
- posix_acl_release(clone);
-
return ret;
}
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 3be57c61104..365c4e1dde0 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1224,7 +1224,7 @@ struct btrfs_root {
* right now this just gets used so that a root has its own devid
* for stat. It may be used for more later
*/
- struct super_block anon_super;
+ dev_t anon_dev;
};
struct btrfs_ioctl_defrag_range_args {
@@ -2512,6 +2512,9 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end,
struct list_head *list, int search_commit);
/* inode.c */
+struct extent_map *btrfs_get_extent_fiemap(struct inode *inode, struct page *page,
+ size_t pg_offset, u64 start, u64 len,
+ int create);
/* RHEL and EL kernels have a patch that renames PG_checked to FsMisc */
#if defined(ClearPageFsMisc) && !defined(ClearPageChecked)
@@ -2604,7 +2607,7 @@ int btrfs_defrag_file(struct inode *inode, struct file *file,
int btrfs_add_inode_defrag(struct btrfs_trans_handle *trans,
struct inode *inode);
int btrfs_run_defrag_inodes(struct btrfs_fs_info *fs_info);
-int btrfs_sync_file(struct file *file, int datasync);
+int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
int skip_pinned);
extern const struct file_operations btrfs_file_operations;
@@ -2644,9 +2647,9 @@ do { \
/* acl.c */
#ifdef CONFIG_BTRFS_FS_POSIX_ACL
-int btrfs_check_acl(struct inode *inode, int mask, unsigned int flags);
+struct posix_acl *btrfs_get_acl(struct inode *inode, int type);
#else
-#define btrfs_check_acl NULL
+#define btrfs_get_acl NULL
#endif
int btrfs_init_acl(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *dir);
diff --git a/fs/btrfs/delayed-inode.h b/fs/btrfs/delayed-inode.h
index 8d27af4bd8b..7083d08b2a2 100644
--- a/fs/btrfs/delayed-inode.h
+++ b/fs/btrfs/delayed-inode.h
@@ -25,7 +25,7 @@
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/wait.h>
-#include <asm/atomic.h>
+#include <linux/atomic.h>
#include "ctree.h"
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 94ecac33cf2..07b3ac662e1 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1111,12 +1111,7 @@ static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
init_completion(&root->kobj_unregister);
root->defrag_running = 0;
root->root_key.objectid = objectid;
- root->anon_super.s_root = NULL;
- root->anon_super.s_dev = 0;
- INIT_LIST_HEAD(&root->anon_super.s_list);
- INIT_LIST_HEAD(&root->anon_super.s_instances);
- init_rwsem(&root->anon_super.s_umount);
-
+ root->anon_dev = 0;
return 0;
}
@@ -1345,7 +1340,7 @@ again:
spin_lock_init(&root->cache_lock);
init_waitqueue_head(&root->cache_wait);
- ret = set_anon_super(&root->anon_super, NULL);
+ ret = get_anon_bdev(&root->anon_dev);
if (ret)
goto fail;
@@ -2432,10 +2427,8 @@ static void free_fs_root(struct btrfs_root *root)
{
iput(root->cache_inode);
WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
- if (root->anon_super.s_dev) {
- down_write(&root->anon_super.s_umount);
- kill_anon_super(&root->anon_super);
- }
+ if (root->anon_dev)
+ free_anon_bdev(root->anon_dev);
free_extent_buffer(root->node);
free_extent_buffer(root->commit_root);
kfree(root->free_ino_ctl);
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 5bbdb243bb6..067b1747421 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2556,7 +2556,6 @@ int extent_write_full_page(struct extent_io_tree *tree, struct page *page,
};
struct writeback_control wbc_writepages = {
.sync_mode = wbc->sync_mode,
- .older_than_this = NULL,
.nr_to_write = 64,
.range_start = page_offset(page) + PAGE_CACHE_SIZE,
.range_end = (loff_t)-1,
@@ -2589,7 +2588,6 @@ int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode,
};
struct writeback_control wbc_writepages = {
.sync_mode = mode,
- .older_than_this = NULL,
.nr_to_write = nr_pages * 2,
.range_start = start,
.range_end = end + 1,
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 6e56a468d1f..a35e51c9f23 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1455,7 +1455,7 @@ int btrfs_release_file(struct inode *inode, struct file *filp)
* important optimization for directories because holding the mutex prevents
* new operations on the dir while we write to disk.
*/
-int btrfs_sync_file(struct file *file, int datasync)
+int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
{
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
@@ -1465,9 +1465,13 @@ int btrfs_sync_file(struct file *file, int datasync)
trace_btrfs_sync_file(file, datasync);
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (ret)
+ return ret;
+ mutex_lock(&inode->i_mutex);
+
/* we wait first, since the writeback may change the inode */
root->log_batch++;
- /* the VFS called filemap_fdatawrite for us */
btrfs_wait_ordered_range(inode, 0, (u64)-1);
root->log_batch++;
@@ -1475,8 +1479,10 @@ int btrfs_sync_file(struct file *file, int datasync)
* check the transaction that last modified this inode
* and see if its already been committed
*/
- if (!BTRFS_I(inode)->last_trans)
+ if (!BTRFS_I(inode)->last_trans) {
+ mutex_unlock(&inode->i_mutex);
goto out;
+ }
/*
* if the last transaction that changed this file was before
@@ -1487,6 +1493,7 @@ int btrfs_sync_file(struct file *file, int datasync)
if (BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) {
BTRFS_I(inode)->last_trans = 0;
+ mutex_unlock(&inode->i_mutex);
goto out;
}
@@ -1499,12 +1506,15 @@ int btrfs_sync_file(struct file *file, int datasync)
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
+ mutex_unlock(&inode->i_mutex);
goto out;
}
ret = btrfs_log_dentry_safe(trans, root, dentry);
- if (ret < 0)
+ if (ret < 0) {
+ mutex_unlock(&inode->i_mutex);
goto out;
+ }
/* we've logged all the items and now have a consistent
* version of the file in the log. It is possible that
@@ -1516,7 +1526,7 @@ int btrfs_sync_file(struct file *file, int datasync)
* file again, but that will end up using the synchronization
* inside btrfs_sync_log to keep things safe.
*/
- mutex_unlock(&dentry->d_inode->i_mutex);
+ mutex_unlock(&inode->i_mutex);
if (ret != BTRFS_NO_LOG_SYNC) {
if (ret > 0) {
@@ -1531,7 +1541,6 @@ int btrfs_sync_file(struct file *file, int datasync)
} else {
ret = btrfs_end_transaction(trans, root);
}
- mutex_lock(&dentry->d_inode->i_mutex);
out:
return ret > 0 ? -EIO : ret;
}
@@ -1667,8 +1676,154 @@ out:
return ret;
}
+static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
+{
+ struct btrfs_root *root = BTRFS_I(inode)->root;
+ struct extent_map *em;
+ struct extent_state *cached_state = NULL;
+ u64 lockstart = *offset;
+ u64 lockend = i_size_read(inode);
+ u64 start = *offset;
+ u64 orig_start = *offset;
+ u64 len = i_size_read(inode);
+ u64 last_end = 0;
+ int ret = 0;
+
+ lockend = max_t(u64, root->sectorsize, lockend);
+ if (lockend <= lockstart)
+ lockend = lockstart + root->sectorsize;
+
+ len = lockend - lockstart + 1;
+
+ len = max_t(u64, len, root->sectorsize);
+ if (inode->i_size == 0)
+ return -ENXIO;
+
+ lock_extent_bits(&BTRFS_I(inode)->io_tree, lockstart, lockend, 0,
+ &cached_state, GFP_NOFS);
+
+ /*
+ * Delalloc is such a pain. If we have a hole and we have pending
+ * delalloc for a portion of the hole we will get back a hole that
+ * exists for the entire range since it hasn't been actually written
+ * yet. So to take care of this case we need to look for an extent just
+ * before the position we want in case there is outstanding delalloc
+ * going on here.
+ */
+ if (origin == SEEK_HOLE && start != 0) {
+ if (start <= root->sectorsize)
+ em = btrfs_get_extent_fiemap(inode, NULL, 0, 0,
+ root->sectorsize, 0);
+ else
+ em = btrfs_get_extent_fiemap(inode, NULL, 0,
+ start - root->sectorsize,
+ root->sectorsize, 0);
+ if (IS_ERR(em)) {
+ ret = -ENXIO;
+ goto out;
+ }
+ last_end = em->start + em->len;
+ if (em->block_start == EXTENT_MAP_DELALLOC)
+ last_end = min_t(u64, last_end, inode->i_size);
+ free_extent_map(em);
+ }
+
+ while (1) {
+ em = btrfs_get_extent_fiemap(inode, NULL, 0, start, len, 0);
+ if (IS_ERR(em)) {
+ ret = -ENXIO;
+ break;
+ }
+
+ if (em->block_start == EXTENT_MAP_HOLE) {
+ if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
+ if (last_end <= orig_start) {
+ free_extent_map(em);
+ ret = -ENXIO;
+ break;
+ }
+ }
+
+ if (origin == SEEK_HOLE) {
+ *offset = start;
+ free_extent_map(em);
+ break;
+ }
+ } else {
+ if (origin == SEEK_DATA) {
+ if (em->block_start == EXTENT_MAP_DELALLOC) {
+ if (start >= inode->i_size) {
+ free_extent_map(em);
+ ret = -ENXIO;
+ break;
+ }
+ }
+
+ *offset = start;
+ free_extent_map(em);
+ break;
+ }
+ }
+
+ start = em->start + em->len;
+ last_end = em->start + em->len;
+
+ if (em->block_start == EXTENT_MAP_DELALLOC)
+ last_end = min_t(u64, last_end, inode->i_size);
+
+ if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
+ free_extent_map(em);
+ ret = -ENXIO;
+ break;
+ }
+ free_extent_map(em);
+ cond_resched();
+ }
+ if (!ret)
+ *offset = min(*offset, inode->i_size);
+out:
+ unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
+ &cached_state, GFP_NOFS);
+ return ret;
+}
+
+static loff_t btrfs_file_llseek(struct file *file, loff_t offset, int origin)
+{
+ struct inode *inode = file->f_mapping->host;
+ int ret;
+
+ mutex_lock(&inode->i_mutex);
+ switch (origin) {
+ case SEEK_END:
+ case SEEK_CUR:
+ offset = generic_file_llseek_unlocked(file, offset, origin);
+ goto out;
+ case SEEK_DATA:
+ case SEEK_HOLE:
+ ret = find_desired_extent(inode, &offset, origin);
+ if (ret) {
+ mutex_unlock(&inode->i_mutex);
+ return ret;
+ }
+ }
+
+ if (offset < 0 && !(file->f_mode & FMODE_UNSIGNED_OFFSET))
+ return -EINVAL;
+ if (offset > inode->i_sb->s_maxbytes)
+ return -EINVAL;
+
+ /* Special lock needed here? */
+ if (offset != file->f_pos) {
+ file->f_pos = offset;
+ file->f_version = 0;
+ }
+out:
+ mutex_unlock(&inode->i_mutex);
+ return offset;
+}
+
const struct file_operations btrfs_file_operations = {
- .llseek = generic_file_llseek,
+ .llseek = btrfs_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 586cf6a4385..13e6255182e 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -4056,13 +4056,7 @@ static int btrfs_dentry_delete(const struct dentry *dentry)
static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
- struct inode *inode;
-
- inode = btrfs_lookup_dentry(dir, dentry);
- if (IS_ERR(inode))
- return ERR_CAST(inode);
-
- return d_splice_alias(inode, dentry);
+ return d_splice_alias(btrfs_lookup_dentry(dir, dentry), dentry);
}
unsigned char btrfs_filetype_table[] = {
@@ -4450,7 +4444,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
inode->i_generation = BTRFS_I(inode)->generation;
btrfs_set_inode_space_info(root, inode);
- if (mode & S_IFDIR)
+ if (S_ISDIR(mode))
owner = 0;
else
owner = 1;
@@ -4495,7 +4489,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
btrfs_inherit_iflags(inode, dir);
- if ((mode & S_IFREG)) {
+ if (S_ISREG(mode)) {
if (btrfs_test_opt(root, NODATASUM))
BTRFS_I(inode)->flags |= BTRFS_INODE_NODATASUM;
if (btrfs_test_opt(root, NODATACOW) ||
@@ -4749,11 +4743,10 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
if (err) {
drop_inode = 1;
} else {
- struct dentry *parent = dget_parent(dentry);
+ struct dentry *parent = dentry->d_parent;
err = btrfs_update_inode(trans, root, inode);
BUG_ON(err);
btrfs_log_new_name(trans, inode, NULL, parent);
- dput(parent);
}
nr = trans->blocks_used;
@@ -6878,7 +6871,7 @@ static int btrfs_getattr(struct vfsmount *mnt,
{
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
- stat->dev = BTRFS_I(inode)->root->anon_super.s_dev;
+ stat->dev = BTRFS_I(inode)->root->anon_dev;
stat->blksize = PAGE_CACHE_SIZE;
stat->blocks = (inode_get_bytes(inode) +
BTRFS_I(inode)->delalloc_bytes) >> 9;
@@ -7046,9 +7039,8 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
BUG_ON(ret);
if (old_ino != BTRFS_FIRST_FREE_OBJECTID) {
- struct dentry *parent = dget_parent(new_dentry);
+ struct dentry *parent = new_dentry->d_parent;
btrfs_log_new_name(trans, old_inode, old_dir, parent);
- dput(parent);
btrfs_end_log_trans(root);
}
out_fail:
@@ -7309,7 +7301,7 @@ static int btrfs_set_page_dirty(struct page *page)
return __set_page_dirty_nobuffers(page);
}
-static int btrfs_permission(struct inode *inode, int mask, unsigned int flags)
+static int btrfs_permission(struct inode *inode, int mask)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -7317,7 +7309,7 @@ static int btrfs_permission(struct inode *inode, int mask, unsigned int flags)
return -EROFS;
if ((BTRFS_I(inode)->flags & BTRFS_INODE_READONLY) && (mask & MAY_WRITE))
return -EACCES;
- return generic_permission(inode, mask, flags, btrfs_check_acl);
+ return generic_permission(inode, mask);
}
static const struct inode_operations btrfs_dir_inode_operations = {
@@ -7337,10 +7329,12 @@ static const struct inode_operations btrfs_dir_inode_operations = {
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
+ .get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_dir_ro_inode_operations = {
.lookup = btrfs_lookup,
.permission = btrfs_permission,
+ .get_acl = btrfs_get_acl,
};
static const struct file_operations btrfs_dir_file_operations = {
@@ -7409,6 +7403,7 @@ static const struct inode_operations btrfs_file_inode_operations = {
.removexattr = btrfs_removexattr,
.permission = btrfs_permission,
.fiemap = btrfs_fiemap,
+ .get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_special_inode_operations = {
.getattr = btrfs_getattr,
@@ -7418,6 +7413,7 @@ static const struct inode_operations btrfs_special_inode_operations = {
.getxattr = btrfs_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
+ .get_acl = btrfs_get_acl,
};
static const struct inode_operations btrfs_symlink_inode_operations = {
.readlink = generic_readlink,
@@ -7429,6 +7425,7 @@ static const struct inode_operations btrfs_symlink_inode_operations = {
.getxattr = btrfs_getxattr,
.listxattr = btrfs_listxattr,
.removexattr = btrfs_removexattr,
+ .get_acl = btrfs_get_acl,
};
const struct dentry_operations btrfs_dentry_operations = {
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index fd252fff4c6..0b980afc5ed 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -323,7 +323,7 @@ static noinline int create_subvol(struct btrfs_root *root,
struct btrfs_inode_item *inode_item;
struct extent_buffer *leaf;
struct btrfs_root *new_root;
- struct dentry *parent = dget_parent(dentry);
+ struct dentry *parent = dentry->d_parent;
struct inode *dir;
int ret;
int err;
@@ -332,10 +332,8 @@ static noinline int create_subvol(struct btrfs_root *root,
u64 index = 0;
ret = btrfs_find_free_objectid(root->fs_info->tree_root, &objectid);
- if (ret) {
- dput(parent);
+ if (ret)
return ret;
- }
dir = parent->d_inode;
@@ -346,10 +344,8 @@ static noinline int create_subvol(struct btrfs_root *root,
* 2 - dir items
*/
trans = btrfs_start_transaction(root, 6);
- if (IS_ERR(trans)) {
- dput(parent);
+ if (IS_ERR(trans))
return PTR_ERR(trans);
- }
leaf = btrfs_alloc_free_block(trans, root, root->leafsize,
0, objectid, NULL, 0, 0, 0);
@@ -439,7 +435,6 @@ static noinline int create_subvol(struct btrfs_root *root,
d_instantiate(dentry, btrfs_lookup_dentry(dir, dentry));
fail:
- dput(parent);
if (async_transid) {
*async_transid = trans->transid;
err = btrfs_commit_transaction_async(trans, root, 1);
@@ -456,7 +451,6 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
bool readonly)
{
struct inode *inode;
- struct dentry *parent;
struct btrfs_pending_snapshot *pending_snapshot;
struct btrfs_trans_handle *trans;
int ret;
@@ -504,9 +498,7 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
if (ret)
goto fail;
- parent = dget_parent(dentry);
- inode = btrfs_lookup_dentry(parent->d_inode, dentry);
- dput(parent);
+ inode = btrfs_lookup_dentry(dentry->d_parent->d_inode, dentry);
if (IS_ERR(inode)) {
ret = PTR_ERR(inode);
goto fail;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-21 19:50:25 +0000