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Merge branch 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

Browse Source 
Pull btrfs updates from Chris Mason:
 "We have a good sized cleanup of our internal read ahead code, and the
  first series of commits from Chandan to enable PAGE_SIZE > sectorsize

  Otherwise, it's a normal series of cleanups and fixes, with many
  thanks to Dave Sterba for doing most of the patch wrangling this time"

* 'for-linus-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (82 commits)
  btrfs: make sure we stay inside the bvec during __btrfs_lookup_bio_sums
  btrfs: Fix misspellings in comments.
  btrfs: Print Warning only if ENOSPC_DEBUG is enabled
  btrfs: scrub: silence an uninitialized variable warning
  btrfs: move btrfs_compression_type to compression.h
  btrfs: rename btrfs_print_info to btrfs_print_mod_info
  Btrfs: Show a warning message if one of objectid reaches its highest value
  Documentation: btrfs: remove usage specific information
  btrfs: use kbasename in btrfsic_mount
  Btrfs: do not collect ordered extents when logging that inode exists
  Btrfs: fix race when checking if we can skip fsync'ing an inode
  Btrfs: fix listxattrs not listing all xattrs packed in the same item
  Btrfs: fix deadlock between direct IO reads and buffered writes
  Btrfs: fix extent_same allowing destination offset beyond i_size
  Btrfs: fix file loss on log replay after renaming a file and fsync
  Btrfs: fix unreplayable log after snapshot delete + parent dir fsync
  Btrfs: fix lockdep deadlock warning due to dev_replace
  btrfs: drop unused argument in btrfs_ioctl_get_supported_features
  btrfs: add GET_SUPPORTED_FEATURES to the control device ioctls
  btrfs: change max_inline default to 2048
  ...
This commit is contained in:
Linus Torvalds 2016-03-21 18:12:42 -07:00
commit 968f3e374f
36 changed files with 1102 additions and 931 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

261
Documentation/filesystems/btrfs.txt
View File

@ -1,20 +1,10 @@
BTRFS
=====
Btrfs is a copy on write filesystem for Linux aimed at
implementing advanced features while focusing on fault tolerance,
repair and easy administration. Initially developed by Oracle, Btrfs
is licensed under the GPL and open for contribution from anyone.
Linux has a wealth of filesystems to choose from, but we are facing a
number of challenges with scaling to the large storage subsystems that
are becoming common in today's data centers. Filesystems need to scale
in their ability to address and manage large storage, and also in
their ability to detect, repair and tolerate errors in the data stored
on disk. Btrfs is under heavy development, and is not suitable for
any uses other than benchmarking and review. The Btrfs disk format is
not yet finalized.
Btrfs is a copy on write filesystem for Linux aimed at implementing advanced
features while focusing on fault tolerance, repair and easy administration.
Jointly developed by several companies, licensed under the GPL and open for
contribution from anyone.
The main Btrfs features include:
@ -28,243 +18,14 @@ The main Btrfs features include:
* Checksums on data and metadata (multiple algorithms available)
* Compression
* Integrated multiple device support, with several raid algorithms
* Online filesystem check (not yet implemented)
* Very fast offline filesystem check
* Efficient incremental backup and FS mirroring (not yet implemented)
* Offline filesystem check
* Efficient incremental backup and FS mirroring
* Online filesystem defragmentation
For more information please refer to the wiki
Mount Options
=============
https://btrfs.wiki.kernel.org
When mounting a btrfs filesystem, the following option are accepted.
Options with (*) are default options and will not show in the mount options.
alloc_start=<bytes>
Debugging option to force all block allocations above a certain
byte threshold on each block device. The value is specified in
bytes, optionally with a K, M, or G suffix, case insensitive.
Default is 1MB.
noautodefrag(*)
autodefrag
Disable/enable auto defragmentation.
Auto defragmentation detects small random writes into files and queue
them up for the defrag process. Works best for small files;
Not well suited for large database workloads.
check_int
check_int_data
check_int_print_mask=<value>
These debugging options control the behavior of the integrity checking
module (the BTRFS_FS_CHECK_INTEGRITY config option required).
check_int enables the integrity checker module, which examines all
block write requests to ensure on-disk consistency, at a large
memory and CPU cost.
check_int_data includes extent data in the integrity checks, and
implies the check_int option.
check_int_print_mask takes a bitmask of BTRFSIC_PRINT_MASK_* values
as defined in fs/btrfs/check-integrity.c, to control the integrity
checker module behavior.
See comments at the top of fs/btrfs/check-integrity.c for more info.
commit=<seconds>
Set the interval of periodic commit, 30 seconds by default. Higher
values defer data being synced to permanent storage with obvious
consequences when the system crashes. The upper bound is not forced,
but a warning is printed if it's more than 300 seconds (5 minutes).
compress
compress=<type>
compress-force
compress-force=<type>
Control BTRFS file data compression. Type may be specified as "zlib"
"lzo" or "no" (for no compression, used for remounting). If no type
is specified, zlib is used. If compress-force is specified,
all files will be compressed, whether or not they compress well.
If compression is enabled, nodatacow and nodatasum are disabled.
degraded
Allow mounts to continue with missing devices. A read-write mount may
fail with too many devices missing, for example if a stripe member
is completely missing.
device=<devicepath>
Specify a device during mount so that ioctls on the control device
can be avoided. Especially useful when trying to mount a multi-device
setup as root. May be specified multiple times for multiple devices.
nodiscard(*)
discard
Disable/enable discard mount option.
Discard issues frequent commands to let the block device reclaim space
freed by the filesystem.
This is useful for SSD devices, thinly provisioned
LUNs and virtual machine images, but may have a significant
performance impact. (The fstrim command is also available to
initiate batch trims from userspace).
noenospc_debug(*)
enospc_debug
Disable/enable debugging option to be more verbose in some ENOSPC conditions.
fatal_errors=<action>
Action to take when encountering a fatal error:
"bug" - BUG() on a fatal error. This is the default.
"panic" - panic() on a fatal error.
noflushoncommit(*)
flushoncommit
The 'flushoncommit' mount option forces any data dirtied by a write in a
prior transaction to commit as part of the current commit. This makes
the committed state a fully consistent view of the file system from the
application's perspective (i.e., it includes all completed file system
operations). This was previously the behavior only when a snapshot is
created.
inode_cache
Enable free inode number caching. Defaults to off due to an overflow
problem when the free space crcs don't fit inside a single page.
max_inline=<bytes>
Specify the maximum amount of space, in bytes, that can be inlined in
a metadata B-tree leaf. The value is specified in bytes, optionally
with a K, M, or G suffix, case insensitive. In practice, this value
is limited by the root sector size, with some space unavailable due
to leaf headers. For a 4k sector size, max inline data is ~3900 bytes.
metadata_ratio=<value>
Specify that 1 metadata chunk should be allocated after every <value>
data chunks. Off by default.
acl(*)
noacl
Enable/disable support for Posix Access Control Lists (ACLs). See the
acl(5) manual page for more information about ACLs.
barrier(*)
nobarrier
Enable/disable the use of block layer write barriers. Write barriers
ensure that certain IOs make it through the device cache and are on
persistent storage. If disabled on a device with a volatile
(non-battery-backed) write-back cache, nobarrier option will lead to
filesystem corruption on a system crash or power loss.
datacow(*)
nodatacow
Enable/disable data copy-on-write for newly created files.
Nodatacow implies nodatasum, and disables all compression.
datasum(*)
nodatasum
Enable/disable data checksumming for newly created files.
Datasum implies datacow.
treelog(*)
notreelog
Enable/disable the tree logging used for fsync and O_SYNC writes.
recovery
Enable autorecovery attempts if a bad tree root is found at mount time.
Currently this scans a list of several previous tree roots and tries to
use the first readable.
rescan_uuid_tree
Force check and rebuild procedure of the UUID tree. This should not
normally be needed.
skip_balance
Skip automatic resume of interrupted balance operation after mount.
May be resumed with "btrfs balance resume."
space_cache (*)
Enable the on-disk freespace cache.
nospace_cache
Disable freespace cache loading without clearing the cache.
clear_cache
Force clearing and rebuilding of the disk space cache if something
has gone wrong.
ssd
nossd
ssd_spread
Options to control ssd allocation schemes. By default, BTRFS will
enable or disable ssd allocation heuristics depending on whether a
rotational or non-rotational disk is in use. The ssd and nossd options
can override this autodetection.
The ssd_spread mount option attempts to allocate into big chunks
of unused space, and may perform better on low-end ssds. ssd_spread
implies ssd, enabling all other ssd heuristics as well.
subvol=<path>
Mount subvolume at <path> rather than the root subvolume. <path> is
relative to the top level subvolume.
subvolid=<ID>
Mount subvolume specified by an ID number rather than the root subvolume.
This allows mounting of subvolumes which are not in the root of the mounted
filesystem.
You can use "btrfs subvolume list" to see subvolume ID numbers.
subvolrootid=<objectid> (deprecated)
Mount subvolume specified by <objectid> rather than the root subvolume.
This allows mounting of subvolumes which are not in the root of the mounted
filesystem.
You can use "btrfs subvolume show " to see the object ID for a subvolume.
thread_pool=<number>
The number of worker threads to allocate. The default number is equal
to the number of CPUs + 2, or 8, whichever is smaller.
user_subvol_rm_allowed
Allow subvolumes to be deleted by a non-root user. Use with caution.
MAILING LIST
============
There is a Btrfs mailing list hosted on vger.kernel.org. You can
find details on how to subscribe here:
http://vger.kernel.org/vger-lists.html#linux-btrfs
Mailing list archives are available from gmane:
http://dir.gmane.org/gmane.comp.file-systems.btrfs
IRC
===
Discussion of Btrfs also occurs on the #btrfs channel of the Freenode
IRC network.
UTILITIES
=========
Userspace tools for creating and manipulating Btrfs file systems are
available from the git repository at the following location:
http://git.kernel.org/?p=linux/kernel/git/mason/btrfs-progs.git
git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-progs.git
These include the following tools:
* mkfs.btrfs: create a filesystem
* btrfs: a single tool to manage the filesystems, refer to the manpage for more details
* 'btrfsck' or 'btrfs check': do a consistency check of the filesystem
Other tools for specific tasks:
* btrfs-convert: in-place conversion from ext2/3/4 filesystems
* btrfs-image: dump filesystem metadata for debugging
that maintains information about administration tasks, frequently asked
questions, use cases, mount options, comprehensible changelogs, features,
manual pages, source code repositories, contacts etc.

12
fs/btrfs/backref.c
View File

@ -148,8 +148,7 @@ int __init btrfs_prelim_ref_init(void)
void btrfs_prelim_ref_exit(void)
{
if (btrfs_prelim_ref_cache)
kmem_cache_destroy(btrfs_prelim_ref_cache);
kmem_cache_destroy(btrfs_prelim_ref_cache);
}
/*
@ -566,17 +565,14 @@ static void __merge_refs(struct list_head *head, int mode)
struct __prelim_ref *pos2 = pos1, *tmp;
list_for_each_entry_safe_continue(pos2, tmp, head, list) {
struct __prelim_ref *xchg, *ref1 = pos1, *ref2 = pos2;
struct __prelim_ref *ref1 = pos1, *ref2 = pos2;
struct extent_inode_elem *eie;
if (!ref_for_same_block(ref1, ref2))
continue;
if (mode == 1) {
if (!ref1->parent && ref2->parent) {
xchg = ref1;
ref1 = ref2;
ref2 = xchg;
}
if (!ref1->parent && ref2->parent)
swap(ref1, ref2);
} else {
if (ref1->parent != ref2->parent)
continue;

12
fs/btrfs/check-integrity.c
View File

@ -95,6 +95,7 @@
#include <linux/genhd.h>
#include <linux/blkdev.h>
#include <linux/vmalloc.h>
#include <linux/string.h>
#include "ctree.h"
#include "disk-io.h"
#include "hash.h"
@ -105,6 +106,7 @@
#include "locking.h"
#include "check-integrity.h"
#include "rcu-string.h"
#include "compression.h"
#define BTRFSIC_BLOCK_HASHTABLE_SIZE 0x10000
#define BTRFSIC_BLOCK_LINK_HASHTABLE_SIZE 0x10000
@ -176,7 +178,7 @@ struct btrfsic_block {
* Elements of this type are allocated dynamically and required because
* each block object can refer to and can be ref from multiple blocks.
* The key to lookup them in the hashtable is the dev_bytenr of
* the block ref to plus the one from the block refered from.
* the block ref to plus the one from the block referred from.
* The fact that they are searchable via a hashtable and that a
* ref_cnt is maintained is not required for the btrfs integrity
* check algorithm itself, it is only used to make the output more
@ -3076,7 +3078,7 @@ int btrfsic_mount(struct btrfs_root *root,
list_for_each_entry(device, dev_head, dev_list) {
struct btrfsic_dev_state *ds;
char *p;
const char *p;
if (!device->bdev || !device->name)
continue;
@ -3092,11 +3094,7 @@ int btrfsic_mount(struct btrfs_root *root,
ds->state = state;
bdevname(ds->bdev, ds->name);
ds->name[BDEVNAME_SIZE - 1] = '\0';
for (p = ds->name; *p != '\0'; p++);
while (p > ds->name && *p != '/')
p--;
if (*p == '/')
p++;
p = kbasename(ds->name);
strlcpy(ds->name, p, sizeof(ds->name));
btrfsic_dev_state_hashtable_add(ds,
&btrfsic_dev_state_hashtable);

9
fs/btrfs/compression.h
View File

@ -48,6 +48,15 @@ int btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
void btrfs_clear_biovec_end(struct bio_vec *bvec, int vcnt,
unsigned long pg_index,
unsigned long pg_offset);
enum btrfs_compression_type {
BTRFS_COMPRESS_NONE = 0,
BTRFS_COMPRESS_ZLIB = 1,
BTRFS_COMPRESS_LZO = 2,
BTRFS_COMPRESS_TYPES = 2,
BTRFS_COMPRESS_LAST = 3,
};
struct btrfs_compress_op {
struct list_head *(*alloc_workspace)(void);

36
fs/btrfs/ctree.c
View File

@ -311,7 +311,7 @@ struct tree_mod_root {
struct tree_mod_elem {
struct rb_node node;
u64 index; /* shifted logical */
u64 logical;
u64 seq;
enum mod_log_op op;
@ -435,11 +435,11 @@ void btrfs_put_tree_mod_seq(struct btrfs_fs_info *fs_info,
/*
* key order of the log:
* index -> sequence
* node/leaf start address -> sequence
*
* the index is the shifted logical of the *new* root node for root replace
* operations, or the shifted logical of the affected block for all other
* operations.
* The 'start address' is the logical address of the *new* root node
* for root replace operations, or the logical address of the affected
* block for all other operations.
*
* Note: must be called with write lock (tree_mod_log_write_lock).
*/
@ -460,9 +460,9 @@ __tree_mod_log_insert(struct btrfs_fs_info *fs_info, struct tree_mod_elem *tm)
while (*new) {
cur = container_of(*new, struct tree_mod_elem, node);
parent = *new;
if (cur->index < tm->index)
if (cur->logical < tm->logical)
new = &((*new)->rb_left);
else if (cur->index > tm->index)
else if (cur->logical > tm->logical)
new = &((*new)->rb_right);
else if (cur->seq < tm->seq)
new = &((*new)->rb_left);
@ -523,7 +523,7 @@ alloc_tree_mod_elem(struct extent_buffer *eb, int slot,
if (!tm)
return NULL;
tm->index = eb->start >> PAGE_CACHE_SHIFT;
tm->logical = eb->start;
if (op != MOD_LOG_KEY_ADD) {
btrfs_node_key(eb, &tm->key, slot);
tm->blockptr = btrfs_node_blockptr(eb, slot);
@ -588,7 +588,7 @@ tree_mod_log_insert_move(struct btrfs_fs_info *fs_info,
goto free_tms;
}
tm->index = eb->start >> PAGE_CACHE_SHIFT;
tm->logical = eb->start;
tm->slot = src_slot;
tm->move.dst_slot = dst_slot;
tm->move.nr_items = nr_items;
@ -699,7 +699,7 @@ tree_mod_log_insert_root(struct btrfs_fs_info *fs_info,
goto free_tms;
}
tm->index = new_root->start >> PAGE_CACHE_SHIFT;
tm->logical = new_root->start;
tm->old_root.logical = old_root->start;
tm->old_root.level = btrfs_header_level(old_root);
tm->generation = btrfs_header_generation(old_root);
@ -739,16 +739,15 @@ __tree_mod_log_search(struct btrfs_fs_info *fs_info, u64 start, u64 min_seq,
struct rb_node *node;
struct tree_mod_elem *cur = NULL;
struct tree_mod_elem *found = NULL;
u64 index = start >> PAGE_CACHE_SHIFT;
tree_mod_log_read_lock(fs_info);
tm_root = &fs_info->tree_mod_log;
node = tm_root->rb_node;
while (node) {
cur = container_of(node, struct tree_mod_elem, node);
if (cur->index < index) {
if (cur->logical < start) {
node = node->rb_left;
} else if (cur->index > index) {
} else if (cur->logical > start) {
node = node->rb_right;
} else if (cur->seq < min_seq) {
node = node->rb_left;
@ -1230,9 +1229,10 @@ __tree_mod_log_oldest_root(struct btrfs_fs_info *fs_info,
return NULL;
/*
* the very last operation that's logged for a root is the replacement
* operation (if it is replaced at all). this has the index of the *new*
* root, making it the very first operation that's logged for this root.
* the very last operation that's logged for a root is the
* replacement operation (if it is replaced at all). this has
* the logical address of the *new* root, making it the very
* first operation that's logged for this root.
*/
while (1) {
tm = tree_mod_log_search_oldest(fs_info, root_logical,
@ -1336,7 +1336,7 @@ __tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct extent_buffer *eb,
if (!next)
break;
tm = container_of(next, struct tree_mod_elem, node);
if (tm->index != first_tm->index)
if (tm->logical != first_tm->logical)
break;
}
tree_mod_log_read_unlock(fs_info);
@ -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;

87
fs/btrfs/ctree.h
View File

@ -100,6 +100,9 @@ struct btrfs_ordered_sum;
/* tracks free space in block groups. */
#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
/* device stats in the device tree */
#define BTRFS_DEV_STATS_OBJECTID 0ULL
/* for storing balance parameters in the root tree */
#define BTRFS_BALANCE_OBJECTID -4ULL
@ -715,14 +718,6 @@ struct btrfs_timespec {
__le32 nsec;
} __attribute__ ((__packed__));
enum btrfs_compression_type {
BTRFS_COMPRESS_NONE = 0,
BTRFS_COMPRESS_ZLIB = 1,
BTRFS_COMPRESS_LZO = 2,
BTRFS_COMPRESS_TYPES = 2,
BTRFS_COMPRESS_LAST = 3,
};
struct btrfs_inode_item {
/* nfs style generation number */
__le64 generation;
@ -793,7 +788,7 @@ struct btrfs_root_item {
/*
* This generation number is used to test if the new fields are valid
* and up to date while reading the root item. Everytime the root item
* and up to date while reading the root item. Every time the root item
* is written out, the "generation" field is copied into this field. If
* anyone ever mounted the fs with an older kernel, we will have
* mismatching generation values here and thus must invalidate the
@ -1002,8 +997,10 @@ struct btrfs_dev_replace {
pid_t lock_owner;
atomic_t nesting_level;
struct mutex lock_finishing_cancel_unmount;
struct mutex lock_management_lock;
struct mutex lock;
rwlock_t lock;
atomic_t read_locks;
atomic_t blocking_readers;
wait_queue_head_t read_lock_wq;
struct btrfs_scrub_progress scrub_progress;
};
@ -1222,10 +1219,10 @@ struct btrfs_space_info {
* we've called update_block_group and dropped the bytes_used counter
* and increased the bytes_pinned counter. However this means that
* bytes_pinned does not reflect the bytes that will be pinned once the
* delayed refs are flushed, so this counter is inc'ed everytime we call
* btrfs_free_extent so it is a realtime count of what will be freed
* once the transaction is committed. It will be zero'ed everytime the
* transaction commits.
* delayed refs are flushed, so this counter is inc'ed every time we
* call btrfs_free_extent so it is a realtime count of what will be
* freed once the transaction is committed. It will be zero'ed every
* time the transaction commits.
*/
struct percpu_counter total_bytes_pinned;
@ -1822,6 +1819,9 @@ struct btrfs_fs_info {
spinlock_t reada_lock;
struct radix_tree_root reada_tree;
/* readahead works cnt */
atomic_t reada_works_cnt;
/* Extent buffer radix tree */
spinlock_t buffer_lock;
struct radix_tree_root buffer_radix;
@ -2185,13 +2185,43 @@ struct btrfs_ioctl_defrag_range_args {
*/
#define BTRFS_QGROUP_RELATION_KEY 246
/*
* Obsolete name, see BTRFS_TEMPORARY_ITEM_KEY.
*/
#define BTRFS_BALANCE_ITEM_KEY 248
/*
* Persistantly stores the io stats in the device tree.
* One key for all stats, (0, BTRFS_DEV_STATS_KEY, devid).
* The key type for tree items that are stored persistently, but do not need to
* exist for extended period of time. The items can exist in any tree.
*
* [subtype, BTRFS_TEMPORARY_ITEM_KEY, data]
*
* Existing items:
*
* - balance status item
* (BTRFS_BALANCE_OBJECTID, BTRFS_TEMPORARY_ITEM_KEY, 0)
*/
#define BTRFS_DEV_STATS_KEY 249
#define BTRFS_TEMPORARY_ITEM_KEY 248
/*
* Obsolete name, see BTRFS_PERSISTENT_ITEM_KEY
*/
#define BTRFS_DEV_STATS_KEY 249
/*
* The key type for tree items that are stored persistently and usually exist
* for a long period, eg. filesystem lifetime. The item kinds can be status
* information, stats or preference values. The item can exist in any tree.
*
* [subtype, BTRFS_PERSISTENT_ITEM_KEY, data]
*
* Existing items:
*
* - device statistics, store IO stats in the device tree, one key for all
* stats
* (BTRFS_DEV_STATS_OBJECTID, BTRFS_DEV_STATS_KEY, 0)
*/
#define BTRFS_PERSISTENT_ITEM_KEY 249
/*
* Persistantly stores the device replace state in the device tree.
@ -2241,7 +2271,7 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_ENOSPC_DEBUG (1 << 15)
#define BTRFS_MOUNT_AUTO_DEFRAG (1 << 16)
#define BTRFS_MOUNT_INODE_MAP_CACHE (1 << 17)
#define BTRFS_MOUNT_RECOVERY (1 << 18)
#define BTRFS_MOUNT_USEBACKUPROOT (1 << 18)
#define BTRFS_MOUNT_SKIP_BALANCE (1 << 19)
#define BTRFS_MOUNT_CHECK_INTEGRITY (1 << 20)
#define BTRFS_MOUNT_CHECK_INTEGRITY_INCLUDING_EXTENT_DATA (1 << 21)
@ -2250,9 +2280,10 @@ struct btrfs_ioctl_defrag_range_args {
#define BTRFS_MOUNT_FRAGMENT_DATA (1 << 24)
#define BTRFS_MOUNT_FRAGMENT_METADATA (1 << 25)
#define BTRFS_MOUNT_FREE_SPACE_TREE (1 << 26)
#define BTRFS_MOUNT_NOLOGREPLAY (1 << 27)
#define BTRFS_DEFAULT_COMMIT_INTERVAL (30)
#define BTRFS_DEFAULT_MAX_INLINE (8192)
#define BTRFS_DEFAULT_MAX_INLINE (2048)
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
@ -2353,6 +2384,9 @@ struct btrfs_map_token {
unsigned long offset;
};
#define BTRFS_BYTES_TO_BLKS(fs_info, bytes) \
((bytes) >> (fs_info)->sb->s_blocksize_bits)
static inline void btrfs_init_map_token (struct btrfs_map_token *token)
{
token->kaddr = NULL;
@ -3448,8 +3482,7 @@ u64 btrfs_csum_bytes_to_leaves(struct btrfs_root *root, u64 csum_bytes);
static inline u64 btrfs_calc_trans_metadata_size(struct btrfs_root *root,
unsigned num_items)
{
return (root->nodesize + root->nodesize * (BTRFS_MAX_LEVEL - 1)) *
2 * num_items;
return root->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;
}
/*
@ -4027,7 +4060,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *dir, u64 objectid,
const char *name, int name_len);
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
int front);
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@ -4089,6 +4122,7 @@ void btrfs_test_inode_set_ops(struct inode *inode);
/* ioctl.c */
long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int btrfs_ioctl_get_supported_features(void __user *arg);
void btrfs_update_iflags(struct inode *inode);
void btrfs_inherit_iflags(struct inode *inode, struct inode *dir);
int btrfs_is_empty_uuid(u8 *uuid);
@ -4151,7 +4185,8 @@ void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info);
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
/* super.c */
int btrfs_parse_options(struct btrfs_root *root, char *options);
int btrfs_parse_options(struct btrfs_root *root, char *options,
unsigned long new_flags);
int btrfs_sync_fs(struct super_block *sb, int wait);
#ifdef CONFIG_PRINTK
@ -4525,8 +4560,8 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
struct btrfs_key *start, struct btrfs_key *end);
int btrfs_reada_wait(void *handle);
void btrfs_reada_detach(void *handle);
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
u64 start, int err);
int btree_readahead_hook(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, u64 start, int err);
static inline int is_fstree(u64 rootid)
{

10
fs/btrfs/delayed-inode.c
View File

@ -43,8 +43,7 @@ int __init btrfs_delayed_inode_init(void)
void btrfs_delayed_inode_exit(void)
{
if (delayed_node_cache)
kmem_cache_destroy(delayed_node_cache);
kmem_cache_destroy(delayed_node_cache);
}
static inline void btrfs_init_delayed_node(
@ -651,9 +650,14 @@ static int btrfs_delayed_inode_reserve_metadata(
goto out;
ret = btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes);
if (!WARN_ON(ret))
if (!ret)
goto out;
if (btrfs_test_opt(root, ENOSPC_DEBUG)) {
btrfs_debug(root->fs_info,
"block rsv migrate returned %d", ret);
WARN_ON(1);
}
/*
* Ok this is a problem, let's just steal from the global rsv
* since this really shouldn't happen that often.

12
fs/btrfs/delayed-ref.c
View File

@ -929,14 +929,10 @@ btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr)
void btrfs_delayed_ref_exit(void)
{
if (btrfs_delayed_ref_head_cachep)
kmem_cache_destroy(btrfs_delayed_ref_head_cachep);
if (btrfs_delayed_tree_ref_cachep)
kmem_cache_destroy(btrfs_delayed_tree_ref_cachep);
if (btrfs_delayed_data_ref_cachep)
kmem_cache_destroy(btrfs_delayed_data_ref_cachep);
if (btrfs_delayed_extent_op_cachep)
kmem_cache_destroy(btrfs_delayed_extent_op_cachep);
kmem_cache_destroy(btrfs_delayed_ref_head_cachep);
kmem_cache_destroy(btrfs_delayed_tree_ref_cachep);
kmem_cache_destroy(btrfs_delayed_data_ref_cachep);
kmem_cache_destroy(btrfs_delayed_extent_op_cachep);
}
int btrfs_delayed_ref_init(void)

136
fs/btrfs/dev-replace.c
View File

@ -202,13 +202,13 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
struct btrfs_dev_replace_item *ptr;
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 0);
if (!dev_replace->is_valid ||
!dev_replace->item_needs_writeback) {
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
return 0;
}
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
key.objectid = 0;
key.type = BTRFS_DEV_REPLACE_KEY;
@ -264,7 +264,7 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
ptr = btrfs_item_ptr(eb, path->slots[0],
struct btrfs_dev_replace_item);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
if (dev_replace->srcdev)
btrfs_set_dev_replace_src_devid(eb, ptr,
dev_replace->srcdev->devid);
@ -287,7 +287,7 @@ int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
btrfs_set_dev_replace_cursor_right(eb, ptr,
dev_replace->cursor_right);
dev_replace->item_needs_writeback = 0;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
btrfs_mark_buffer_dirty(eb);
@ -356,7 +356,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
return PTR_ERR(trans);
}
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
@ -395,7 +395,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
dev_replace->is_valid = 1;
dev_replace->item_needs_writeback = 1;
args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
ret = btrfs_sysfs_add_device_link(tgt_device->fs_devices, tgt_device);
if (ret)
@ -407,7 +407,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
goto leave;
}
@ -433,7 +433,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
leave:
dev_replace->srcdev = NULL;
dev_replace->tgtdev = NULL;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
btrfs_destroy_dev_replace_tgtdev(fs_info, tgt_device);
return ret;
}
@ -471,18 +471,18 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
/* don't allow cancel or unmount to disturb the finishing procedure */
mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 0);
/* was the operation canceled, or is it finished? */
if (dev_replace->replace_state !=
BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED) {
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
return 0;
}
tgt_device = dev_replace->tgtdev;
src_device = dev_replace->srcdev;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
/*
* flush all outstanding I/O and inode extent mappings before the
@ -507,7 +507,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
/* keep away write_all_supers() during the finishing procedure */
mutex_lock(&root->fs_info->fs_devices->device_list_mutex);
mutex_lock(&root->fs_info->chunk_mutex);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
dev_replace->replace_state =
scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED
: BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED;
@ -528,7 +528,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
rcu_str_deref(src_device->name),
src_device->devid,
rcu_str_deref(tgt_device->name), scrub_ret);
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
mutex_unlock(&root->fs_info->chunk_mutex);
mutex_unlock(&root->fs_info->fs_devices->device_list_mutex);
mutex_unlock(&uuid_mutex);
@ -565,7 +565,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
list_add(&tgt_device->dev_alloc_list, &fs_info->fs_devices->alloc_list);
fs_info->fs_devices->rw_devices++;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
btrfs_rm_dev_replace_blocked(fs_info);
@ -649,7 +649,7 @@ void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
struct btrfs_device *srcdev;
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 0);
/* even if !dev_replace_is_valid, the values are good enough for
* the replace_status ioctl */
args->result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR;
@ -675,7 +675,7 @@ void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
div_u64(btrfs_device_get_total_bytes(srcdev), 1000));
break;
}
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
}
int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info,
@ -698,13 +698,13 @@ static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
return -EROFS;
mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
result = BTRFS_IOCTL_DEV_REPLACE_RESULT_NOT_STARTED;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
goto leave;
case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
@ -717,7 +717,7 @@ static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
dev_replace->replace_state = BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED;
dev_replace->time_stopped = get_seconds();
dev_replace->item_needs_writeback = 1;
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
btrfs_scrub_cancel(fs_info);
trans = btrfs_start_transaction(root, 0);
@ -740,7 +740,7 @@ void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info)
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
mutex_lock(&dev_replace->lock_finishing_cancel_unmount);
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
@ -756,7 +756,7 @@ void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info)
break;
}
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
}
@ -766,12 +766,12 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info)
struct task_struct *task;
struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 1);
switch (dev_replace->replace_state) {
case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:
case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
return 0;
case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
break;
@ -784,10 +784,10 @@ int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info)
btrfs_info(fs_info, "cannot continue dev_replace, tgtdev is missing");
btrfs_info(fs_info,
"you may cancel the operation after 'mount -o degraded'");
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
return 0;
}
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 1);
WARN_ON(atomic_xchg(
&fs_info->mutually_exclusive_operation_running, 1));
@ -802,7 +802,7 @@ static int btrfs_dev_replace_kthread(void *data)
struct btrfs_ioctl_dev_replace_args *status_args;
u64 progress;
status_args = kzalloc(sizeof(*status_args), GFP_NOFS);
status_args = kzalloc(sizeof(*status_args), GFP_KERNEL);
if (status_args) {
btrfs_dev_replace_status(fs_info, status_args);
progress = status_args->status.progress_1000;
@ -858,57 +858,67 @@ int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace)
* not called and the the filesystem is remounted
* in degraded state. This does not stop the
* dev_replace procedure. It needs to be canceled
* manually if the cancelation is wanted.
* manually if the cancellation is wanted.
*/
break;
}
return 1;
}
void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace)
void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace, int rw)
{
/* the beginning is just an optimization for the typical case */
if (atomic_read(&dev_replace->nesting_level) == 0) {
acquire_lock:
/* this is not a nested case where the same thread
* is trying to acqurire the same lock twice */
mutex_lock(&dev_replace->lock);
mutex_lock(&dev_replace->lock_management_lock);
dev_replace->lock_owner = current->pid;
atomic_inc(&dev_replace->nesting_level);
mutex_unlock(&dev_replace->lock_management_lock);
return;
if (rw == 1) {
/* write */
again:
wait_event(dev_replace->read_lock_wq,
atomic_read(&dev_replace->blocking_readers) == 0);
write_lock(&dev_replace->lock);
if (atomic_read(&dev_replace->blocking_readers)) {
write_unlock(&dev_replace->lock);
goto again;
}
} else {
read_lock(&dev_replace->lock);
atomic_inc(&dev_replace->read_locks);
}
mutex_lock(&dev_replace->lock_management_lock);
if (atomic_read(&dev_replace->nesting_level) > 0 &&
dev_replace->lock_owner == current->pid) {
WARN_ON(!mutex_is_locked(&dev_replace->lock));
atomic_inc(&dev_replace->nesting_level);
mutex_unlock(&dev_replace->lock_management_lock);
return;
}
mutex_unlock(&dev_replace->lock_management_lock);
goto acquire_lock;
}
void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace)
void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace, int rw)
{
WARN_ON(!mutex_is_locked(&dev_replace->lock));
mutex_lock(&dev_replace->lock_management_lock);
WARN_ON(atomic_read(&dev_replace->nesting_level) < 1);
WARN_ON(dev_replace->lock_owner != current->pid);
atomic_dec(&dev_replace->nesting_level);
if (atomic_read(&dev_replace->nesting_level) == 0) {
dev_replace->lock_owner = 0;
mutex_unlock(&dev_replace->lock_management_lock);
mutex_unlock(&dev_replace->lock);
if (rw == 1) {
/* write */
ASSERT(atomic_read(&dev_replace->blocking_readers) == 0);
write_unlock(&dev_replace->lock);
} else {
mutex_unlock(&dev_replace->lock_management_lock);
ASSERT(atomic_read(&dev_replace->read_locks) > 0);
atomic_dec(&dev_replace->read_locks);
read_unlock(&dev_replace->lock);
}
}
/* inc blocking cnt and release read lock */
void btrfs_dev_replace_set_lock_blocking(
struct btrfs_dev_replace *dev_replace)
{
/* only set blocking for read lock */
ASSERT(atomic_read(&dev_replace->read_locks) > 0);
atomic_inc(&dev_replace->blocking_readers);
read_unlock(&dev_replace->lock);
}
/* acquire read lock and dec blocking cnt */
void btrfs_dev_replace_clear_lock_blocking(
struct btrfs_dev_replace *dev_replace)
{
/* only set blocking for read lock */
ASSERT(atomic_read(&dev_replace->read_locks) > 0);
ASSERT(atomic_read(&dev_replace->blocking_readers) > 0);
read_lock(&dev_replace->lock);
if (atomic_dec_and_test(&dev_replace->blocking_readers) &&
waitqueue_active(&dev_replace->read_lock_wq))
wake_up(&dev_replace->read_lock_wq);
}
void btrfs_bio_counter_inc_noblocked(struct btrfs_fs_info *fs_info)
{
percpu_counter_inc(&fs_info->bio_counter);

7
fs/btrfs/dev-replace.h
View File

@ -34,8 +34,11 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info,
void btrfs_dev_replace_suspend_for_unmount(struct btrfs_fs_info *fs_info);
int btrfs_resume_dev_replace_async(struct btrfs_fs_info *fs_info);
int btrfs_dev_replace_is_ongoing(struct btrfs_dev_replace *dev_replace);
void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace);
void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace);
void btrfs_dev_replace_lock(struct btrfs_dev_replace *dev_replace, int rw);
void btrfs_dev_replace_unlock(struct btrfs_dev_replace *dev_replace, int rw);
void btrfs_dev_replace_set_lock_blocking(struct btrfs_dev_replace *dev_replace);
void btrfs_dev_replace_clear_lock_blocking(
struct btrfs_dev_replace *dev_replace);
static inline void btrfs_dev_replace_stats_inc(atomic64_t *stat_value)
{

71
fs/btrfs/disk-io.c
View File

@ -50,6 +50,7 @@
#include "raid56.h"
#include "sysfs.h"
#include "qgroup.h"
#include "compression.h"
#ifdef CONFIG_X86
#include <asm/cpufeature.h>
@ -110,8 +111,7 @@ int __init btrfs_end_io_wq_init(void)
void btrfs_end_io_wq_exit(void)
{
if (btrfs_end_io_wq_cache)
kmem_cache_destroy(btrfs_end_io_wq_cache);
kmem_cache_destroy(btrfs_end_io_wq_cache);
}
/*
@ -612,6 +612,7 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
int found_level;
struct extent_buffer *eb;
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
int ret = 0;
int reads_done;
@ -637,21 +638,21 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
found_start = btrfs_header_bytenr(eb);
if (found_start != eb->start) {
btrfs_err_rl(eb->fs_info, "bad tree block start %llu %llu",
found_start, eb->start);
btrfs_err_rl(fs_info, "bad tree block start %llu %llu",
found_start, eb->start);
ret = -EIO;
goto err;
}
if (check_tree_block_fsid(root->fs_info, eb)) {
btrfs_err_rl(eb->fs_info, "bad fsid on block %llu",
eb->start);
if (check_tree_block_fsid(fs_info, eb)) {
btrfs_err_rl(fs_info, "bad fsid on block %llu",
eb->start);
ret = -EIO;
goto err;
}
found_level = btrfs_header_level(eb);
if (found_level >= BTRFS_MAX_LEVEL) {
btrfs_err(root->fs_info, "bad tree block level %d",
(int)btrfs_header_level(eb));
btrfs_err(fs_info, "bad tree block level %d",
(int)btrfs_header_level(eb));
ret = -EIO;
goto err;
}
@ -659,7 +660,7 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
eb, found_level);
ret = csum_tree_block(root->fs_info, eb, 1);
ret = csum_tree_block(fs_info, eb, 1);
if (ret) {
ret = -EIO;
goto err;
@ -680,7 +681,7 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
err:
if (reads_done &&
test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
btree_readahead_hook(root, eb, eb->start, ret);
btree_readahead_hook(fs_info, eb, eb->start, ret);
if (ret) {
/*
@ -699,14 +700,13 @@ out:
static int btree_io_failed_hook(struct page *page, int failed_mirror)
{
struct extent_buffer *eb;
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
eb = (struct extent_buffer *)page->private;
set_bit(EXTENT_BUFFER_READ_ERR, &eb->bflags);
eb->read_mirror = failed_mirror;
atomic_dec(&eb->io_pages);
if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
btree_readahead_hook(root, eb, eb->start, -EIO);
btree_readahead_hook(eb->fs_info, eb, eb->start, -EIO);
return -EIO; /* we fixed nothing */
}
@ -816,7 +816,7 @@ static void run_one_async_done(struct btrfs_work *work)
waitqueue_active(&fs_info->async_submit_wait))
wake_up(&fs_info->async_submit_wait);
/* If an error occured we just want to clean up the bio and move on */
/* If an error occurred we just want to clean up the bio and move on */
if (async->error) {
async->bio->bi_error = async->error;
bio_endio(async->bio);
@ -1296,9 +1296,10 @@ static void __setup_root(u32 nodesize, u32 sectorsize, u32 stripesize,
spin_lock_init(&root->root_item_lock);
}
static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info)
static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
gfp_t flags)
{
struct btrfs_root *root = kzalloc(sizeof(*root), GFP_NOFS);
struct btrfs_root *root = kzalloc(sizeof(*root), flags);
if (root)
root->fs_info = fs_info;
return root;
@ -1310,7 +1311,7 @@ struct btrfs_root *btrfs_alloc_dummy_root(void)
{
struct btrfs_root *root;
root = btrfs_alloc_root(NULL);
root = btrfs_alloc_root(NULL, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
__setup_root(4096, 4096, 4096, root, NULL, 1);
@ -1332,7 +1333,7 @@ struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
int ret = 0;
uuid_le uuid;
root = btrfs_alloc_root(fs_info);
root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!root)
return ERR_PTR(-ENOMEM);
@ -1408,7 +1409,7 @@ static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *tree_root = fs_info->tree_root;
struct extent_buffer *leaf;
root = btrfs_alloc_root(fs_info);
root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root)
return ERR_PTR(-ENOMEM);
@ -1506,7 +1507,7 @@ static struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
if (!path)
return ERR_PTR(-ENOMEM);
root = btrfs_alloc_root(fs_info);
root = btrfs_alloc_root(fs_info, GFP_NOFS);
if (!root) {
ret = -ENOMEM;
goto alloc_fail;
@ -2272,9 +2273,11 @@ static void btrfs_init_dev_replace_locks(struct btrfs_fs_info *fs_info)
fs_info->dev_replace.lock_owner = 0;
atomic_set(&fs_info->dev_replace.nesting_level, 0);
mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount);
mutex_init(&fs_info->dev_replace.lock_management_lock);
mutex_init(&fs_info->dev_replace.lock);
rwlock_init(&fs_info->dev_replace.lock);
atomic_set(&fs_info->dev_replace.read_locks, 0);
atomic_set(&fs_info->dev_replace.blocking_readers, 0);
init_waitqueue_head(&fs_info->replace_wait);
init_waitqueue_head(&fs_info->dev_replace.read_lock_wq);
}
static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
@ -2385,7 +2388,7 @@ static int btrfs_replay_log(struct btrfs_fs_info *fs_info,
return -EIO;
}
log_tree_root = btrfs_alloc_root(fs_info);
log_tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!log_tree_root)
return -ENOMEM;
@ -2510,8 +2513,8 @@ int open_ctree(struct super_block *sb,
int backup_index = 0;
int max_active;
tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info);
chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info);
tree_root = fs_info->tree_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
chunk_root = fs_info->chunk_root = btrfs_alloc_root(fs_info, GFP_KERNEL);
if (!tree_root || !chunk_root) {
err = -ENOMEM;
goto fail;
@ -2603,6 +2606,7 @@ int open_ctree(struct super_block *sb,
atomic_set(&fs_info->nr_async_bios, 0);
atomic_set(&fs_info->defrag_running, 0);
atomic_set(&fs_info->qgroup_op_seq, 0);
atomic_set(&fs_info->reada_works_cnt, 0);
atomic64_set(&fs_info->tree_mod_seq, 0);
fs_info->sb = sb;
fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE;
@ -2622,7 +2626,7 @@ int open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->ordered_roots);
spin_lock_init(&fs_info->ordered_root_lock);
fs_info->delayed_root = kmalloc(sizeof(struct btrfs_delayed_root),
GFP_NOFS);
GFP_KERNEL);
if (!fs_info->delayed_root) {
err = -ENOMEM;
goto fail_iput;
@ -2750,7 +2754,7 @@ int open_ctree(struct super_block *sb,
*/
fs_info->compress_type = BTRFS_COMPRESS_ZLIB;
ret = btrfs_parse_options(tree_root, options);
ret = btrfs_parse_options(tree_root, options, sb->s_flags);
if (ret) {
err = ret;
goto fail_alloc;
@ -3029,8 +3033,9 @@ retry_root_backup:
if (ret)
goto fail_trans_kthread;
/* do not make disk changes in broken FS */
if (btrfs_super_log_root(disk_super) != 0) {
/* do not make disk changes in broken FS or nologreplay is given */
if (btrfs_super_log_root(disk_super) != 0 &&
!btrfs_test_opt(tree_root, NOLOGREPLAY)) {
ret = btrfs_replay_log(fs_info, fs_devices);
if (ret) {
err = ret;
@ -3146,6 +3151,12 @@ retry_root_backup:
fs_info->open = 1;
/*
* backuproot only affect mount behavior, and if open_ctree succeeded,
* no need to keep the flag
*/
btrfs_clear_opt(fs_info->mount_opt, USEBACKUPROOT);
return 0;
fail_qgroup:
@ -3200,7 +3211,7 @@ fail:
return err;
recovery_tree_root:
if (!btrfs_test_opt(tree_root, RECOVERY))
if (!btrfs_test_opt(tree_root, USEBACKUPROOT))
goto fail_tree_roots;
free_root_pointers(fs_info, 0);

40
fs/btrfs/extent-tree.c
View File

@ -4838,7 +4838,7 @@ static inline int need_do_async_reclaim(struct btrfs_space_info *space_info,
u64 thresh = div_factor_fine(space_info->total_bytes, 98);
/* If we're just plain full then async reclaim just slows us down. */
if (space_info->bytes_used >= thresh)
if ((space_info->bytes_used + space_info->bytes_reserved) >= thresh)
return 0;
return (used >= thresh && !btrfs_fs_closing(fs_info) &&
@ -5373,27 +5373,33 @@ static void update_global_block_rsv(struct btrfs_fs_info *fs_info)
block_rsv->size = min_t(u64, num_bytes, SZ_512M);
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly +
sinfo->bytes_may_use;
if (sinfo->total_bytes > num_bytes) {
num_bytes = sinfo->total_bytes - num_bytes;
block_rsv->reserved += num_bytes;
sinfo->bytes_may_use += num_bytes;
trace_btrfs_space_reservation(fs_info, "space_info",
sinfo->flags, num_bytes, 1);
}
if (block_rsv->reserved >= block_rsv->size) {
if (block_rsv->reserved < block_rsv->size) {
num_bytes = sinfo->bytes_used + sinfo->bytes_pinned +
sinfo->bytes_reserved + sinfo->bytes_readonly +
sinfo->bytes_may_use;
if (sinfo->total_bytes > num_bytes) {
num_bytes = sinfo->total_bytes - num_bytes;
num_bytes = min(num_bytes,
block_rsv->size - block_rsv->reserved);
block_rsv->reserved += num_bytes;
sinfo->bytes_may_use += num_bytes;
trace_btrfs_space_reservation(fs_info, "space_info",
sinfo->flags, num_bytes,
1);
}
} else if (block_rsv->reserved > block_rsv->size) {
num_bytes = block_rsv->reserved - block_rsv->size;
sinfo->bytes_may_use -= num_bytes;
trace_btrfs_space_reservation(fs_info, "space_info",
sinfo->flags, num_bytes, 0);
block_rsv->reserved = block_rsv->size;
block_rsv->full = 1;
}
if (block_rsv->reserved == block_rsv->size)
block_rsv->full = 1;
else
block_rsv->full = 0;
spin_unlock(&block_rsv->lock);
spin_unlock(&sinfo->lock);
}
@ -5752,7 +5758,7 @@ out_fail:
/*
* This is tricky, but first we need to figure out how much we
* free'd from any free-ers that occured during this
* free'd from any free-ers that occurred during this
* reservation, so we reset ->csum_bytes to the csum_bytes
* before we dropped our lock, and then call the free for the
* number of bytes that were freed while we were trying our
@ -7018,7 +7024,7 @@ btrfs_lock_cluster(struct btrfs_block_group_cache *block_group,
struct btrfs_free_cluster *cluster,
int delalloc)
{
struct btrfs_block_group_cache *used_bg;
struct btrfs_block_group_cache *used_bg = NULL;
bool locked = false;
again:
spin_lock(&cluster->refill_lock);

40
fs/btrfs/extent_io.c
View File

@ -206,10 +206,8 @@ void extent_io_exit(void)
* destroy caches.
*/
rcu_barrier();
if (extent_state_cache)
kmem_cache_destroy(extent_state_cache);
if (extent_buffer_cache)
kmem_cache_destroy(extent_buffer_cache);
kmem_cache_destroy(extent_state_cache);
kmem_cache_destroy(extent_buffer_cache);
if (btrfs_bioset)
bioset_free(btrfs_bioset);
}
@ -232,7 +230,7 @@ static struct extent_state *alloc_extent_state(gfp_t mask)
if (!state)
return state;
state->state = 0;
state->private = 0;
state->failrec = NULL;
RB_CLEAR_NODE(&state->rb_node);
btrfs_leak_debug_add(&state->leak_list, &states);
atomic_set(&state->refs, 1);
@ -1844,7 +1842,8 @@ out:
* set the private field for a given byte offset in the tree. If there isn't
* an extent_state there already, this does nothing.
*/
static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private)
static noinline int set_state_failrec(struct extent_io_tree *tree, u64 start,
struct io_failure_record *failrec)
{
struct rb_node *node;
struct extent_state *state;
@ -1865,13 +1864,14 @@ static int set_state_private(struct extent_io_tree *tree, u64 start, u64 private
ret = -ENOENT;
goto out;
}
state->private = private;
state->failrec = failrec;
out:
spin_unlock(&tree->lock);
return ret;
}
int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private)
static noinline int get_state_failrec(struct extent_io_tree *tree, u64 start,
struct io_failure_record **failrec)
{
struct rb_node *node;
struct extent_state *state;
@ -1892,7 +1892,7 @@ int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private)
ret = -ENOENT;
goto out;
}
*private = state->private;
*failrec = state->failrec;
out:
spin_unlock(&tree->lock);
return ret;
@ -1972,7 +1972,7 @@ int free_io_failure(struct inode *inode, struct io_failure_record *rec)
int err = 0;
struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
set_state_private(failure_tree, rec->start, 0);
set_state_failrec(failure_tree, rec->start, NULL);
ret = clear_extent_bits(failure_tree, rec->start,
rec->start + rec->len - 1,
EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
@ -2089,7 +2089,6 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
unsigned int pg_offset)
{
u64 private;
u64 private_failure;
struct io_failure_record *failrec;
struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
struct extent_state *state;
@ -2102,12 +2101,11 @@ int clean_io_failure(struct inode *inode, u64 start, struct page *page,
if (!ret)
return 0;
ret = get_state_private(&BTRFS_I(inode)->io_failure_tree, start,
&private_failure);
ret = get_state_failrec(&BTRFS_I(inode)->io_failure_tree, start,
&failrec);
if (ret)
return 0;
failrec = (struct io_failure_record *)(unsigned long) private_failure;
BUG_ON(!failrec->this_mirror);
if (failrec->in_validation) {
@ -2167,7 +2165,7 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
next = next_state(state);
failrec = (struct io_failure_record *)(unsigned long)state->private;
failrec = state->failrec;
free_extent_state(state);
kfree(failrec);
@ -2177,10 +2175,9 @@ void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end)
}
int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
struct io_failure_record **failrec_ret)
struct io_failure_record **failrec_ret)
{
struct io_failure_record *failrec;
u64 private;
struct extent_map *em;
struct extent_io_tree *failure_tree = &BTRFS_I(inode)->io_failure_tree;
struct extent_io_tree *tree = &BTRFS_I(inode)->io_tree;
@ -2188,7 +2185,7 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
int ret;
u64 logical;
ret = get_state_private(failure_tree, start, &private);
ret = get_state_failrec(failure_tree, start, &failrec);
if (ret) {
failrec = kzalloc(sizeof(*failrec), GFP_NOFS);
if (!failrec)
@ -2237,8 +2234,7 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
ret = set_extent_bits(failure_tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY, GFP_NOFS);
if (ret >= 0)
ret = set_state_private(failure_tree, start,
(u64)(unsigned long)failrec);
ret = set_state_failrec(failure_tree, start, failrec);
/* set the bits in the inode's tree */
if (ret >= 0)
ret = set_extent_bits(tree, start, end, EXTENT_DAMAGED,
@ -2248,7 +2244,6 @@ int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
return ret;
}
} else {
failrec = (struct io_failure_record *)(unsigned long)private;
pr_debug("Get IO Failure Record: (found) logical=%llu, start=%llu, len=%llu, validation=%d\n",
failrec->logical, failrec->start, failrec->len,
failrec->in_validation);
@ -3177,7 +3172,8 @@ static int __extent_read_full_page(struct extent_io_tree *tree,
while (1) {
lock_extent(tree, start, end);
ordered = btrfs_lookup_ordered_extent(inode, start);
ordered = btrfs_lookup_ordered_range(inode, start,
PAGE_CACHE_SIZE);
if (!ordered)
break;
unlock_extent(tree, start, end);

5
fs/btrfs/extent_io.h
View File

@ -61,6 +61,7 @@
struct extent_state;
struct btrfs_root;
struct btrfs_io_bio;
struct io_failure_record;
typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw,
struct bio *bio, int mirror_num,
@ -111,8 +112,7 @@ struct extent_state {
atomic_t refs;
unsigned state;
/* for use by the FS */
u64 private;
struct io_failure_record *failrec;
#ifdef CONFIG_BTRFS_DEBUG
struct list_head leak_list;
@ -342,7 +342,6 @@ int extent_readpages(struct extent_io_tree *tree,
get_extent_t get_extent);
int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len, get_extent_t *get_extent);
int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private);
void set_page_extent_mapped(struct page *page);
struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,

8
fs/btrfs/extent_map.c
View File

@ -4,6 +4,7 @@
#include <linux/hardirq.h>
#include "ctree.h"
#include "extent_map.h"
#include "compression.h"
static struct kmem_cache *extent_map_cache;
@ -20,8 +21,7 @@ int __init extent_map_init(void)
void extent_map_exit(void)
{
if (extent_map_cache)
kmem_cache_destroy(extent_map_cache);
kmem_cache_destroy(extent_map_cache);
}
/**
@ -62,7 +62,7 @@ struct extent_map *alloc_extent_map(void)
/**
* free_extent_map - drop reference count of an extent_map
* @em: extent map beeing releasead
* @em: extent map being releasead
*
* Drops the reference out on @em by one and free the structure
* if the reference count hits zero.
@ -422,7 +422,7 @@ struct extent_map *search_extent_mapping(struct extent_map_tree *tree,
/**
* remove_extent_mapping - removes an extent_map from the extent tree
* @tree: extent tree to remove from
* @em: extent map beeing removed
* @em: extent map being removed
*
* Removes @em from @tree. No reference counts are dropped, and no checks
* are done to see if the range is in use

103
fs/btrfs/file-item.c
View File

@ -25,6 +25,7 @@
#include "transaction.h"
#include "volumes.h"
#include "print-tree.h"
#include "compression.h"
#define __MAX_CSUM_ITEMS(r, size) ((unsigned long)(((BTRFS_LEAF_DATA_SIZE(r) - \
sizeof(struct btrfs_item) * 2) / \
@ -172,6 +173,7 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
u64 item_start_offset = 0;
u64 item_last_offset = 0;
u64 disk_bytenr;
u64 page_bytes_left;
u32 diff;
int nblocks;
int bio_index = 0;
@ -220,6 +222,8 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
disk_bytenr = (u64)bio->bi_iter.bi_sector << 9;
if (dio)
offset = logical_offset;
page_bytes_left = bvec->bv_len;
while (bio_index < bio->bi_vcnt) {
if (!dio)
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
@ -243,7 +247,7 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
if (BTRFS_I(inode)->root->root_key.objectid ==
BTRFS_DATA_RELOC_TREE_OBJECTID) {
set_extent_bits(io_tree, offset,
offset + bvec->bv_len - 1,
offset + root->sectorsize - 1,
EXTENT_NODATASUM, GFP_NOFS);
} else {
btrfs_info(BTRFS_I(inode)->root->fs_info,
@ -281,13 +285,29 @@ static int __btrfs_lookup_bio_sums(struct btrfs_root *root,
found:
csum += count * csum_size;
nblocks -= count;
bio_index += count;
while (count--) {
disk_bytenr += bvec->bv_len;
offset += bvec->bv_len;
bvec++;
disk_bytenr += root->sectorsize;
offset += root->sectorsize;
page_bytes_left -= root->sectorsize;
if (!page_bytes_left) {
bio_index++;
/*
* make sure we're still inside the
* bio before we update page_bytes_left
*/
if (bio_index >= bio->bi_vcnt) {
WARN_ON_ONCE(count);
goto done;
}
bvec++;
page_bytes_left = bvec->bv_len;
}
}
}
done:
btrfs_free_path(path);
return 0;
}
@ -432,6 +452,8 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
struct bio_vec *bvec = bio->bi_io_vec;
int bio_index = 0;
int index;
int nr_sectors;
int i;
unsigned long total_bytes = 0;
unsigned long this_sum_bytes = 0;
u64 offset;
@ -459,41 +481,56 @@ int btrfs_csum_one_bio(struct btrfs_root *root, struct inode *inode,
if (!contig)
offset = page_offset(bvec->bv_page) + bvec->bv_offset;
if (offset >= ordered->file_offset + ordered->len ||
offset < ordered->file_offset) {
unsigned long bytes_left;
sums->len = this_sum_bytes;
this_sum_bytes = 0;
btrfs_add_ordered_sum(inode, ordered, sums);
btrfs_put_ordered_extent(ordered);
data = kmap_atomic(bvec->bv_page);
bytes_left = bio->bi_iter.bi_size - total_bytes;
nr_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info,
bvec->bv_len + root->sectorsize
- 1);
sums = kzalloc(btrfs_ordered_sum_size(root, bytes_left),
GFP_NOFS);
BUG_ON(!sums); /* -ENOMEM */
sums->len = bytes_left;
ordered = btrfs_lookup_ordered_extent(inode, offset);
BUG_ON(!ordered); /* Logic error */
sums->bytenr = ((u64)bio->bi_iter.bi_sector << 9) +
total_bytes;
index = 0;
for (i = 0; i < nr_sectors; i++) {
if (offset >= ordered->file_offset + ordered->len ||
offset < ordered->file_offset) {
unsigned long bytes_left;
kunmap_atomic(data);
sums->len = this_sum_bytes;
this_sum_bytes = 0;
btrfs_add_ordered_sum(inode, ordered, sums);
btrfs_put_ordered_extent(ordered);
bytes_left = bio->bi_iter.bi_size - total_bytes;
sums = kzalloc(btrfs_ordered_sum_size(root, bytes_left),
GFP_NOFS);
BUG_ON(!sums); /* -ENOMEM */
sums->len = bytes_left;
ordered = btrfs_lookup_ordered_extent(inode,
offset);
ASSERT(ordered); /* Logic error */
sums->bytenr = ((u64)bio->bi_iter.bi_sector << 9)
+ total_bytes;
index = 0;
data = kmap_atomic(bvec->bv_page);
}
sums->sums[index] = ~(u32)0;
sums->sums[index]
= btrfs_csum_data(data + bvec->bv_offset
+ (i * root->sectorsize),
sums->sums[index],
root->sectorsize);
btrfs_csum_final(sums->sums[index],
(char *)(sums->sums + index));
index++;
offset += root->sectorsize;
this_sum_bytes += root->sectorsize;
total_bytes += root->sectorsize;
}
data = kmap_atomic(bvec->bv_page);
sums->sums[index] = ~(u32)0;
sums->sums[index] = btrfs_csum_data(data + bvec->bv_offset,
sums->sums[index],
bvec->bv_len);
kunmap_atomic(data);
btrfs_csum_final(sums->sums[index],
(char *)(sums->sums + index));
bio_index++;
index++;
total_bytes += bvec->bv_len;
this_sum_bytes += bvec->bv_len;
offset += bvec->bv_len;
bvec++;
}
this_sum_bytes = 0;

158
fs/btrfs/file.c
View File

@ -41,6 +41,7 @@
#include "locking.h"
#include "volumes.h"
#include "qgroup.h"
#include "compression.h"
static struct kmem_cache *btrfs_inode_defrag_cachep;
/*
@ -498,7 +499,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
loff_t isize = i_size_read(inode);
start_pos = pos & ~((u64)root->sectorsize - 1);
num_bytes = ALIGN(write_bytes + pos - start_pos, root->sectorsize);
num_bytes = round_up(write_bytes + pos - start_pos, root->sectorsize);
end_of_last_block = start_pos + num_bytes - 1;
err = btrfs_set_extent_delalloc(inode, start_pos, end_of_last_block,
@ -1379,16 +1380,19 @@ fail:
static noinline int
lock_and_cleanup_extent_if_need(struct inode *inode, struct page **pages,
size_t num_pages, loff_t pos,
size_t write_bytes,
u64 *lockstart, u64 *lockend,
struct extent_state **cached_state)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 start_pos;
u64 last_pos;
int i;
int ret = 0;
start_pos = pos & ~((u64)PAGE_CACHE_SIZE - 1);
last_pos = start_pos + ((u64)num_pages << PAGE_CACHE_SHIFT) - 1;
start_pos = round_down(pos, root->sectorsize);
last_pos = start_pos
+ round_up(pos + write_bytes - start_pos, root->sectorsize) - 1;
if (start_pos < inode->i_size) {
struct btrfs_ordered_extent *ordered;
@ -1503,6 +1507,7 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
while (iov_iter_count(i) > 0) {
size_t offset = pos & (PAGE_CACHE_SIZE - 1);
size_t sector_offset;
size_t write_bytes = min(iov_iter_count(i),
nrptrs * (size_t)PAGE_CACHE_SIZE -
offset);
@ -1511,6 +1516,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
size_t reserve_bytes;
size_t dirty_pages;
size_t copied;
size_t dirty_sectors;
size_t num_sectors;
WARN_ON(num_pages > nrptrs);
@ -1523,29 +1530,29 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file,
break;
}
reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
sector_offset = pos & (root->sectorsize - 1);
reserve_bytes = round_up(write_bytes + sector_offset,
root->sectorsize);
if (BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
BTRFS_INODE_PREALLOC)) {
ret = check_can_nocow(inode, pos, &write_bytes);
if (ret < 0)
break;
if (ret > 0) {
/*
* For nodata cow case, no need to reserve
* data space.
*/
only_release_metadata = true;
/*
* our prealloc extent may be smaller than
* write_bytes, so scale down.
*/
num_pages = DIV_ROUND_UP(write_bytes + offset,
PAGE_CACHE_SIZE);
reserve_bytes = num_pages << PAGE_CACHE_SHIFT;
goto reserve_metadata;
}
if ((BTRFS_I(inode)->flags & (BTRFS_INODE_NODATACOW |
BTRFS_INODE_PREALLOC)) &&
check_can_nocow(inode, pos, &write_bytes) > 0) {
/*
* For nodata cow case, no need to reserve
* data space.
*/
only_release_metadata = true;
/*
* our prealloc extent may be smaller than
* write_bytes, so scale down.
*/
num_pages = DIV_ROUND_UP(write_bytes + offset,
PAGE_CACHE_SIZE);
reserve_bytes = round_up(write_bytes + sector_offset,
root->sectorsize);
goto reserve_metadata;
}
ret = btrfs_check_data_free_space(inode, pos, write_bytes);
if (ret < 0)
break;
@ -1576,8 +1583,8 @@ again:
break;
ret = lock_and_cleanup_extent_if_need(inode, pages, num_pages,
pos, &lockstart, &lockend,
&cached_state);
pos, write_bytes, &lockstart,
&lockend, &cached_state);
if (ret < 0) {
if (ret == -EAGAIN)
goto again;
@ -1612,9 +1619,16 @@ again:
* we still have an outstanding extent for the chunk we actually
* managed to copy.
*/
if (num_pages > dirty_pages) {
release_bytes = (num_pages - dirty_pages) <<
PAGE_CACHE_SHIFT;
num_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info,
reserve_bytes);
dirty_sectors = round_up(copied + sector_offset,
root->sectorsize);
dirty_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info,
dirty_sectors);
if (num_sectors > dirty_sectors) {
release_bytes = (write_bytes - copied)
& ~((u64)root->sectorsize - 1);
if (copied > 0) {
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->outstanding_extents++;
@ -1633,7 +1647,8 @@ again:
}
}
release_bytes = dirty_pages << PAGE_CACHE_SHIFT;
release_bytes = round_up(copied + sector_offset,
root->sectorsize);
if (copied > 0)
ret = btrfs_dirty_pages(root, inode, pages,
@ -1654,8 +1669,7 @@ again:
if (only_release_metadata && copied > 0) {
lockstart = round_down(pos, root->sectorsize);
lockend = lockstart +
(dirty_pages << PAGE_CACHE_SHIFT) - 1;
lockend = round_up(pos + copied, root->sectorsize) - 1;
set_extent_bit(&BTRFS_I(inode)->io_tree, lockstart,
lockend, EXTENT_NORESERVE, NULL,
@ -1761,6 +1775,8 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
ssize_t err;
loff_t pos;
size_t count;
loff_t oldsize;
int clean_page = 0;
inode_lock(inode);
err = generic_write_checks(iocb, from);
@ -1799,14 +1815,17 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
pos = iocb->ki_pos;
count = iov_iter_count(from);
start_pos = round_down(pos, root->sectorsize);
if (start_pos > i_size_read(inode)) {
oldsize = i_size_read(inode);
if (start_pos > oldsize) {
/* Expand hole size to cover write data, preventing empty gap */
end_pos = round_up(pos + count, root->sectorsize);
err = btrfs_cont_expand(inode, i_size_read(inode), end_pos);
err = btrfs_cont_expand(inode, oldsize, end_pos);
if (err) {
inode_unlock(inode);
goto out;
}
if (start_pos > round_up(oldsize, root->sectorsize))
clean_page = 1;
}
if (sync)
@ -1818,6 +1837,9 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
num_written = __btrfs_buffered_write(file, from, pos);
if (num_written > 0)
iocb->ki_pos = pos + num_written;
if (clean_page)
pagecache_isize_extended(inode, oldsize,
i_size_read(inode));
}
inode_unlock(inode);
@ -1825,7 +1847,7 @@ static ssize_t btrfs_file_write_iter(struct kiocb *iocb,
/*
* We also have to set last_sub_trans to the current log transid,
* otherwise subsequent syncs to a file that's been synced in this
* transaction will appear to have already occured.
* transaction will appear to have already occurred.
*/
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->last_sub_trans = root->log_transid;
@ -1996,10 +2018,11 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
*/
smp_mb();
if (btrfs_inode_in_log(inode, root->fs_info->generation) ||
(BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed &&
(full_sync ||
!btrfs_have_ordered_extents_in_range(inode, start, len)))) {
(full_sync && BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) ||
(!btrfs_have_ordered_extents_in_range(inode, start, len) &&
BTRFS_I(inode)->last_trans
<= root->fs_info->last_trans_committed)) {
/*
* We'v had everything committed since the last time we were
* modified so clear this flag in case it was set for whatever
@ -2293,10 +2316,10 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
int ret = 0;
int err = 0;
unsigned int rsv_count;
bool same_page;
bool same_block;
bool no_holes = btrfs_fs_incompat(root->fs_info, NO_HOLES);
u64 ino_size;
bool truncated_page = false;
bool truncated_block = false;
bool updated_inode = false;
ret = btrfs_wait_ordered_range(inode, offset, len);
@ -2304,7 +2327,7 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
return ret;
inode_lock(inode);
ino_size = round_up(inode->i_size, PAGE_CACHE_SIZE);
ino_size = round_up(inode->i_size, root->sectorsize);
ret = find_first_non_hole(inode, &offset, &len);
if (ret < 0)
goto out_only_mutex;
@ -2317,31 +2340,30 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
lockstart = round_up(offset, BTRFS_I(inode)->root->sectorsize);
lockend = round_down(offset + len,
BTRFS_I(inode)->root->sectorsize) - 1;
same_page = ((offset >> PAGE_CACHE_SHIFT) ==
((offset + len - 1) >> PAGE_CACHE_SHIFT));
same_block = (BTRFS_BYTES_TO_BLKS(root->fs_info, offset))
== (BTRFS_BYTES_TO_BLKS(root->fs_info, offset + len - 1));
/*
* We needn't truncate any page which is beyond the end of the file
* We needn't truncate any block which is beyond the end of the file
* because we are sure there is no data there.
*/
/*
* Only do this if we are in the same page and we aren't doing the
* entire page.
* Only do this if we are in the same block and we aren't doing the
* entire block.
*/
if (same_page && len < PAGE_CACHE_SIZE) {
if (same_block && len < root->sectorsize) {
if (offset < ino_size) {
truncated_page = true;
ret = btrfs_truncate_page(inode, offset, len, 0);
truncated_block = true;
ret = btrfs_truncate_block(inode, offset, len, 0);
} else {
ret = 0;
}
goto out_only_mutex;
}
/* zero back part of the first page */
/* zero back part of the first block */
if (offset < ino_size) {
truncated_page = true;
ret = btrfs_truncate_page(inode, offset, 0, 0);
truncated_block = true;
ret = btrfs_truncate_block(inode, offset, 0, 0);
if (ret) {
inode_unlock(inode);
return ret;
@ -2376,9 +2398,10 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
if (!ret) {
/* zero the front end of the last page */
if (tail_start + tail_len < ino_size) {
truncated_page = true;
ret = btrfs_truncate_page(inode,
tail_start + tail_len, 0, 1);
truncated_block = true;
ret = btrfs_truncate_block(inode,
tail_start + tail_len,
0, 1);
if (ret)
goto out_only_mutex;
}
@ -2544,7 +2567,7 @@ out_trans:
goto out_free;
inode_inc_iversion(inode);
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
@ -2558,7 +2581,7 @@ out:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, lockstart, lockend,
&cached_state, GFP_NOFS);
out_only_mutex:
if (!updated_inode && truncated_page && !ret && !err) {
if (!updated_inode && truncated_block && !ret && !err) {
/*
* If we only end up zeroing part of a page, we still need to
* update the inode item, so that all the time fields are
@ -2611,7 +2634,7 @@ static int add_falloc_range(struct list_head *head, u64 start, u64 len)
return 0;
}
insert:
range = kmalloc(sizeof(*range), GFP_NOFS);
range = kmalloc(sizeof(*range), GFP_KERNEL);
if (!range)
return -ENOMEM;
range->start = start;
@ -2678,10 +2701,10 @@ static long btrfs_fallocate(struct file *file, int mode,
} else if (offset + len > inode->i_size) {
/*
* If we are fallocating from the end of the file onward we
* need to zero out the end of the page if i_size lands in the
* middle of a page.
* need to zero out the end of the block if i_size lands in the
* middle of a block.
*/
ret = btrfs_truncate_page(inode, inode->i_size, 0, 0);
ret = btrfs_truncate_block(inode, inode->i_size, 0, 0);
if (ret)
goto out;
}
@ -2712,7 +2735,7 @@ static long btrfs_fallocate(struct file *file, int mode,
btrfs_put_ordered_extent(ordered);
unlock_extent_cached(&BTRFS_I(inode)->io_tree,
alloc_start, locked_end,
&cached_state, GFP_NOFS);
&cached_state, GFP_KERNEL);
/*
* we can't wait on the range with the transaction
* running or with the extent lock held
@ -2794,7 +2817,7 @@ static long btrfs_fallocate(struct file *file, int mode,
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
} else {
inode->i_ctime = CURRENT_TIME;
inode->i_ctime = current_fs_time(inode->i_sb);
i_size_write(inode, actual_end);
btrfs_ordered_update_i_size(inode, actual_end, NULL);
ret = btrfs_update_inode(trans, root, inode);
@ -2806,7 +2829,7 @@ static long btrfs_fallocate(struct file *file, int mode,
}
out_unlock:
unlock_extent_cached(&BTRFS_I(inode)->io_tree, alloc_start, locked_end,
&cached_state, GFP_NOFS);
&cached_state, GFP_KERNEL);
out:
/*
* As we waited the extent range, the data_rsv_map must be empty
@ -2939,8 +2962,7 @@ const struct file_operations btrfs_file_operations = {
void btrfs_auto_defrag_exit(void)
{
if (btrfs_inode_defrag_cachep)
kmem_cache_destroy(btrfs_inode_defrag_cachep);
kmem_cache_destroy(btrfs_inode_defrag_cachep);
}
int btrfs_auto_defrag_init(void)

3
fs/btrfs/inode-map.c
View File

@ -556,6 +556,9 @@ int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid)
mutex_lock(&root->objectid_mutex);
if (unlikely(root->highest_objectid >= BTRFS_LAST_FREE_OBJECTID)) {
btrfs_warn(root->fs_info,
"the objectid of root %llu reaches its highest value",
root->root_key.objectid);
ret = -ENOSPC;
goto out;
}

326
fs/btrfs/inode.c
View File

@ -263,7 +263,7 @@ static noinline int cow_file_range_inline(struct btrfs_root *root,
data_len = compressed_size;
if (start > 0 ||
actual_end > PAGE_CACHE_SIZE ||
actual_end > root->sectorsize ||
data_len > BTRFS_MAX_INLINE_DATA_SIZE(root) ||
(!compressed_size &&
(actual_end & (root->sectorsize - 1)) == 0) ||
@ -2002,7 +2002,8 @@ again:
if (PagePrivate2(page))
goto out;
ordered = btrfs_lookup_ordered_extent(inode, page_start);
ordered = btrfs_lookup_ordered_range(inode, page_start,
PAGE_CACHE_SIZE);
if (ordered) {
unlock_extent_cached(&BTRFS_I(inode)->io_tree, page_start,
page_end, &cached_state, GFP_NOFS);
@ -4013,7 +4014,8 @@ err:
btrfs_i_size_write(dir, dir->i_size - name_len * 2);
inode_inc_iversion(inode);
inode_inc_iversion(dir);
inode->i_ctime = dir->i_mtime = dir->i_ctime = CURRENT_TIME;
inode->i_ctime = dir->i_mtime =
dir->i_ctime = current_fs_time(inode->i_sb);
ret = btrfs_update_inode(trans, root, dir);
out:
return ret;
@ -4156,7 +4158,7 @@ int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
btrfs_i_size_write(dir, dir->i_size - name_len * 2);
inode_inc_iversion(dir);
dir->i_mtime = dir->i_ctime = CURRENT_TIME;
dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
ret = btrfs_update_inode_fallback(trans, root, dir);
if (ret)
btrfs_abort_transaction(trans, root, ret);
@ -4211,11 +4213,20 @@ static int truncate_space_check(struct btrfs_trans_handle *trans,
{
int ret;
/*
* This is only used to apply pressure to the enospc system, we don't
* intend to use this reservation at all.
*/
bytes_deleted = btrfs_csum_bytes_to_leaves(root, bytes_deleted);
bytes_deleted *= root->nodesize;
ret = btrfs_block_rsv_add(root, &root->fs_info->trans_block_rsv,
bytes_deleted, BTRFS_RESERVE_NO_FLUSH);
if (!ret)
if (!ret) {
trace_btrfs_space_reservation(root->fs_info, "transaction",
trans->transid,
bytes_deleted, 1);
trans->bytes_reserved += bytes_deleted;
}
return ret;
}
@ -4248,7 +4259,8 @@ static int truncate_inline_extent(struct inode *inode,
* read the extent item from disk (data not in the page cache).
*/
btrfs_release_path(path);
return btrfs_truncate_page(inode, offset, page_end - offset, 0);
return btrfs_truncate_block(inode, offset, page_end - offset,
0);
}
btrfs_set_file_extent_ram_bytes(leaf, fi, size);
@ -4601,17 +4613,17 @@ error:
}
/*
* btrfs_truncate_page - read, zero a chunk and write a page
* btrfs_truncate_block - read, zero a chunk and write a block
* @inode - inode that we're zeroing
* @from - the offset to start zeroing
* @len - the length to zero, 0 to zero the entire range respective to the
* offset
* @front - zero up to the offset instead of from the offset on
*
* This will find the page for the "from" offset and cow the page and zero the
* This will find the block for the "from" offset and cow the block and zero the
* part we want to zero. This is used with truncate and hole punching.
*/
int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
int btrfs_truncate_block(struct inode *inode, loff_t from, loff_t len,
int front)
{
struct address_space *mapping = inode->i_mapping;
@ -4622,18 +4634,19 @@ int btrfs_truncate_page(struct inode *inode, loff_t from, loff_t len,
char *kaddr;
u32 blocksize = root->sectorsize;
pgoff_t index = from >> PAGE_CACHE_SHIFT;
unsigned offset = from & (PAGE_CACHE_SIZE-1);
unsigned offset = from & (blocksize - 1);
struct page *page;
gfp_t mask = btrfs_alloc_write_mask(mapping);
int ret = 0;
u64 page_start;
u64 page_end;
u64 block_start;
u64 block_end;
if ((offset & (blocksize - 1)) == 0 &&
(!len || ((len & (blocksize - 1)) == 0)))
goto out;
ret = btrfs_delalloc_reserve_space(inode,
round_down(from, PAGE_CACHE_SIZE), PAGE_CACHE_SIZE);
round_down(from, blocksize), blocksize);
if (ret)
goto out;
@ -4641,14 +4654,14 @@ again:
page = find_or_create_page(mapping, index, mask);
if (!page) {
btrfs_delalloc_release_space(inode,
round_down(from, PAGE_CACHE_SIZE),
PAGE_CACHE_SIZE);
round_down(from, blocksize),
blocksize);
ret = -ENOMEM;
goto out;
}
page_start = page_offset(page);
page_end = page_start + PAGE_CACHE_SIZE - 1;
block_start = round_down(from, blocksize);
block_end = block_start + blocksize - 1;
if (!PageUptodate(page)) {
ret = btrfs_readpage(NULL, page);
@ -4665,12 +4678,12 @@ again:
}
wait_on_page_writeback(page);
lock_extent_bits(io_tree, page_start, page_end, &cached_state);
lock_extent_bits(io_tree, block_start, block_end, &cached_state);
set_page_extent_mapped(page);
ordered = btrfs_lookup_ordered_extent(inode, page_start);
ordered = btrfs_lookup_ordered_extent(inode, block_start);
if (ordered) {
unlock_extent_cached(io_tree, page_start, page_end,
unlock_extent_cached(io_tree, block_start, block_end,
&cached_state, GFP_NOFS);
unlock_page(page);
page_cache_release(page);
@ -4679,39 +4692,41 @@ again:
goto again;
}
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end,
clear_extent_bit(&BTRFS_I(inode)->io_tree, block_start, block_end,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state, GFP_NOFS);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
ret = btrfs_set_extent_delalloc(inode, block_start, block_end,
&cached_state);
if (ret) {
unlock_extent_cached(io_tree, page_start, page_end,
unlock_extent_cached(io_tree, block_start, block_end,
&cached_state, GFP_NOFS);
goto out_unlock;
}
if (offset != PAGE_CACHE_SIZE) {
if (offset != blocksize) {
if (!len)
len = PAGE_CACHE_SIZE - offset;
len = blocksize - offset;
kaddr = kmap(page);
if (front)
memset(kaddr, 0, offset);
memset(kaddr + (block_start - page_offset(page)),
0, offset);
else
memset(kaddr + offset, 0, len);
memset(kaddr + (block_start - page_offset(page)) + offset,
0, len);
flush_dcache_page(page);
kunmap(page);
}
ClearPageChecked(page);
set_page_dirty(page);
unlock_extent_cached(io_tree, page_start, page_end, &cached_state,
unlock_extent_cached(io_tree, block_start, block_end, &cached_state,
GFP_NOFS);
out_unlock:
if (ret)
btrfs_delalloc_release_space(inode, page_start,
PAGE_CACHE_SIZE);
btrfs_delalloc_release_space(inode, block_start,
blocksize);
unlock_page(page);
page_cache_release(page);
out:
@ -4782,11 +4797,11 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
int err = 0;
/*
* If our size started in the middle of a page we need to zero out the
* rest of the page before we expand the i_size, otherwise we could
* If our size started in the middle of a block we need to zero out the
* rest of the block before we expand the i_size, otherwise we could
* expose stale data.
*/
err = btrfs_truncate_page(inode, oldsize, 0, 0);
err = btrfs_truncate_block(inode, oldsize, 0, 0);
if (err)
return err;
@ -4895,7 +4910,6 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr)
}
if (newsize > oldsize) {
truncate_pagecache(inode, newsize);
/*
* Don't do an expanding truncate while snapshoting is ongoing.
* This is to ensure the snapshot captures a fully consistent
@ -4918,6 +4932,7 @@ static int btrfs_setsize(struct inode *inode, struct iattr *attr)
i_size_write(inode, newsize);
btrfs_ordered_update_i_size(inode, i_size_read(inode), NULL);
pagecache_isize_extended(inode, oldsize, newsize);
ret = btrfs_update_inode(trans, root, inode);
btrfs_end_write_no_snapshoting(root);
btrfs_end_transaction(trans, root);
@ -5588,7 +5603,7 @@ static struct inode *new_simple_dir(struct super_block *s,
inode->i_op = &btrfs_dir_ro_inode_operations;
inode->i_fop = &simple_dir_operations;
inode->i_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO;
inode->i_mtime = CURRENT_TIME;
inode->i_mtime = current_fs_time(inode->i_sb);
inode->i_atime = inode->i_mtime;
inode->i_ctime = inode->i_mtime;
BTRFS_I(inode)->i_otime = inode->i_mtime;
@ -5790,7 +5805,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
if (name_len <= sizeof(tmp_name)) {
name_ptr = tmp_name;
} else {
name_ptr = kmalloc(name_len, GFP_NOFS);
name_ptr = kmalloc(name_len, GFP_KERNEL);
if (!name_ptr) {
ret = -ENOMEM;
goto err;
@ -6172,7 +6187,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
inode_init_owner(inode, dir, mode);
inode_set_bytes(inode, 0);
inode->i_mtime = CURRENT_TIME;
inode->i_mtime = current_fs_time(inode->i_sb);
inode->i_atime = inode->i_mtime;
inode->i_ctime = inode->i_mtime;
BTRFS_I(inode)->i_otime = inode->i_mtime;
@ -6285,7 +6300,8 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
btrfs_i_size_write(parent_inode, parent_inode->i_size +
name_len * 2);
inode_inc_iversion(parent_inode);
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
parent_inode->i_mtime = parent_inode->i_ctime =
current_fs_time(parent_inode->i_sb);
ret = btrfs_update_inode(trans, root, parent_inode);
if (ret)
btrfs_abort_transaction(trans, root, ret);
@ -6503,7 +6519,7 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
BTRFS_I(inode)->dir_index = 0ULL;
inc_nlink(inode);
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
inode->i_ctime = current_fs_time(inode->i_sb);
ihold(inode);
set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
@ -7414,7 +7430,26 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
cached_state, GFP_NOFS);
if (ordered) {
btrfs_start_ordered_extent(inode, ordered, 1);
/*
* If we are doing a DIO read and the ordered extent we
* found is for a buffered write, we can not wait for it
* to complete and retry, because if we do so we can
* deadlock with concurrent buffered writes on page
* locks. This happens only if our DIO read covers more
* than one extent map, if at this point has already
* created an ordered extent for a previous extent map
* and locked its range in the inode's io tree, and a
* concurrent write against that previous extent map's
* range and this range started (we unlock the ranges
* in the io tree only when the bios complete and
* buffered writes always lock pages before attempting
* to lock range in the io tree).
*/
if (writing ||
test_bit(BTRFS_ORDERED_DIRECT, &ordered->flags))
btrfs_start_ordered_extent(inode, ordered, 1);
else
ret = -ENOTBLK;
btrfs_put_ordered_extent(ordered);
} else {
/*
@ -7431,9 +7466,11 @@ static int lock_extent_direct(struct inode *inode, u64 lockstart, u64 lockend,
* that page.
*/
ret = -ENOTBLK;
break;
}
if (ret)
break;
cond_resched();
}
@ -7764,9 +7801,9 @@ static int btrfs_check_dio_repairable(struct inode *inode,
}
static int dio_read_error(struct inode *inode, struct bio *failed_bio,
struct page *page, u64 start, u64 end,
int failed_mirror, bio_end_io_t *repair_endio,
void *repair_arg)
struct page *page, unsigned int pgoff,
u64 start, u64 end, int failed_mirror,
bio_end_io_t *repair_endio, void *repair_arg)
{
struct io_failure_record *failrec;
struct bio *bio;
@ -7787,7 +7824,9 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
return -EIO;
}
if (failed_bio->bi_vcnt > 1)
if ((failed_bio->bi_vcnt > 1)
|| (failed_bio->bi_io_vec->bv_len
> BTRFS_I(inode)->root->sectorsize))
read_mode = READ_SYNC | REQ_FAILFAST_DEV;
else
read_mode = READ_SYNC;
@ -7795,7 +7834,7 @@ static int dio_read_error(struct inode *inode, struct bio *failed_bio,
isector = start - btrfs_io_bio(failed_bio)->logical;
isector >>= inode->i_sb->s_blocksize_bits;
bio = btrfs_create_repair_bio(inode, failed_bio, failrec, page,
0, isector, repair_endio, repair_arg);
pgoff, isector, repair_endio, repair_arg);
if (!bio) {
free_io_failure(inode, failrec);
return -EIO;
@ -7825,12 +7864,17 @@ struct btrfs_retry_complete {
static void btrfs_retry_endio_nocsum(struct bio *bio)
{
struct btrfs_retry_complete *done = bio->bi_private;
struct inode *inode;
struct bio_vec *bvec;
int i;
if (bio->bi_error)
goto end;
ASSERT(bio->bi_vcnt == 1);
inode = bio->bi_io_vec->bv_page->mapping->host;
ASSERT(bio->bi_io_vec->bv_len == BTRFS_I(inode)->root->sectorsize);
done->uptodate = 1;
bio_for_each_segment_all(bvec, bio, i)
clean_io_failure(done->inode, done->start, bvec->bv_page, 0);
@ -7842,25 +7886,35 @@ end:
static int __btrfs_correct_data_nocsum(struct inode *inode,
struct btrfs_io_bio *io_bio)
{
struct btrfs_fs_info *fs_info;
struct bio_vec *bvec;
struct btrfs_retry_complete done;
u64 start;
unsigned int pgoff;
u32 sectorsize;
int nr_sectors;
int i;
int ret;
fs_info = BTRFS_I(inode)->root->fs_info;
sectorsize = BTRFS_I(inode)->root->sectorsize;
start = io_bio->logical;
done.inode = inode;
bio_for_each_segment_all(bvec, &io_bio->bio, i) {
try_again:
nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info, bvec->bv_len);
pgoff = bvec->bv_offset;
next_block_or_try_again:
done.uptodate = 0;
done.start = start;
init_completion(&done.done);
ret = dio_read_error(inode, &io_bio->bio, bvec->bv_page, start,
start + bvec->bv_len - 1,
io_bio->mirror_num,
btrfs_retry_endio_nocsum, &done);
ret = dio_read_error(inode, &io_bio->bio, bvec->bv_page,
pgoff, start, start + sectorsize - 1,
io_bio->mirror_num,
btrfs_retry_endio_nocsum, &done);
if (ret)
return ret;
@ -7868,10 +7922,15 @@ try_again:
if (!done.uptodate) {
/* We might have another mirror, so try again */
goto try_again;
goto next_block_or_try_again;
}
start += bvec->bv_len;
start += sectorsize;
if (nr_sectors--) {
pgoff += sectorsize;
goto next_block_or_try_again;
}
}
return 0;
@ -7881,7 +7940,9 @@ static void btrfs_retry_endio(struct bio *bio)
{
struct btrfs_retry_complete *done = bio->bi_private;
struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
struct inode *inode;
struct bio_vec *bvec;
u64 start;
int uptodate;
int ret;
int i;
@ -7890,13 +7951,20 @@ static void btrfs_retry_endio(struct bio *bio)
goto end;
uptodate = 1;
start = done->start;
ASSERT(bio->bi_vcnt == 1);
inode = bio->bi_io_vec->bv_page->mapping->host;
ASSERT(bio->bi_io_vec->bv_len == BTRFS_I(inode)->root->sectorsize);
bio_for_each_segment_all(bvec, bio, i) {
ret = __readpage_endio_check(done->inode, io_bio, i,
bvec->bv_page, 0,
done->start, bvec->bv_len);
bvec->bv_page, bvec->bv_offset,
done->start, bvec->bv_len);
if (!ret)
clean_io_failure(done->inode, done->start,
bvec->bv_page, 0);
bvec->bv_page, bvec->bv_offset);
else
uptodate = 0;
}
@ -7910,20 +7978,34 @@ end:
static int __btrfs_subio_endio_read(struct inode *inode,
struct btrfs_io_bio *io_bio, int err)
{
struct btrfs_fs_info *fs_info;
struct bio_vec *bvec;
struct btrfs_retry_complete done;
u64 start;
u64 offset = 0;
u32 sectorsize;
int nr_sectors;
unsigned int pgoff;
int csum_pos;
int i;
int ret;
fs_info = BTRFS_I(inode)->root->fs_info;
sectorsize = BTRFS_I(inode)->root->sectorsize;
err = 0;
start = io_bio->logical;
done.inode = inode;
bio_for_each_segment_all(bvec, &io_bio->bio, i) {
ret = __readpage_endio_check(inode, io_bio, i, bvec->bv_page,
0, start, bvec->bv_len);
nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info, bvec->bv_len);
pgoff = bvec->bv_offset;
next_block:
csum_pos = BTRFS_BYTES_TO_BLKS(fs_info, offset);
ret = __readpage_endio_check(inode, io_bio, csum_pos,
bvec->bv_page, pgoff, start,
sectorsize);
if (likely(!ret))
goto next;
try_again:
@ -7931,10 +8013,10 @@ try_again:
done.start = start;
init_completion(&done.done);
ret = dio_read_error(inode, &io_bio->bio, bvec->bv_page, start,
start + bvec->bv_len - 1,
io_bio->mirror_num,
btrfs_retry_endio, &done);
ret = dio_read_error(inode, &io_bio->bio, bvec->bv_page,
pgoff, start, start + sectorsize - 1,
io_bio->mirror_num,
btrfs_retry_endio, &done);
if (ret) {
err = ret;
goto next;
@ -7947,8 +8029,15 @@ try_again:
goto try_again;
}
next:
offset += bvec->bv_len;
start += bvec->bv_len;
offset += sectorsize;
start += sectorsize;
ASSERT(nr_sectors);
if (--nr_sectors) {
pgoff += sectorsize;
goto next_block;
}
}
return err;
@ -8202,9 +8291,11 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
u64 file_offset = dip->logical_offset;
u64 submit_len = 0;
u64 map_length;
int nr_pages = 0;
int ret;
u32 blocksize = root->sectorsize;
int async_submit = 0;
int nr_sectors;
int ret;
int i;
map_length = orig_bio->bi_iter.bi_size;
ret = btrfs_map_block(root->fs_info, rw, start_sector << 9,
@ -8234,9 +8325,12 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
atomic_inc(&dip->pending_bios);
while (bvec <= (orig_bio->bi_io_vec + orig_bio->bi_vcnt - 1)) {
if (map_length < submit_len + bvec->bv_len ||
bio_add_page(bio, bvec->bv_page, bvec->bv_len,
bvec->bv_offset) < bvec->bv_len) {
nr_sectors = BTRFS_BYTES_TO_BLKS(root->fs_info, bvec->bv_len);
i = 0;
next_block:
if (unlikely(map_length < submit_len + blocksize ||
bio_add_page(bio, bvec->bv_page, blocksize,
bvec->bv_offset + (i * blocksize)) < blocksize)) {
/*
* inc the count before we submit the bio so
* we know the end IO handler won't happen before
@ -8257,7 +8351,6 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
file_offset += submit_len;
submit_len = 0;
nr_pages = 0;
bio = btrfs_dio_bio_alloc(orig_bio->bi_bdev,
start_sector, GFP_NOFS);
@ -8275,9 +8368,14 @@ static int btrfs_submit_direct_hook(int rw, struct btrfs_dio_private *dip,
bio_put(bio);
goto out_err;
}
goto next_block;
} else {
submit_len += bvec->bv_len;
nr_pages++;
submit_len += blocksize;
if (--nr_sectors) {
i++;
goto next_block;
}
bvec++;
}
}
@ -8642,6 +8740,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
struct extent_state *cached_state = NULL;
u64 page_start = page_offset(page);
u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
u64 start;
u64 end;
int inode_evicting = inode->i_state & I_FREEING;
/*
@ -8661,14 +8761,18 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
if (!inode_evicting)
lock_extent_bits(tree, page_start, page_end, &cached_state);
ordered = btrfs_lookup_ordered_extent(inode, page_start);
again:
start = page_start;
ordered = btrfs_lookup_ordered_range(inode, start,
page_end - start + 1);
if (ordered) {
end = min(page_end, ordered->file_offset + ordered->len - 1);
/*
* IO on this page will never be started, so we need
* to account for any ordered extents now
*/
if (!inode_evicting)
clear_extent_bit(tree, page_start, page_end,
clear_extent_bit(tree, start, end,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_LOCKED | EXTENT_DO_ACCOUNTING |
EXTENT_DEFRAG, 1, 0, &cached_state,
@ -8685,22 +8789,26 @@ static void btrfs_invalidatepage(struct page *page, unsigned int offset,
spin_lock_irq(&tree->lock);
set_bit(BTRFS_ORDERED_TRUNCATED, &ordered->flags);
new_len = page_start - ordered->file_offset;
new_len = start - ordered->file_offset;
if (new_len < ordered->truncated_len)
ordered->truncated_len = new_len;
spin_unlock_irq(&tree->lock);
if (btrfs_dec_test_ordered_pending(inode, &ordered,
page_start,
PAGE_CACHE_SIZE, 1))
start,
end - start + 1, 1))
btrfs_finish_ordered_io(ordered);
}
btrfs_put_ordered_extent(ordered);
if (!inode_evicting) {
cached_state = NULL;
lock_extent_bits(tree, page_start, page_end,
lock_extent_bits(tree, start, end,
&cached_state);
}
start = end + 1;
if (start < page_end)
goto again;
}
/*
@ -8761,15 +8869,28 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
loff_t size;
int ret;
int reserved = 0;
u64 reserved_space;
u64 page_start;
u64 page_end;
u64 end;
reserved_space = PAGE_CACHE_SIZE;
sb_start_pagefault(inode->i_sb);
page_start = page_offset(page);
page_end = page_start + PAGE_CACHE_SIZE - 1;
end = page_end;
/*
* Reserving delalloc space after obtaining the page lock can lead to
* deadlock. For example, if a dirty page is locked by this function
* and the call to btrfs_delalloc_reserve_space() ends up triggering
* dirty page write out, then the btrfs_writepage() function could
* end up waiting indefinitely to get a lock on the page currently
* being processed by btrfs_page_mkwrite() function.
*/
ret = btrfs_delalloc_reserve_space(inode, page_start,
PAGE_CACHE_SIZE);
reserved_space);
if (!ret) {
ret = file_update_time(vma->vm_file);
reserved = 1;
@ -8803,7 +8924,7 @@ again:
* we can't set the delalloc bits if there are pending ordered
* extents. Drop our locks and wait for them to finish
*/
ordered = btrfs_lookup_ordered_extent(inode, page_start);
ordered = btrfs_lookup_ordered_range(inode, page_start, page_end);
if (ordered) {
unlock_extent_cached(io_tree, page_start, page_end,
&cached_state, GFP_NOFS);
@ -8813,6 +8934,18 @@ again:
goto again;
}
if (page->index == ((size - 1) >> PAGE_CACHE_SHIFT)) {
reserved_space = round_up(size - page_start, root->sectorsize);
if (reserved_space < PAGE_CACHE_SIZE) {
end = page_start + reserved_space - 1;
spin_lock(&BTRFS_I(inode)->lock);
BTRFS_I(inode)->outstanding_extents++;
spin_unlock(&BTRFS_I(inode)->lock);
btrfs_delalloc_release_space(inode, page_start,
PAGE_CACHE_SIZE - reserved_space);
}
}
/*
* XXX - page_mkwrite gets called every time the page is dirtied, even
* if it was already dirty, so for space accounting reasons we need to
@ -8820,12 +8953,12 @@ again:
* is probably a better way to do this, but for now keep consistent with
* prepare_pages in the normal write path.
*/
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, page_end,
clear_extent_bit(&BTRFS_I(inode)->io_tree, page_start, end,
EXTENT_DIRTY | EXTENT_DELALLOC |
EXTENT_DO_ACCOUNTING | EXTENT_DEFRAG,
0, 0, &cached_state, GFP_NOFS);
ret = btrfs_set_extent_delalloc(inode, page_start, page_end,
ret = btrfs_set_extent_delalloc(inode, page_start, end,
&cached_state);
if (ret) {
unlock_extent_cached(io_tree, page_start, page_end,
@ -8864,7 +8997,7 @@ out_unlock:
}
unlock_page(page);
out:
btrfs_delalloc_release_space(inode, page_start, PAGE_CACHE_SIZE);
btrfs_delalloc_release_space(inode, page_start, reserved_space);
out_noreserve:
sb_end_pagefault(inode->i_sb);
return ret;
@ -9190,16 +9323,11 @@ void btrfs_destroy_cachep(void)
* destroy cache.
*/
rcu_barrier();
if (btrfs_inode_cachep)
kmem_cache_destroy(btrfs_inode_cachep);
if (btrfs_trans_handle_cachep)
kmem_cache_destroy(btrfs_trans_handle_cachep);
if (btrfs_transaction_cachep)
kmem_cache_destroy(btrfs_transaction_cachep);
if (btrfs_path_cachep)
kmem_cache_destroy(btrfs_path_cachep);
if (btrfs_free_space_cachep)
kmem_cache_destroy(btrfs_free_space_cachep);
kmem_cache_destroy(btrfs_inode_cachep);
kmem_cache_destroy(btrfs_trans_handle_cachep);
kmem_cache_destroy(btrfs_transaction_cachep);
kmem_cache_destroy(btrfs_path_cachep);
kmem_cache_destroy(btrfs_free_space_cachep);
}
int btrfs_init_cachep(void)
@ -9250,7 +9378,6 @@ static int btrfs_getattr(struct vfsmount *mnt,
generic_fillattr(inode, stat);
stat->dev = BTRFS_I(inode)->root->anon_dev;
stat->blksize = PAGE_CACHE_SIZE;
spin_lock(&BTRFS_I(inode)->lock);
delalloc_bytes = BTRFS_I(inode)->delalloc_bytes;
@ -9268,7 +9395,6 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct btrfs_root *dest = BTRFS_I(new_dir)->root;
struct inode *new_inode = d_inode(new_dentry);
struct inode *old_inode = d_inode(old_dentry);
struct timespec ctime = CURRENT_TIME;
u64 index = 0;
u64 root_objectid;
int ret;
@ -9365,9 +9491,9 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
inode_inc_iversion(old_dir);
inode_inc_iversion(new_dir);
inode_inc_iversion(old_inode);
old_dir->i_ctime = old_dir->i_mtime = ctime;
new_dir->i_ctime = new_dir->i_mtime = ctime;
old_inode->i_ctime = ctime;
old_dir->i_ctime = old_dir->i_mtime =
new_dir->i_ctime = new_dir->i_mtime =
old_inode->i_ctime = current_fs_time(old_dir->i_sb);
if (old_dentry->d_parent != new_dentry->d_parent)
btrfs_record_unlink_dir(trans, old_dir, old_inode, 1);
@ -9392,7 +9518,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_inode) {
inode_inc_iversion(new_inode);
new_inode->i_ctime = CURRENT_TIME;
new_inode->i_ctime = current_fs_time(new_inode->i_sb);
if (unlikely(btrfs_ino(new_inode) ==
BTRFS_EMPTY_SUBVOL_DIR_OBJECTID)) {
root_objectid = BTRFS_I(new_inode)->location.objectid;
@ -9870,7 +9996,7 @@ next:
*alloc_hint = ins.objectid + ins.offset;
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
inode->i_ctime = current_fs_time(inode->i_sb);
BTRFS_I(inode)->flags |= BTRFS_INODE_PREALLOC;
if (!(mode & FALLOC_FL_KEEP_SIZE) &&
(actual_len > inode->i_size) &&

35
fs/btrfs/ioctl.c
View File

@ -59,6 +59,8 @@
#include "props.h"
#include "sysfs.h"
#include "qgroup.h"
#include "tree-log.h"
#include "compression.h"
#ifdef CONFIG_64BIT
/* If we have a 32-bit userspace and 64-bit kernel, then the UAPI
@ -347,7 +349,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
btrfs_update_iflags(inode);
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
inode->i_ctime = current_fs_time(inode->i_sb);
ret = btrfs_update_inode(trans, root, inode);
btrfs_end_transaction(trans, root);
@ -443,7 +445,7 @@ static noinline int create_subvol(struct inode *dir,
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_root *new_root;
struct btrfs_block_rsv block_rsv;
struct timespec cur_time = CURRENT_TIME;
struct timespec cur_time = current_fs_time(dir->i_sb);
struct inode *inode;
int ret;
int err;
@ -844,10 +846,6 @@ static noinline int btrfs_mksubvol(struct path *parent,
if (IS_ERR(dentry))
goto out_unlock;
error = -EEXIST;
if (d_really_is_positive(dentry))
goto out_dput;
error = btrfs_may_create(dir, dentry);
if (error)
goto out_dput;
@ -2097,8 +2095,6 @@ static noinline int search_ioctl(struct inode *inode,
key.offset = (u64)-1;
root = btrfs_read_fs_root_no_name(info, &key);
if (IS_ERR(root)) {
btrfs_err(info, "could not find root %llu",
sk->tree_id);
btrfs_free_path(path);
return -ENOENT;
}
@ -2476,6 +2472,8 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
trans->block_rsv = &block_rsv;
trans->bytes_reserved = block_rsv.size;
btrfs_record_snapshot_destroy(trans, dir);
ret = btrfs_unlink_subvol(trans, root, dir,
dest->root_key.objectid,
dentry->d_name.name,
@ -2960,8 +2958,8 @@ static int btrfs_cmp_data_prepare(struct inode *src, u64 loff,
* of the array is bounded by len, which is in turn bounded by
* BTRFS_MAX_DEDUPE_LEN.
*/
src_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
dst_pgarr = kzalloc(num_pages * sizeof(struct page *), GFP_NOFS);
src_pgarr = kcalloc(num_pages, sizeof(struct page *), GFP_KERNEL);
dst_pgarr = kcalloc(num_pages, sizeof(struct page *), GFP_KERNEL);
if (!src_pgarr || !dst_pgarr) {
kfree(src_pgarr);
kfree(dst_pgarr);
@ -3066,6 +3064,9 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
inode_lock(src);
ret = extent_same_check_offsets(src, loff, &len, olen);
if (ret)
goto out_unlock;
ret = extent_same_check_offsets(src, dst_loff, &len, olen);
if (ret)
goto out_unlock;
@ -3217,7 +3218,7 @@ static int clone_finish_inode_update(struct btrfs_trans_handle *trans,
inode_inc_iversion(inode);
if (!no_time_update)
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb);
/*
* We round up to the block size at eof when determining which
* extents to clone above, but shouldn't round up the file size.
@ -3889,8 +3890,9 @@ static noinline int btrfs_clone_files(struct file *file, struct file *file_src,
* Truncate page cache pages so that future reads will see the cloned
* data immediately and not the previous data.
*/
truncate_inode_pages_range(&inode->i_data, destoff,
PAGE_CACHE_ALIGN(destoff + len) - 1);
truncate_inode_pages_range(&inode->i_data,
round_down(destoff, PAGE_CACHE_SIZE),
round_up(destoff + len, PAGE_CACHE_SIZE) - 1);
out_unlock:
if (!same_inode)
btrfs_double_inode_unlock(src, inode);
@ -5031,7 +5033,7 @@ static long _btrfs_ioctl_set_received_subvol(struct file *file,
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_root_item *root_item = &root->root_item;
struct btrfs_trans_handle *trans;
struct timespec ct = CURRENT_TIME;
struct timespec ct = current_fs_time(inode->i_sb);
int ret = 0;
int received_uuid_changed;
@ -5262,8 +5264,7 @@ out_unlock:
.compat_ro_flags = BTRFS_FEATURE_COMPAT_RO_##suffix, \
.incompat_flags = BTRFS_FEATURE_INCOMPAT_##suffix }
static int btrfs_ioctl_get_supported_features(struct file *file,
void __user *arg)
int btrfs_ioctl_get_supported_features(void __user *arg)
{
static const struct btrfs_ioctl_feature_flags features[3] = {
INIT_FEATURE_FLAGS(SUPP),
@ -5542,7 +5543,7 @@ long btrfs_ioctl(struct file *file, unsigned int
case BTRFS_IOC_SET_FSLABEL:
return btrfs_ioctl_set_fslabel(file, argp);
case BTRFS_IOC_GET_SUPPORTED_FEATURES:
return btrfs_ioctl_get_supported_features(file, argp);
return btrfs_ioctl_get_supported_features(argp);
case BTRFS_IOC_GET_FEATURES:
return btrfs_ioctl_get_features(file, argp);
case BTRFS_IOC_SET_FEATURES:

6
fs/btrfs/ordered-data.c
View File

@ -25,6 +25,7 @@
#include "btrfs_inode.h"
#include "extent_io.h"
#include "disk-io.h"
#include "compression.h"
static struct kmem_cache *btrfs_ordered_extent_cache;
@ -1009,7 +1010,7 @@ int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
for (; node; node = rb_prev(node)) {
test = rb_entry(node, struct btrfs_ordered_extent, rb_node);
/* We treat this entry as if it doesnt exist */
/* We treat this entry as if it doesn't exist */
if (test_bit(BTRFS_ORDERED_UPDATED_ISIZE, &test->flags))
continue;
if (test->file_offset + test->len <= disk_i_size)
@ -1114,6 +1115,5 @@ int __init ordered_data_init(void)
void ordered_data_exit(void)
{
if (btrfs_ordered_extent_cache)
kmem_cache_destroy(btrfs_ordered_extent_cache);
kmem_cache_destroy(btrfs_ordered_extent_cache);
}

23
fs/btrfs/print-tree.c
View File

@ -295,8 +295,27 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
btrfs_dev_extent_chunk_offset(l, dev_extent),
btrfs_dev_extent_length(l, dev_extent));
break;
case BTRFS_DEV_STATS_KEY:
printk(KERN_INFO "\t\tdevice stats\n");
case BTRFS_PERSISTENT_ITEM_KEY:
printk(KERN_INFO "\t\tpersistent item objectid %llu offset %llu\n",
key.objectid, key.offset);
switch (key.objectid) {
case BTRFS_DEV_STATS_OBJECTID:
printk(KERN_INFO "\t\tdevice stats\n");
break;
default:
printk(KERN_INFO "\t\tunknown persistent item\n");
}
break;
case BTRFS_TEMPORARY_ITEM_KEY:
printk(KERN_INFO "\t\ttemporary item objectid %llu offset %llu\n",
key.objectid, key.offset);
switch (key.objectid) {
case BTRFS_BALANCE_OBJECTID:
printk(KERN_INFO "\t\tbalance status\n");
break;
default:
printk(KERN_INFO "\t\tunknown temporary item\n");
}
break;
case BTRFS_DEV_REPLACE_KEY:
printk(KERN_INFO "\t\tdev replace\n");

1
fs/btrfs/props.c
View File

@ -22,6 +22,7 @@
#include "hash.h"
#include "transaction.h"
#include "xattr.h"
#include "compression.h"
#define BTRFS_PROP_HANDLERS_HT_BITS 8
static DEFINE_HASHTABLE(prop_handlers_ht, BTRFS_PROP_HANDLERS_HT_BITS);

268
fs/btrfs/reada.c
View File

@ -72,7 +72,7 @@ struct reada_extent {
spinlock_t lock;
struct reada_zone *zones[BTRFS_MAX_MIRRORS];
int nzones;
struct btrfs_device *scheduled_for;
int scheduled;
};
struct reada_zone {
@ -101,67 +101,53 @@ static void reada_start_machine(struct btrfs_fs_info *fs_info);
static void __reada_start_machine(struct btrfs_fs_info *fs_info);
static int reada_add_block(struct reada_control *rc, u64 logical,
struct btrfs_key *top, int level, u64 generation);
struct btrfs_key *top, u64 generation);
/* recurses */
/* in case of err, eb might be NULL */
static int __readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
u64 start, int err)
static void __readahead_hook(struct btrfs_fs_info *fs_info,
struct reada_extent *re, struct extent_buffer *eb,
u64 start, int err)
{
int level = 0;
int nritems;
int i;
u64 bytenr;
u64 generation;
struct reada_extent *re;
struct btrfs_fs_info *fs_info = root->fs_info;
struct list_head list;
unsigned long index = start >> PAGE_CACHE_SHIFT;
struct btrfs_device *for_dev;
if (eb)
level = btrfs_header_level(eb);
/* find extent */
spin_lock(&fs_info->reada_lock);
re = radix_tree_lookup(&fs_info->reada_tree, index);
if (re)
re->refcnt++;
spin_unlock(&fs_info->reada_lock);
if (!re)
return -1;
spin_lock(&re->lock);
/*
* just take the full list from the extent. afterwards we
* don't need the lock anymore
*/
list_replace_init(&re->extctl, &list);
for_dev = re->scheduled_for;
re->scheduled_for = NULL;
re->scheduled = 0;
spin_unlock(&re->lock);
if (err == 0) {
nritems = level ? btrfs_header_nritems(eb) : 0;
generation = btrfs_header_generation(eb);
/*
* FIXME: currently we just set nritems to 0 if this is a leaf,
* effectively ignoring the content. In a next step we could
* trigger more readahead depending from the content, e.g.
* fetch the checksums for the extents in the leaf.
*/
} else {
/*
* this is the error case, the extent buffer has not been
* read correctly. We won't access anything from it and
* just cleanup our data structures. Effectively this will
* cut the branch below this node from read ahead.
*/
nritems = 0;
generation = 0;
}
/*
* this is the error case, the extent buffer has not been
* read correctly. We won't access anything from it and
* just cleanup our data structures. Effectively this will
* cut the branch below this node from read ahead.
*/
if (err)
goto cleanup;
/*
* FIXME: currently we just set nritems to 0 if this is a leaf,
* effectively ignoring the content. In a next step we could
* trigger more readahead depending from the content, e.g.
* fetch the checksums for the extents in the leaf.
*/
if (!level)
goto cleanup;
nritems = btrfs_header_nritems(eb);
generation = btrfs_header_generation(eb);
for (i = 0; i < nritems; i++) {
struct reada_extctl *rec;
u64 n_gen;
@ -188,19 +174,20 @@ static int __readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
*/
#ifdef DEBUG
if (rec->generation != generation) {
btrfs_debug(root->fs_info,
"generation mismatch for (%llu,%d,%llu) %llu != %llu",
key.objectid, key.type, key.offset,
rec->generation, generation);
btrfs_debug(fs_info,
"generation mismatch for (%llu,%d,%llu) %llu != %llu",
key.objectid, key.type, key.offset,
rec->generation, generation);
}
#endif
if (rec->generation == generation &&
btrfs_comp_cpu_keys(&key, &rc->key_end) < 0 &&
btrfs_comp_cpu_keys(&next_key, &rc->key_start) > 0)
reada_add_block(rc, bytenr, &next_key,
level - 1, n_gen);
reada_add_block(rc, bytenr, &next_key, n_gen);
}
}
cleanup:
/*
* free extctl records
*/
@ -222,26 +209,37 @@ static int __readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
reada_extent_put(fs_info, re); /* one ref for each entry */
}
reada_extent_put(fs_info, re); /* our ref */
if (for_dev)
atomic_dec(&for_dev->reada_in_flight);
return 0;
return;
}
/*
* start is passed separately in case eb in NULL, which may be the case with
* failed I/O
*/
int btree_readahead_hook(struct btrfs_root *root, struct extent_buffer *eb,
u64 start, int err)
int btree_readahead_hook(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, u64 start, int err)
{
int ret;
int ret = 0;
struct reada_extent *re;
ret = __readahead_hook(root, eb, start, err);
/* find extent */
spin_lock(&fs_info->reada_lock);
re = radix_tree_lookup(&fs_info->reada_tree,
start >> PAGE_CACHE_SHIFT);
if (re)
re->refcnt++;
spin_unlock(&fs_info->reada_lock);
if (!re) {
ret = -1;
goto start_machine;
}
reada_start_machine(root->fs_info);
__readahead_hook(fs_info, re, eb, start, err);
reada_extent_put(fs_info, re); /* our ref */
start_machine:
reada_start_machine(fs_info);
return ret;
}
@ -260,18 +258,14 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
spin_lock(&fs_info->reada_lock);
ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,
logical >> PAGE_CACHE_SHIFT, 1);
if (ret == 1)
if (ret == 1 && logical >= zone->start && logical <= zone->end) {
kref_get(&zone->refcnt);
spin_unlock(&fs_info->reada_lock);
if (ret == 1) {
if (logical >= zone->start && logical < zone->end)
return zone;
spin_lock(&fs_info->reada_lock);
kref_put(&zone->refcnt, reada_zone_release);
spin_unlock(&fs_info->reada_lock);
return zone;
}
spin_unlock(&fs_info->reada_lock);
cache = btrfs_lookup_block_group(fs_info, logical);
if (!cache)
return NULL;
@ -280,7 +274,7 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
end = start + cache->key.offset - 1;
btrfs_put_block_group(cache);
zone = kzalloc(sizeof(*zone), GFP_NOFS);
zone = kzalloc(sizeof(*zone), GFP_KERNEL);
if (!zone)
return NULL;
@ -307,8 +301,10 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
kfree(zone);
ret = radix_tree_gang_lookup(&dev->reada_zones, (void **)&zone,
logical >> PAGE_CACHE_SHIFT, 1);
if (ret == 1)
if (ret == 1 && logical >= zone->start && logical <= zone->end)
kref_get(&zone->refcnt);
else
zone = NULL;
}
spin_unlock(&fs_info->reada_lock);
@ -317,7 +313,7 @@ static struct reada_zone *reada_find_zone(struct btrfs_fs_info *fs_info,
static struct reada_extent *reada_find_extent(struct btrfs_root *root,
u64 logical,
struct btrfs_key *top, int level)
struct btrfs_key *top)
{
int ret;
struct reada_extent *re = NULL;
@ -330,9 +326,9 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
u64 length;
int real_stripes;
int nzones = 0;
int i;
unsigned long index = logical >> PAGE_CACHE_SHIFT;
int dev_replace_is_ongoing;
int have_zone = 0;
spin_lock(&fs_info->reada_lock);
re = radix_tree_lookup(&fs_info->reada_tree, index);
@ -343,7 +339,7 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
if (re)
return re;
re = kzalloc(sizeof(*re), GFP_NOFS);
re = kzalloc(sizeof(*re), GFP_KERNEL);
if (!re)
return NULL;
@ -375,11 +371,16 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
struct reada_zone *zone;
dev = bbio->stripes[nzones].dev;
/* cannot read ahead on missing device. */
if (!dev->bdev)
continue;
zone = reada_find_zone(fs_info, dev, logical, bbio);
if (!zone)
break;
continue;
re->zones[nzones] = zone;
re->zones[re->nzones++] = zone;
spin_lock(&zone->lock);
if (!zone->elems)
kref_get(&zone->refcnt);
@ -389,14 +390,13 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
kref_put(&zone->refcnt, reada_zone_release);
spin_unlock(&fs_info->reada_lock);
}
re->nzones = nzones;
if (nzones == 0) {
if (re->nzones == 0) {
/* not a single zone found, error and out */
goto error;
}
/* insert extent in reada_tree + all per-device trees, all or nothing */
btrfs_dev_replace_lock(&fs_info->dev_replace);
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
spin_lock(&fs_info->reada_lock);
ret = radix_tree_insert(&fs_info->reada_tree, index, re);
if (ret == -EEXIST) {
@ -404,19 +404,20 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
BUG_ON(!re_exist);
re_exist->refcnt++;
spin_unlock(&fs_info->reada_lock);
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
goto error;
}
if (ret) {
spin_unlock(&fs_info->reada_lock);
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
goto error;
}
prev_dev = NULL;
dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(
&fs_info->dev_replace);
for (i = 0; i < nzones; ++i) {
dev = bbio->stripes[i].dev;
for (nzones = 0; nzones < re->nzones; ++nzones) {
dev = re->zones[nzones]->device;
if (dev == prev_dev) {
/*
* in case of DUP, just add the first zone. As both
@ -427,15 +428,9 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
*/
continue;
}
if (!dev->bdev) {
/*
* cannot read ahead on missing device, but for RAID5/6,
* REQ_GET_READ_MIRRORS return 1. So don't skip missing
* device for such case.
*/
if (nzones > 1)
continue;
}
if (!dev->bdev)
continue;
if (dev_replace_is_ongoing &&
dev == fs_info->dev_replace.tgtdev) {
/*
@ -447,8 +442,8 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
prev_dev = dev;
ret = radix_tree_insert(&dev->reada_extents, index, re);
if (ret) {
while (--i >= 0) {
dev = bbio->stripes[i].dev;
while (--nzones >= 0) {
dev = re->zones[nzones]->device;
BUG_ON(dev == NULL);
/* ignore whether the entry was inserted */
radix_tree_delete(&dev->reada_extents, index);
@ -456,21 +451,24 @@ static struct reada_extent *reada_find_extent(struct btrfs_root *root,
BUG_ON(fs_info == NULL);
radix_tree_delete(&fs_info->reada_tree, index);
spin_unlock(&fs_info->reada_lock);
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
goto error;
}
have_zone = 1;
}
spin_unlock(&fs_info->reada_lock);
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
if (!have_zone)
goto error;
btrfs_put_bbio(bbio);
return re;
error:
while (nzones) {
for (nzones = 0; nzones < re->nzones; ++nzones) {
struct reada_zone *zone;
--nzones;
zone = re->zones[nzones];
kref_get(&zone->refcnt);
spin_lock(&zone->lock);
@ -531,8 +529,6 @@ static void reada_extent_put(struct btrfs_fs_info *fs_info,
kref_put(&zone->refcnt, reada_zone_release);
spin_unlock(&fs_info->reada_lock);
}
if (re->scheduled_for)
atomic_dec(&re->scheduled_for->reada_in_flight);
kfree(re);
}
@ -556,17 +552,17 @@ static void reada_control_release(struct kref *kref)
}
static int reada_add_block(struct reada_control *rc, u64 logical,
struct btrfs_key *top, int level, u64 generation)
struct btrfs_key *top, u64 generation)
{
struct btrfs_root *root = rc->root;
struct reada_extent *re;
struct reada_extctl *rec;
re = reada_find_extent(root, logical, top, level); /* takes one ref */
re = reada_find_extent(root, logical, top); /* takes one ref */
if (!re)
return -1;
rec = kzalloc(sizeof(*rec), GFP_NOFS);
rec = kzalloc(sizeof(*rec), GFP_KERNEL);
if (!rec) {
reada_extent_put(root->fs_info, re);
return -ENOMEM;
@ -662,7 +658,6 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
u64 logical;
int ret;
int i;
int need_kick = 0;
spin_lock(&fs_info->reada_lock);
if (dev->reada_curr_zone == NULL) {
@ -679,7 +674,7 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
*/
ret = radix_tree_gang_lookup(&dev->reada_extents, (void **)&re,
dev->reada_next >> PAGE_CACHE_SHIFT, 1);
if (ret == 0 || re->logical >= dev->reada_curr_zone->end) {
if (ret == 0 || re->logical > dev->reada_curr_zone->end) {
ret = reada_pick_zone(dev);
if (!ret) {
spin_unlock(&fs_info->reada_lock);
@ -698,6 +693,15 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
spin_unlock(&fs_info->reada_lock);
spin_lock(&re->lock);
if (re->scheduled || list_empty(&re->extctl)) {
spin_unlock(&re->lock);
reada_extent_put(fs_info, re);
return 0;
}
re->scheduled = 1;
spin_unlock(&re->lock);
/*
* find mirror num
*/
@ -709,29 +713,20 @@ static int reada_start_machine_dev(struct btrfs_fs_info *fs_info,
}
logical = re->logical;
spin_lock(&re->lock);
if (re->scheduled_for == NULL) {
re->scheduled_for = dev;
need_kick = 1;
}
spin_unlock(&re->lock);
reada_extent_put(fs_info, re);
if (!need_kick)
return 0;
atomic_inc(&dev->reada_in_flight);
ret = reada_tree_block_flagged(fs_info->extent_root, logical,
mirror_num, &eb);
if (ret)
__readahead_hook(fs_info->extent_root, NULL, logical, ret);
__readahead_hook(fs_info, re, NULL, logical, ret);
else if (eb)
__readahead_hook(fs_info->extent_root, eb, eb->start, ret);
__readahead_hook(fs_info, re, eb, eb->start, ret);
if (eb)
free_extent_buffer(eb);
atomic_dec(&dev->reada_in_flight);
reada_extent_put(fs_info, re);
return 1;
}
@ -752,6 +747,8 @@ static void reada_start_machine_worker(struct btrfs_work *work)
set_task_ioprio(current, BTRFS_IOPRIO_READA);
__reada_start_machine(fs_info);
set_task_ioprio(current, old_ioprio);
atomic_dec(&fs_info->reada_works_cnt);
}
static void __reada_start_machine(struct btrfs_fs_info *fs_info)
@ -783,15 +780,19 @@ static void __reada_start_machine(struct btrfs_fs_info *fs_info)
* enqueue to workers to finish it. This will distribute the load to
* the cores.
*/
for (i = 0; i < 2; ++i)
for (i = 0; i < 2; ++i) {
reada_start_machine(fs_info);
if (atomic_read(&fs_info->reada_works_cnt) >
BTRFS_MAX_MIRRORS * 2)
break;
}
}
static void reada_start_machine(struct btrfs_fs_info *fs_info)
{
struct reada_machine_work *rmw;
rmw = kzalloc(sizeof(*rmw), GFP_NOFS);
rmw = kzalloc(sizeof(*rmw), GFP_KERNEL);
if (!rmw) {
/* FIXME we cannot handle this properly right now */
BUG();
@ -801,6 +802,7 @@ static void reada_start_machine(struct btrfs_fs_info *fs_info)
rmw->fs_info = fs_info;
btrfs_queue_work(fs_info->readahead_workers, &rmw->work);
atomic_inc(&fs_info->reada_works_cnt);
}
#ifdef DEBUG
@ -848,10 +850,9 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
if (ret == 0)
break;
printk(KERN_DEBUG
" re: logical %llu size %u empty %d for %lld",
" re: logical %llu size %u empty %d scheduled %d",
re->logical, fs_info->tree_root->nodesize,
list_empty(&re->extctl), re->scheduled_for ?
re->scheduled_for->devid : -1);
list_empty(&re->extctl), re->scheduled);
for (i = 0; i < re->nzones; ++i) {
printk(KERN_CONT " zone %llu-%llu devs",
@ -878,27 +879,21 @@ static void dump_devs(struct btrfs_fs_info *fs_info, int all)
index, 1);
if (ret == 0)
break;
if (!re->scheduled_for) {
if (!re->scheduled) {
index = (re->logical >> PAGE_CACHE_SHIFT) + 1;
continue;
}
printk(KERN_DEBUG
"re: logical %llu size %u list empty %d for %lld",
"re: logical %llu size %u list empty %d scheduled %d",
re->logical, fs_info->tree_root->nodesize,
list_empty(&re->extctl),
re->scheduled_for ? re->scheduled_for->devid : -1);
list_empty(&re->extctl), re->scheduled);
for (i = 0; i < re->nzones; ++i) {
printk(KERN_CONT " zone %llu-%llu devs",
re->zones[i]->start,
re->zones[i]->end);
for (i = 0; i < re->nzones; ++i) {
printk(KERN_CONT " zone %llu-%llu devs",
re->zones[i]->start,
re->zones[i]->end);
for (j = 0; j < re->zones[i]->ndevs; ++j) {
printk(KERN_CONT " %lld",
re->zones[i]->devs[j]->devid);
}
for (j = 0; j < re->zones[i]->ndevs; ++j) {
printk(KERN_CONT " %lld",
re->zones[i]->devs[j]->devid);
}
}
printk(KERN_CONT "\n");
@ -917,7 +912,6 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
struct reada_control *rc;
u64 start;
u64 generation;
int level;
int ret;
struct extent_buffer *node;
static struct btrfs_key max_key = {
@ -926,7 +920,7 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
.offset = (u64)-1
};
rc = kzalloc(sizeof(*rc), GFP_NOFS);
rc = kzalloc(sizeof(*rc), GFP_KERNEL);
if (!rc)
return ERR_PTR(-ENOMEM);
@ -940,11 +934,10 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
node = btrfs_root_node(root);
start = node->start;
level = btrfs_header_level(node);
generation = btrfs_header_generation(node);
free_extent_buffer(node);
ret = reada_add_block(rc, start, &max_key, level, generation);
ret = reada_add_block(rc, start, &max_key, generation);
if (ret) {
kfree(rc);
return ERR_PTR(ret);
@ -959,8 +952,11 @@ struct reada_control *btrfs_reada_add(struct btrfs_root *root,
int btrfs_reada_wait(void *handle)
{
struct reada_control *rc = handle;
struct btrfs_fs_info *fs_info = rc->root->fs_info;
while (atomic_read(&rc->elems)) {
if (!atomic_read(&fs_info->reada_works_cnt))
reada_start_machine(fs_info);
wait_event_timeout(rc->wait, atomic_read(&rc->elems) == 0,
5 * HZ);
dump_devs(rc->root->fs_info,
@ -977,9 +973,13 @@ int btrfs_reada_wait(void *handle)
int btrfs_reada_wait(void *handle)
{
struct reada_control *rc = handle;
struct btrfs_fs_info *fs_info = rc->root->fs_info;
while (atomic_read(&rc->elems)) {
wait_event(rc->wait, atomic_read(&rc->elems) == 0);
if (!atomic_read(&fs_info->reada_works_cnt))
reada_start_machine(fs_info);
wait_event_timeout(rc->wait, atomic_read(&rc->elems) == 0,
(HZ + 9) / 10);
}
kref_put(&rc->refcnt, reada_control_release);

2
fs/btrfs/root-tree.c
View File

@ -496,7 +496,7 @@ void btrfs_update_root_times(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_root_item *item = &root->root_item;
struct timespec ct = CURRENT_TIME;
struct timespec ct = current_fs_time(root->fs_info->sb);
spin_lock(&root->root_item_lock);
btrfs_set_root_ctransid(item, trans->transid);

32
fs/btrfs/scrub.c
View File

@ -461,7 +461,7 @@ struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
struct btrfs_fs_info *fs_info = dev->dev_root->fs_info;
int ret;
sctx = kzalloc(sizeof(*sctx), GFP_NOFS);
sctx = kzalloc(sizeof(*sctx), GFP_KERNEL);
if (!sctx)
goto nomem;
atomic_set(&sctx->refs, 1);
@ -472,7 +472,7 @@ struct scrub_ctx *scrub_setup_ctx(struct btrfs_device *dev, int is_dev_replace)
for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
struct scrub_bio *sbio;
sbio = kzalloc(sizeof(*sbio), GFP_NOFS);
sbio = kzalloc(sizeof(*sbio), GFP_KERNEL);
if (!sbio)
goto nomem;
sctx->bios[i] = sbio;
@ -611,7 +611,7 @@ static void scrub_print_warning(const char *errstr, struct scrub_block *sblock)
u64 flags = 0;
u64 ref_root;
u32 item_size;
u8 ref_level;
u8 ref_level = 0;
int ret;
WARN_ON(sblock->page_count < 1);
@ -1654,7 +1654,7 @@ static int scrub_add_page_to_wr_bio(struct scrub_ctx *sctx,
again:
if (!wr_ctx->wr_curr_bio) {
wr_ctx->wr_curr_bio = kzalloc(sizeof(*wr_ctx->wr_curr_bio),
GFP_NOFS);
GFP_KERNEL);
if (!wr_ctx->wr_curr_bio) {
mutex_unlock(&wr_ctx->wr_lock);
return -ENOMEM;
@ -1671,7 +1671,8 @@ again:
sbio->dev = wr_ctx->tgtdev;
bio = sbio->bio;
if (!bio) {
bio = btrfs_io_bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio);
bio = btrfs_io_bio_alloc(GFP_KERNEL,
wr_ctx->pages_per_wr_bio);
if (!bio) {
mutex_unlock(&wr_ctx->wr_lock);
return -ENOMEM;
@ -2076,7 +2077,8 @@ again:
sbio->dev = spage->dev;
bio = sbio->bio;
if (!bio) {
bio = btrfs_io_bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio);
bio = btrfs_io_bio_alloc(GFP_KERNEL,
sctx->pages_per_rd_bio);
if (!bio)
return -ENOMEM;
sbio->bio = bio;
@ -2241,7 +2243,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
struct scrub_block *sblock;
int index;
sblock = kzalloc(sizeof(*sblock), GFP_NOFS);
sblock = kzalloc(sizeof(*sblock), GFP_KERNEL);
if (!sblock) {
spin_lock(&sctx->stat_lock);
sctx->stat.malloc_errors++;
@ -2259,7 +2261,7 @@ static int scrub_pages(struct scrub_ctx *sctx, u64 logical, u64 len,
struct scrub_page *spage;
u64 l = min_t(u64, len, PAGE_SIZE);
spage = kzalloc(sizeof(*spage), GFP_NOFS);
spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
leave_nomem:
spin_lock(&sctx->stat_lock);
@ -2286,7 +2288,7 @@ leave_nomem:
spage->have_csum = 0;
}
sblock->page_count++;
spage->page = alloc_page(GFP_NOFS);
spage->page = alloc_page(GFP_KERNEL);
if (!spage->page)
goto leave_nomem;
len -= l;
@ -2541,7 +2543,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
struct scrub_block *sblock;
int index;
sblock = kzalloc(sizeof(*sblock), GFP_NOFS);
sblock = kzalloc(sizeof(*sblock), GFP_KERNEL);
if (!sblock) {
spin_lock(&sctx->stat_lock);
sctx->stat.malloc_errors++;
@ -2561,7 +2563,7 @@ static int scrub_pages_for_parity(struct scrub_parity *sparity,
struct scrub_page *spage;
u64 l = min_t(u64, len, PAGE_SIZE);
spage = kzalloc(sizeof(*spage), GFP_NOFS);
spage = kzalloc(sizeof(*spage), GFP_KERNEL);
if (!spage) {
leave_nomem:
spin_lock(&sctx->stat_lock);
@ -2591,7 +2593,7 @@ leave_nomem:
spage->have_csum = 0;
}
sblock->page_count++;
spage->page = alloc_page(GFP_NOFS);
spage->page = alloc_page(GFP_KERNEL);
if (!spage->page)
goto leave_nomem;
len -= l;
@ -3857,16 +3859,16 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
return -EIO;
}
btrfs_dev_replace_lock(&fs_info->dev_replace);
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (dev->scrub_device ||
(!is_dev_replace &&
btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))) {
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
mutex_unlock(&fs_info->scrub_lock);
mutex_unlock(&fs_info->fs_devices->device_list_mutex);
return -EINPROGRESS;
}
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
ret = scrub_workers_get(fs_info, is_dev_replace);
if (ret) {

37
fs/btrfs/send.c
View File

@ -34,6 +34,7 @@
#include "disk-io.h"
#include "btrfs_inode.h"
#include "transaction.h"
#include "compression.h"
static int g_verbose = 0;
@ -304,7 +305,7 @@ 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 +364,11 @@ 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 +996,7 @@ 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 +1043,7 @@ 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 +1304,7 @@ 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 +1985,7 @@ 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 +2180,7 @@ 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 +2316,7 @@ 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 +2731,7 @@ 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 +2756,7 @@ 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 +2819,7 @@ 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 +2974,7 @@ 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 +3041,7 @@ 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 +4281,7 @@ 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 +4482,7 @@ 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 +5990,7 @@ 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 +5998,7 @@ 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;

52
fs/btrfs/super.c
View File

@ -303,7 +303,8 @@ enum {
Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree,
Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard,
Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow,
Opt_datasum, Opt_treelog, Opt_noinode_cache,
Opt_datasum, Opt_treelog, Opt_noinode_cache, Opt_usebackuproot,
Opt_nologreplay, Opt_norecovery,
#ifdef CONFIG_BTRFS_DEBUG
Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all,
#endif
@ -335,6 +336,8 @@ static const match_table_t tokens = {
{Opt_noacl, "noacl"},
{Opt_notreelog, "notreelog"},
{Opt_treelog, "treelog"},
{Opt_nologreplay, "nologreplay"},
{Opt_norecovery, "norecovery"},
{Opt_flushoncommit, "flushoncommit"},
{Opt_noflushoncommit, "noflushoncommit"},
{Opt_ratio, "metadata_ratio=%d"},
@ -352,7 +355,8 @@ static const match_table_t tokens = {
{Opt_inode_cache, "inode_cache"},
{Opt_noinode_cache, "noinode_cache"},
{Opt_no_space_cache, "nospace_cache"},
{Opt_recovery, "recovery"},
{Opt_recovery, "recovery"}, /* deprecated */
{Opt_usebackuproot, "usebackuproot"},
{Opt_skip_balance, "skip_balance"},
{Opt_check_integrity, "check_int"},
{Opt_check_integrity_including_extent_data, "check_int_data"},
@ -373,7 +377,8 @@ static const match_table_t tokens = {
* reading in a new superblock is parsed here.
* XXX JDM: This needs to be cleaned up for remount.
*/
int btrfs_parse_options(struct btrfs_root *root, char *options)
int btrfs_parse_options(struct btrfs_root *root, char *options,
unsigned long new_flags)
{
struct btrfs_fs_info *info = root->fs_info;
substring_t args[MAX_OPT_ARGS];
@ -393,8 +398,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
else if (cache_gen)
btrfs_set_opt(info->mount_opt, SPACE_CACHE);
/*
* Even the options are empty, we still need to do extra check
* against new flags
*/
if (!options)
goto out;
goto check;
/*
* strsep changes the string, duplicate it because parse_options
@ -606,6 +615,11 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
btrfs_clear_and_info(root, NOTREELOG,
"enabling tree log");
break;
case Opt_norecovery:
case Opt_nologreplay:
btrfs_set_and_info(root, NOLOGREPLAY,
"disabling log replay at mount time");
break;
case Opt_flushoncommit:
btrfs_set_and_info(root, FLUSHONCOMMIT,
"turning on flush-on-commit");
@ -696,8 +710,12 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
"disabling auto defrag");
break;
case Opt_recovery:
btrfs_info(root->fs_info, "enabling auto recovery");
btrfs_set_opt(info->mount_opt, RECOVERY);
btrfs_warn(root->fs_info,
"'recovery' is deprecated, use 'usebackuproot' instead");
case Opt_usebackuproot:
btrfs_info(root->fs_info,
"trying to use backup root at mount time");
btrfs_set_opt(info->mount_opt, USEBACKUPROOT);
break;
case Opt_skip_balance:
btrfs_set_opt(info->mount_opt, SKIP_BALANCE);
@ -792,6 +810,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
break;
}
}
check:
/*
* Extra check for current option against current flag
*/
if (btrfs_test_opt(root, NOLOGREPLAY) && !(new_flags & MS_RDONLY)) {
btrfs_err(root->fs_info,
"nologreplay must be used with ro mount option");
ret = -EINVAL;
}
out:
if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE) &&
!btrfs_test_opt(root, FREE_SPACE_TREE) &&
@ -1202,6 +1229,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",ssd");
if (btrfs_test_opt(root, NOTREELOG))
seq_puts(seq, ",notreelog");
if (btrfs_test_opt(root, NOLOGREPLAY))
seq_puts(seq, ",nologreplay");
if (btrfs_test_opt(root, FLUSHONCOMMIT))
seq_puts(seq, ",flushoncommit");
if (btrfs_test_opt(root, DISCARD))
@ -1228,8 +1257,6 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry)
seq_puts(seq, ",inode_cache");
if (btrfs_test_opt(root, SKIP_BALANCE))
seq_puts(seq, ",skip_balance");
if (btrfs_test_opt(root, RECOVERY))
seq_puts(seq, ",recovery");
#ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
if (btrfs_test_opt(root, CHECK_INTEGRITY_INCLUDING_EXTENT_DATA))
seq_puts(seq, ",check_int_data");
@ -1685,7 +1712,7 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data)
}
}
ret = btrfs_parse_options(root, data);
ret = btrfs_parse_options(root, data, *flags);
if (ret) {
ret = -EINVAL;
goto restore;
@ -2163,6 +2190,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
break;
ret = !(fs_devices->num_devices == fs_devices->total_devices);
break;
case BTRFS_IOC_GET_SUPPORTED_FEATURES:
ret = btrfs_ioctl_get_supported_features((void __user*)arg);
break;
}
kfree(vol);
@ -2261,7 +2291,7 @@ static void btrfs_interface_exit(void)
misc_deregister(&btrfs_misc);
}
static void btrfs_print_info(void)
static void btrfs_print_mod_info(void)
{
printk(KERN_INFO "Btrfs loaded"
#ifdef CONFIG_BTRFS_DEBUG
@ -2363,7 +2393,7 @@ static int __init init_btrfs_fs(void)
btrfs_init_lockdep();
btrfs_print_info();
btrfs_print_mod_info();
err = btrfs_run_sanity_tests();
if (err)

6
fs/btrfs/tests/btrfs-tests.c
View File

@ -188,12 +188,6 @@ btrfs_alloc_dummy_block_group(unsigned long length)
kfree(cache);
return NULL;
}
cache->fs_info = btrfs_alloc_dummy_fs_info();
if (!cache->fs_info) {
kfree(cache->free_space_ctl);
kfree(cache);
return NULL;
}
cache->key.objectid = 0;
cache->key.offset = length;

1
fs/btrfs/tests/free-space-tree-tests.c
View File

@ -485,6 +485,7 @@ static int run_test(test_func_t test_func, int bitmaps)
cache->bitmap_low_thresh = 0;
cache->bitmap_high_thresh = (u32)-1;
cache->needs_free_space = 1;
cache->fs_info = root->fs_info;
btrfs_init_dummy_trans(&trans);

1
fs/btrfs/tests/inode-tests.c
View File

@ -22,6 +22,7 @@
#include "../disk-io.h"
#include "../extent_io.h"
#include "../volumes.h"
#include "../compression.h"
static void insert_extent(struct btrfs_root *root, u64 start, u64 len,
u64 ram_bytes, u64 offset, u64 disk_bytenr,

13
fs/btrfs/transaction.c
View File

@ -637,6 +637,8 @@ struct btrfs_trans_handle *btrfs_start_transaction_fallback_global_rsv(
trans->block_rsv = &root->fs_info->trans_block_rsv;
trans->bytes_reserved = num_bytes;
trace_btrfs_space_reservation(root->fs_info, "transaction",
trans->transid, num_bytes, 1);
return trans;
}
@ -1333,7 +1335,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
struct dentry *dentry;
struct extent_buffer *tmp;
struct extent_buffer *old;
struct timespec cur_time = CURRENT_TIME;
struct timespec cur_time;
int ret = 0;
u64 to_reserve = 0;
u64 index = 0;
@ -1375,12 +1377,16 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
rsv = trans->block_rsv;
trans->block_rsv = &pending->block_rsv;
trans->bytes_reserved = trans->block_rsv->reserved;
trace_btrfs_space_reservation(root->fs_info, "transaction",
trans->transid,
trans->bytes_reserved, 1);
dentry = pending->dentry;
parent_inode = pending->dir;
parent_root = BTRFS_I(parent_inode)->root;
record_root_in_trans(trans, parent_root);
cur_time = current_fs_time(parent_inode->i_sb);
/*
* insert the directory item
*/
@ -1523,7 +1529,8 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
btrfs_i_size_write(parent_inode, parent_inode->i_size +
dentry->d_name.len * 2);
parent_inode->i_mtime = parent_inode->i_ctime = CURRENT_TIME;
parent_inode->i_mtime = parent_inode->i_ctime =
current_fs_time(parent_inode->i_sb);
ret = btrfs_update_inode_fallback(trans, parent_root, parent_inode);
if (ret) {
btrfs_abort_transaction(trans, root, ret);

102
fs/btrfs/tree-log.c
View File

@ -26,6 +26,7 @@
#include "print-tree.h"
#include "backref.h"
#include "hash.h"
#include "compression.h"
/* magic values for the inode_only field in btrfs_log_inode:
*
@ -1045,7 +1046,7 @@ again:
/*
* NOTE: we have searched root tree and checked the
* coresponding ref, it does not need to check again.
* corresponding ref, it does not need to check again.
*/
*search_done = 1;
}
@ -4500,7 +4501,22 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
mutex_lock(&BTRFS_I(inode)->log_mutex);
btrfs_get_logged_extents(inode, &logged_list, start, end);
/*
* Collect ordered extents only if we are logging data. This is to
* ensure a subsequent request to log this inode in LOG_INODE_ALL mode
* will process the ordered extents if they still exists at the time,
* because when we collect them we test and set for the flag
* BTRFS_ORDERED_LOGGED to prevent multiple log requests to process the
* same ordered extents. The consequence for the LOG_INODE_ALL log mode
* not processing the ordered extents is that we end up logging the
* corresponding file extent items, based on the extent maps in the
* inode's extent_map_tree's modified_list, without logging the
* respective checksums (since the may still be only attached to the
* ordered extents and have not been inserted in the csum tree by
* btrfs_finish_ordered_io() yet).
*/
if (inode_only == LOG_INODE_ALL)
btrfs_get_logged_extents(inode, &logged_list, start, end);
/*
* a brute force approach to making sure we get the most uptodate
@ -4771,6 +4787,42 @@ out_unlock:
return err;
}
/*
* Check if we must fallback to a transaction commit when logging an inode.
* This must be called after logging the inode and is used only in the context
* when fsyncing an inode requires the need to log some other inode - in which
* case we can't lock the i_mutex of each other inode we need to log as that
* can lead to deadlocks with concurrent fsync against other inodes (as we can
* log inodes up or down in the hierarchy) or rename operations for example. So
* we take the log_mutex of the inode after we have logged it and then check for
* its last_unlink_trans value - this is safe because any task setting
* last_unlink_trans must take the log_mutex and it must do this before it does
* the actual unlink operation, so if we do this check before a concurrent task
* sets last_unlink_trans it means we've logged a consistent version/state of
* all the inode items, otherwise we are not sure and must do a transaction
* commit (the concurrent task migth have only updated last_unlink_trans before
* we logged the inode or it might have also done the unlink).
*/
static bool btrfs_must_commit_transaction(struct btrfs_trans_handle *trans,
struct inode *inode)
{
struct btrfs_fs_info *fs_info = BTRFS_I(inode)->root->fs_info;
bool ret = false;
mutex_lock(&BTRFS_I(inode)->log_mutex);
if (BTRFS_I(inode)->last_unlink_trans > fs_info->last_trans_committed) {
/*
* Make sure any commits to the log are forced to be full
* commits.
*/
btrfs_set_log_full_commit(fs_info, trans);
ret = true;
}
mutex_unlock(&BTRFS_I(inode)->log_mutex);
return ret;
}
/*
* follow the dentry parent pointers up the chain and see if any
* of the directories in it require a full commit before they can
@ -4784,7 +4836,6 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans,
u64 last_committed)
{
int ret = 0;
struct btrfs_root *root;
struct dentry *old_parent = NULL;
struct inode *orig_inode = inode;
@ -4816,14 +4867,7 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans,
BTRFS_I(inode)->logged_trans = trans->transid;
smp_mb();
if (BTRFS_I(inode)->last_unlink_trans > last_committed) {
root = BTRFS_I(inode)->root;
/*
* make sure any commits to the log are forced
* to be full commits
*/
btrfs_set_log_full_commit(root->fs_info, trans);
if (btrfs_must_commit_transaction(trans, inode)) {
ret = 1;
break;
}
@ -4982,6 +5026,9 @@ process_leaf:
btrfs_release_path(path);
ret = btrfs_log_inode(trans, root, di_inode,
log_mode, 0, LLONG_MAX, ctx);
if (!ret &&
btrfs_must_commit_transaction(trans, di_inode))
ret = 1;
iput(di_inode);
if (ret)
goto next_dir_inode;
@ -5096,6 +5143,9 @@ static int btrfs_log_all_parents(struct btrfs_trans_handle *trans,
ret = btrfs_log_inode(trans, root, dir_inode,
LOG_INODE_ALL, 0, LLONG_MAX, ctx);
if (!ret &&
btrfs_must_commit_transaction(trans, dir_inode))
ret = 1;
iput(dir_inode);
if (ret)
goto out;
@ -5447,6 +5497,9 @@ error:
* They revolve around files there were unlinked from the directory, and
* this function updates the parent directory so that a full commit is
* properly done if it is fsync'd later after the unlinks are done.
*
* Must be called before the unlink operations (updates to the subvolume tree,
* inodes, etc) are done.
*/
void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
struct inode *dir, struct inode *inode,
@ -5462,8 +5515,11 @@ void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
* into the file. When the file is logged we check it and
* don't log the parents if the file is fully on disk.
*/
if (S_ISREG(inode->i_mode))
if (S_ISREG(inode->i_mode)) {
mutex_lock(&BTRFS_I(inode)->log_mutex);
BTRFS_I(inode)->last_unlink_trans = trans->transid;
mutex_unlock(&BTRFS_I(inode)->log_mutex);
}
/*
* if this directory was already logged any new
@ -5494,7 +5550,29 @@ void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
return;
record:
mutex_lock(&BTRFS_I(dir)->log_mutex);
BTRFS_I(dir)->last_unlink_trans = trans->transid;
mutex_unlock(&BTRFS_I(dir)->log_mutex);
}
/*
* Make sure that if someone attempts to fsync the parent directory of a deleted
* snapshot, it ends up triggering a transaction commit. This is to guarantee
* that after replaying the log tree of the parent directory's root we will not
* see the snapshot anymore and at log replay time we will not see any log tree
* corresponding to the deleted snapshot's root, which could lead to replaying
* it after replaying the log tree of the parent directory (which would replay
* the snapshot delete operation).
*
* Must be called before the actual snapshot destroy operation (updates to the
* parent root and tree of tree roots trees, etc) are done.
*/
void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
struct inode *dir)
{
mutex_lock(&BTRFS_I(dir)->log_mutex);
BTRFS_I(dir)->last_unlink_trans = trans->transid;
mutex_unlock(&BTRFS_I(dir)->log_mutex);
}
/*

2
fs/btrfs/tree-log.h
View File

@ -79,6 +79,8 @@ int btrfs_pin_log_trans(struct btrfs_root *root);
void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
struct inode *dir, struct inode *inode,
int for_rename);
void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
struct inode *dir);
int btrfs_log_new_name(struct btrfs_trans_handle *trans,
struct inode *inode, struct inode *old_dir,
struct dentry *parent);

51
fs/btrfs/volumes.c
View File

@ -138,7 +138,7 @@ static struct btrfs_fs_devices *__alloc_fs_devices(void)
{
struct btrfs_fs_devices *fs_devs;
fs_devs = kzalloc(sizeof(*fs_devs), GFP_NOFS);
fs_devs = kzalloc(sizeof(*fs_devs), GFP_KERNEL);
if (!fs_devs)
return ERR_PTR(-ENOMEM);
@ -220,7 +220,7 @@ static struct btrfs_device *__alloc_device(void)
{
struct btrfs_device *dev;
dev = kzalloc(sizeof(*dev), GFP_NOFS);
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev)
return ERR_PTR(-ENOMEM);
@ -733,7 +733,8 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
* uuid mutex so nothing we touch in here is going to disappear.
*/
if (orig_dev->name) {
name = rcu_string_strdup(orig_dev->name->str, GFP_NOFS);
name = rcu_string_strdup(orig_dev->name->str,
GFP_KERNEL);
if (!name) {
kfree(device);
goto error;
@ -1714,12 +1715,12 @@ int btrfs_rm_device(struct btrfs_root *root, char *device_path)
} while (read_seqretry(&root->fs_info->profiles_lock, seq));
num_devices = root->fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&root->fs_info->dev_replace);
btrfs_dev_replace_lock(&root->fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&root->fs_info->dev_replace)) {
WARN_ON(num_devices < 1);
num_devices--;
}
btrfs_dev_replace_unlock(&root->fs_info->dev_replace);
btrfs_dev_replace_unlock(&root->fs_info->dev_replace, 0);
if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices <= 4) {
ret = BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET;
@ -2287,7 +2288,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
goto error;
}
name = rcu_string_strdup(device_path, GFP_NOFS);
name = rcu_string_strdup(device_path, GFP_KERNEL);
if (!name) {
kfree(device);
ret = -ENOMEM;
@ -2748,7 +2749,7 @@ int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
em->start + em->len < chunk_offset) {
/*
* This is a logic error, but we don't want to just rely on the
* user having built with ASSERT enabled, so if ASSERT doens't
* user having built with ASSERT enabled, so if ASSERT doesn't
* do anything we still error out.
*/
ASSERT(0);
@ -2966,7 +2967,7 @@ static int insert_balance_item(struct btrfs_root *root,
}
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_BALANCE_ITEM_KEY;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_insert_empty_item(trans, root, path, &key,
@ -3015,7 +3016,7 @@ static int del_balance_item(struct btrfs_root *root)
}
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_BALANCE_ITEM_KEY;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
@ -3686,12 +3687,12 @@ int btrfs_balance(struct btrfs_balance_control *bctl,
}
num_devices = fs_info->fs_devices->num_devices;
btrfs_dev_replace_lock(&fs_info->dev_replace);
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace)) {
BUG_ON(num_devices < 1);
num_devices--;
}
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
if (num_devices == 1)
allowed |= BTRFS_BLOCK_GROUP_DUP;
@ -3867,7 +3868,7 @@ int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
return -ENOMEM;
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_BALANCE_ITEM_KEY;
key.type = BTRFS_TEMPORARY_ITEM_KEY;
key.offset = 0;
ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
@ -4118,7 +4119,7 @@ out:
* Callback for btrfs_uuid_tree_iterate().
* returns:
* 0 check succeeded, the entry is not outdated.
* < 0 if an error occured.
* < 0 if an error occurred.
* > 0 if the check failed, which means the caller shall remove the entry.
*/
static int btrfs_check_uuid_tree_entry(struct btrfs_fs_info *fs_info,
@ -5062,10 +5063,10 @@ int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len)
ret = 1;
free_extent_map(em);
btrfs_dev_replace_lock(&fs_info->dev_replace);
btrfs_dev_replace_lock(&fs_info->dev_replace, 0);
if (btrfs_dev_replace_is_ongoing(&fs_info->dev_replace))
ret++;
btrfs_dev_replace_unlock(&fs_info->dev_replace);
btrfs_dev_replace_unlock(&fs_info->dev_replace, 0);
return ret;
}
@ -5325,10 +5326,12 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
if (!bbio_ret)
goto out;
btrfs_dev_replace_lock(dev_replace);
btrfs_dev_replace_lock(dev_replace, 0);
dev_replace_is_ongoing = btrfs_dev_replace_is_ongoing(dev_replace);
if (!dev_replace_is_ongoing)
btrfs_dev_replace_unlock(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
else
btrfs_dev_replace_set_lock_blocking(dev_replace);
if (dev_replace_is_ongoing && mirror_num == map->num_stripes + 1 &&
!(rw & (REQ_WRITE | REQ_DISCARD | REQ_GET_READ_MIRRORS)) &&
@ -5751,8 +5754,10 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
bbio->mirror_num = map->num_stripes + 1;
}
out:
if (dev_replace_is_ongoing)
btrfs_dev_replace_unlock(dev_replace);
if (dev_replace_is_ongoing) {
btrfs_dev_replace_clear_lock_blocking(dev_replace);
btrfs_dev_replace_unlock(dev_replace, 0);
}
free_extent_map(em);
return ret;
}
@ -6705,8 +6710,8 @@ int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info)
int item_size;
struct btrfs_dev_stats_item *ptr;
key.objectid = 0;
key.type = BTRFS_DEV_STATS_KEY;
key.objectid = BTRFS_DEV_STATS_OBJECTID;
key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
ret = btrfs_search_slot(NULL, dev_root, &key, path, 0, 0);
if (ret) {
@ -6753,8 +6758,8 @@ static int update_dev_stat_item(struct btrfs_trans_handle *trans,
int ret;
int i;
key.objectid = 0;
key.type = BTRFS_DEV_STATS_KEY;
key.objectid = BTRFS_DEV_STATS_OBJECTID;
key.type = BTRFS_PERSISTENT_ITEM_KEY;
key.offset = device->devid;
path = btrfs_alloc_path();

65
fs/btrfs/xattr.c
View File

@ -249,7 +249,7 @@ int __btrfs_setxattr(struct btrfs_trans_handle *trans,
goto out;
inode_inc_iversion(inode);
inode->i_ctime = CURRENT_TIME;
inode->i_ctime = current_fs_time(inode->i_sb);
set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
@ -260,16 +260,12 @@ out:
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
struct btrfs_key key, found_key;
struct btrfs_key key;
struct inode *inode = d_inode(dentry);
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_dir_item *di;
int ret = 0, slot;
int ret = 0;
size_t total_size = 0, size_left = size;
unsigned long name_ptr;
size_t name_len;
/*
* ok we want all objects associated with this id.
@ -291,6 +287,13 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
goto err;
while (1) {
struct extent_buffer *leaf;
int slot;
struct btrfs_dir_item *di;
struct btrfs_key found_key;
u32 item_size;
u32 cur;
leaf = path->nodes[0];
slot = path->slots[0];
@ -316,31 +319,45 @@ ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
if (found_key.type > BTRFS_XATTR_ITEM_KEY)
break;
if (found_key.type < BTRFS_XATTR_ITEM_KEY)
goto next;
goto next_item;
di = btrfs_item_ptr(leaf, slot, struct btrfs_dir_item);
if (verify_dir_item(root, leaf, di))
goto next;
item_size = btrfs_item_size_nr(leaf, slot);
cur = 0;
while (cur < item_size) {
u16 name_len = btrfs_dir_name_len(leaf, di);
u16 data_len = btrfs_dir_data_len(leaf, di);
u32 this_len = sizeof(*di) + name_len + data_len;
unsigned long name_ptr = (unsigned long)(di + 1);
name_len = btrfs_dir_name_len(leaf, di);
total_size += name_len + 1;
if (verify_dir_item(root, leaf, di)) {
ret = -EIO;
goto err;
}
/* we are just looking for how big our buffer needs to be */
if (!size)
goto next;
total_size += name_len + 1;
/*
* We are just looking for how big our buffer needs to
* be.
*/
if (!size)
goto next;
if (!buffer || (name_len + 1) > size_left) {
ret = -ERANGE;
goto err;
}
if (!buffer || (name_len + 1) > size_left) {
ret = -ERANGE;
goto err;
}
name_ptr = (unsigned long)(di + 1);
read_extent_buffer(leaf, buffer, name_ptr, name_len);
buffer[name_len] = '\0';
read_extent_buffer(leaf, buffer, name_ptr, name_len);
buffer[name_len] = '\0';
size_left -= name_len + 1;
buffer += name_len + 1;
size_left -= name_len + 1;
buffer += name_len + 1;
next:
cur += this_len;
di = (struct btrfs_dir_item *)((char *)di + this_len);
}
next_item:
path->slots[0]++;
}
ret = total_size;