#include <linux/sched.h>
#include <linux/mount.h>
#include <linux/namei.h>
+ #include <linux/iversion.h>
#include "internal.h"
static const struct inode_operations afs_symlink_inode_operations = {
inode->i_atime = inode->i_mtime = inode->i_ctime;
inode->i_blocks = 0;
inode->i_generation = vnode->fid.unique;
- inode->i_version = vnode->status.data_version;
+ inode_set_iversion_raw(inode, vnode->status.data_version);
inode->i_mapping->a_ops = &afs_fs_aops;
read_sequnlock_excl(&vnode->cb_lock);
inode->i_ctime.tv_nsec = 0;
inode->i_atime = inode->i_mtime = inode->i_ctime;
inode->i_blocks = 0;
- inode->i_version = 0;
+ inode_set_iversion_raw(inode, 0);
inode->i_generation = 0;
set_bit(AFS_VNODE_PSEUDODIR, &vnode->flags);
}
read_sequnlock_excl(&vnode->cb_lock);
+
+ if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
+ clear_nlink(&vnode->vfs_inode);
+
if (valid)
goto valid;
*/
#include <linux/slab.h>
+ #include <linux/iversion.h>
#include "delayed-inode.h"
#include "disk-io.h"
#include "transaction.h"
spin_lock(&root->inode_lock);
node = radix_tree_lookup(&root->delayed_nodes_tree, ino);
+
if (node) {
if (btrfs_inode->delayed_node) {
refcount_inc(&node->refs); /* can be accessed */
spin_unlock(&root->inode_lock);
return node;
}
- btrfs_inode->delayed_node = node;
- /* can be accessed and cached in the inode */
- refcount_add(2, &node->refs);
+
+ /*
+ * It's possible that we're racing into the middle of removing
+ * this node from the radix tree. In this case, the refcount
+ * was zero and it should never go back to one. Just return
+ * NULL like it was never in the radix at all; our release
+ * function is in the process of removing it.
+ *
+ * Some implementations of refcount_inc refuse to bump the
+ * refcount once it has hit zero. If we don't do this dance
+ * here, refcount_inc() may decide to just WARN_ONCE() instead
+ * of actually bumping the refcount.
+ *
+ * If this node is properly in the radix, we want to bump the
+ * refcount twice, once for the inode and once for this get
+ * operation.
+ */
+ if (refcount_inc_not_zero(&node->refs)) {
+ refcount_inc(&node->refs);
+ btrfs_inode->delayed_node = node;
+ } else {
+ node = NULL;
+ }
+
spin_unlock(&root->inode_lock);
return node;
}
mutex_unlock(&delayed_node->mutex);
if (refcount_dec_and_test(&delayed_node->refs)) {
- bool free = false;
struct btrfs_root *root = delayed_node->root;
+
spin_lock(&root->inode_lock);
- if (refcount_read(&delayed_node->refs) == 0) {
- radix_tree_delete(&root->delayed_nodes_tree,
- delayed_node->inode_id);
- free = true;
- }
+ /*
+ * Once our refcount goes to zero, nobody is allowed to bump it
+ * back up. We can delete it now.
+ */
+ ASSERT(refcount_read(&delayed_node->refs) == 0);
+ radix_tree_delete(&root->delayed_nodes_tree,
+ delayed_node->inode_id);
spin_unlock(&root->inode_lock);
- if (free)
- kmem_cache_free(delayed_node_cache, delayed_node);
+ kmem_cache_free(delayed_node_cache, delayed_node);
}
}
int btrfs_should_delete_dir_index(struct list_head *del_list,
u64 index)
{
- struct btrfs_delayed_item *curr, *next;
- int ret;
-
- if (list_empty(del_list))
- return 0;
+ struct btrfs_delayed_item *curr;
+ int ret = 0;
- list_for_each_entry_safe(curr, next, del_list, readdir_list) {
+ list_for_each_entry(curr, del_list, readdir_list) {
if (curr->key.offset > index)
break;
-
- list_del(&curr->readdir_list);
- ret = (curr->key.offset == index);
-
- if (refcount_dec_and_test(&curr->refs))
- kfree(curr);
-
- if (ret)
- return 1;
- else
- continue;
+ if (curr->key.offset == index) {
+ ret = 1;
+ break;
+ }
}
- return 0;
+ return ret;
}
/*
btrfs_set_stack_inode_nbytes(inode_item, inode_get_bytes(inode));
btrfs_set_stack_inode_generation(inode_item,
BTRFS_I(inode)->generation);
- btrfs_set_stack_inode_sequence(inode_item, inode->i_version);
+ btrfs_set_stack_inode_sequence(inode_item,
+ inode_peek_iversion(inode));
btrfs_set_stack_inode_transid(inode_item, trans->transid);
btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev);
btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags);
BTRFS_I(inode)->generation = btrfs_stack_inode_generation(inode_item);
BTRFS_I(inode)->last_trans = btrfs_stack_inode_transid(inode_item);
- inode->i_version = btrfs_stack_inode_sequence(inode_item);
+ inode_set_iversion_queried(inode,
+ btrfs_stack_inode_sequence(inode_item));
inode->i_rdev = 0;
*rdev = btrfs_stack_inode_rdev(inode_item);
BTRFS_I(inode)->flags = btrfs_stack_inode_flags(inode_item);
#include <linux/posix_acl_xattr.h>
#include <linux/uio.h>
#include <linux/magic.h>
+ #include <linux/iversion.h>
#include "ctree.h"
#include "disk-io.h"
#include "transaction.h"
BTRFS_I(inode)->generation = btrfs_inode_generation(leaf, inode_item);
BTRFS_I(inode)->last_trans = btrfs_inode_transid(leaf, inode_item);
- inode->i_version = btrfs_inode_sequence(leaf, inode_item);
+ inode_set_iversion_queried(inode,
+ btrfs_inode_sequence(leaf, inode_item));
inode->i_generation = BTRFS_I(inode)->generation;
inode->i_rdev = 0;
rdev = btrfs_inode_rdev(leaf, inode_item);
&token);
btrfs_set_token_inode_generation(leaf, item, BTRFS_I(inode)->generation,
&token);
- btrfs_set_token_inode_sequence(leaf, item, inode->i_version, &token);
+ btrfs_set_token_inode_sequence(leaf, item, inode_peek_iversion(inode),
+ &token);
btrfs_set_token_inode_transid(leaf, item, trans->transid, &token);
btrfs_set_token_inode_rdev(leaf, item, inode->i_rdev, &token);
btrfs_set_token_inode_flags(leaf, item, BTRFS_I(inode)->flags, &token);
int flags)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
+ bool dirty = flags & ~S_VERSION;
if (btrfs_root_readonly(root))
return -EROFS;
if (flags & S_VERSION)
- inode_inc_iversion(inode);
+ dirty |= inode_maybe_inc_iversion(inode, dirty);
if (flags & S_CTIME)
inode->i_ctime = *now;
if (flags & S_MTIME)
inode->i_mtime = *now;
if (flags & S_ATIME)
inode->i_atime = *now;
- return btrfs_dirty_inode(inode);
+ return dirty ? btrfs_dirty_inode(inode) : 0;
}
/*
int segs;
int ret;
blk_status_t status;
+ struct bio_vec bvec;
BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE);
}
segs = bio_segments(failed_bio);
+ bio_get_first_bvec(failed_bio, &bvec);
if (segs > 1 ||
- (failed_bio->bi_io_vec->bv_len > btrfs_inode_sectorsize(inode)))
+ (bvec.bv_len > btrfs_inode_sectorsize(inode)))
read_mode |= REQ_FAILFAST_DEV;
isector = start - btrfs_io_bio(failed_bio)->logical;
ASSERT(bio->bi_vcnt == 1);
io_tree = &BTRFS_I(inode)->io_tree;
failure_tree = &BTRFS_I(inode)->io_failure_tree;
- ASSERT(bio->bi_io_vec->bv_len == btrfs_inode_sectorsize(inode));
+ ASSERT(bio_first_bvec_all(bio)->bv_len == btrfs_inode_sectorsize(inode));
done->uptodate = 1;
ASSERT(!bio_flagged(bio, BIO_CLONED));
uptodate = 1;
ASSERT(bio->bi_vcnt == 1);
- ASSERT(bio->bi_io_vec->bv_len == btrfs_inode_sectorsize(done->inode));
+ ASSERT(bio_first_bvec_all(bio)->bv_len == btrfs_inode_sectorsize(done->inode));
io_tree = &BTRFS_I(inode)->io_tree;
failure_tree = &BTRFS_I(inode)->io_failure_tree;
#include <linux/slab.h>
#include <linux/bitops.h>
#include <linux/iomap.h>
+ #include <linux/iversion.h>
#include "ext4_jbd2.h"
#include "xattr.h"
*/
int ext4_inode_is_fast_symlink(struct inode *inode)
{
+ if (!(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) {
+ int ea_blocks = EXT4_I(inode)->i_file_acl ?
+ EXT4_CLUSTER_SIZE(inode->i_sb) >> 9 : 0;
+
+ if (ext4_has_inline_data(inode))
+ return 0;
+
+ return (S_ISLNK(inode->i_mode) && inode->i_blocks - ea_blocks == 0);
+ }
return S_ISLNK(inode->i_mode) && inode->i_size &&
(inode->i_size < EXT4_N_BLOCKS * 4);
}
EXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);
if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
- inode->i_version = le32_to_cpu(raw_inode->i_disk_version);
+ u64 ivers = le32_to_cpu(raw_inode->i_disk_version);
+
if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
- inode->i_version |=
+ ivers |=
(__u64)(le32_to_cpu(raw_inode->i_version_hi)) << 32;
}
+ inode_set_iversion_queried(inode, ivers);
}
ret = 0;
}
if (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {
- raw_inode->i_disk_version = cpu_to_le32(inode->i_version);
+ u64 ivers = inode_peek_iversion(inode);
+
+ raw_inode->i_disk_version = cpu_to_le32(ivers);
if (ei->i_extra_isize) {
if (EXT4_FITS_IN_INODE(raw_inode, ei, i_version_hi))
raw_inode->i_version_hi =
- cpu_to_le32(inode->i_version >> 32);
+ cpu_to_le32(ivers >> 32);
raw_inode->i_extra_isize =
cpu_to_le16(ei->i_extra_isize);
}
#include <linux/quotaops.h>
#include <linux/buffer_head.h>
#include <linux/bio.h>
+ #include <linux/iversion.h>
#include "ext4.h"
#include "ext4_jbd2.h"
"falling back\n"));
}
nblocks = dir->i_size >> EXT4_BLOCK_SIZE_BITS(sb);
+ if (!nblocks) {
+ ret = NULL;
+ goto cleanup_and_exit;
+ }
start = EXT4_I(dir)->i_dir_start_lookup;
if (start >= nblocks)
start = 0;
"empty directory '%.*s' has too many links (%u)",
dentry->d_name.len, dentry->d_name.name,
inode->i_nlink);
- inode->i_version++;
+ inode_inc_iversion(inode);
clear_nlink(inode);
/* There's no need to set i_disksize: the fact that i_nlink is
* zero will ensure that the right thing happens during any
ent->de->inode = cpu_to_le32(ino);
if (ext4_has_feature_filetype(ent->dir->i_sb))
ent->de->file_type = file_type;
- ent->dir->i_version++;
+ inode_inc_iversion(ent->dir);
ent->dir->i_ctime = ent->dir->i_mtime =
current_time(ent->dir);
ext4_mark_inode_dirty(handle, ent->dir);
#include <linux/export.h>
#include <linux/freezer.h>
#include <linux/wait.h>
+ #include <linux/iversion.h>
#include <linux/uaccess.h>
*/
spin_lock(&mapping->private_lock);
if (!nfs_have_writebacks(inode) &&
- NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE)) {
- spin_lock(&inode->i_lock);
- inode->i_version++;
- spin_unlock(&inode->i_lock);
- }
+ NFS_PROTO(inode)->have_delegation(inode, FMODE_WRITE))
+ inode_inc_iversion_raw(inode);
if (likely(!PageSwapCache(req->wb_page))) {
set_bit(PG_MAPPED, &req->wb_flags);
SetPagePrivate(req->wb_page);
if (res)
error = nfs_generic_commit_list(inode, &head, how, &cinfo);
nfs_commit_end(cinfo.mds);
+ if (res == 0)
+ return res;
if (error < 0)
goto out_error;
if (!may_wait)
#include <linux/kthread.h>
#include <linux/freezer.h>
+ #include <linux/iversion.h>
/*
* Allocate and initialise an xfs_inode.
int error;
uint32_t nlink = inode->i_nlink;
uint32_t generation = inode->i_generation;
- uint64_t version = inode->i_version;
+ uint64_t version = inode_peek_iversion(inode);
umode_t mode = inode->i_mode;
error = inode_init_always(mp->m_super, inode);
set_nlink(inode, nlink);
inode->i_generation = generation;
- inode->i_version = version;
+ inode_set_iversion_queried(inode, version);
inode->i_mode = mode;
return error;
}
* based on the 'speculative_cow_prealloc_lifetime' tunable (5m by default).
* (We'll just piggyback on the post-EOF prealloc space workqueue.)
*/
-STATIC void
+void
xfs_queue_cowblocks(
struct xfs_mount *mp)
{
return __xfs_inode_free_quota_eofblocks(ip, xfs_icache_free_eofblocks);
}
+static inline unsigned long
+xfs_iflag_for_tag(
+ int tag)
+{
+ switch (tag) {
+ case XFS_ICI_EOFBLOCKS_TAG:
+ return XFS_IEOFBLOCKS;
+ case XFS_ICI_COWBLOCKS_TAG:
+ return XFS_ICOWBLOCKS;
+ default:
+ ASSERT(0);
+ return 0;
+ }
+}
+
static void
-__xfs_inode_set_eofblocks_tag(
+__xfs_inode_set_blocks_tag(
xfs_inode_t *ip,
void (*execute)(struct xfs_mount *mp),
void (*set_tp)(struct xfs_mount *mp, xfs_agnumber_t agno,
* Don't bother locking the AG and looking up in the radix trees
* if we already know that we have the tag set.
*/
- if (ip->i_flags & XFS_IEOFBLOCKS)
+ if (ip->i_flags & xfs_iflag_for_tag(tag))
return;
spin_lock(&ip->i_flags_lock);
- ip->i_flags |= XFS_IEOFBLOCKS;
+ ip->i_flags |= xfs_iflag_for_tag(tag);
spin_unlock(&ip->i_flags_lock);
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
xfs_inode_t *ip)
{
trace_xfs_inode_set_eofblocks_tag(ip);
- return __xfs_inode_set_eofblocks_tag(ip, xfs_queue_eofblocks,
+ return __xfs_inode_set_blocks_tag(ip, xfs_queue_eofblocks,
trace_xfs_perag_set_eofblocks,
XFS_ICI_EOFBLOCKS_TAG);
}
static void
-__xfs_inode_clear_eofblocks_tag(
+__xfs_inode_clear_blocks_tag(
xfs_inode_t *ip,
void (*clear_tp)(struct xfs_mount *mp, xfs_agnumber_t agno,
int error, unsigned long caller_ip),
struct xfs_perag *pag;
spin_lock(&ip->i_flags_lock);
- ip->i_flags &= ~XFS_IEOFBLOCKS;
+ ip->i_flags &= ~xfs_iflag_for_tag(tag);
spin_unlock(&ip->i_flags_lock);
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
xfs_inode_t *ip)
{
trace_xfs_inode_clear_eofblocks_tag(ip);
- return __xfs_inode_clear_eofblocks_tag(ip,
+ return __xfs_inode_clear_blocks_tag(ip,
trace_xfs_perag_clear_eofblocks, XFS_ICI_EOFBLOCKS_TAG);
}
xfs_inode_t *ip)
{
trace_xfs_inode_set_cowblocks_tag(ip);
- return __xfs_inode_set_eofblocks_tag(ip, xfs_queue_cowblocks,
+ return __xfs_inode_set_blocks_tag(ip, xfs_queue_cowblocks,
trace_xfs_perag_set_cowblocks,
XFS_ICI_COWBLOCKS_TAG);
}
xfs_inode_t *ip)
{
trace_xfs_inode_clear_cowblocks_tag(ip);
- return __xfs_inode_clear_eofblocks_tag(ip,
+ return __xfs_inode_clear_blocks_tag(ip,
trace_xfs_perag_clear_cowblocks, XFS_ICI_COWBLOCKS_TAG);
}
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/log2.h>
+ #include <linux/iversion.h>
#include "xfs.h"
#include "xfs_fs.h"
xfs_nlink_t nlink,
dev_t rdev,
prid_t prid,
- int okalloc,
xfs_buf_t **ialloc_context,
xfs_inode_t **ipp)
{
* Call the space management code to pick
* the on-disk inode to be allocated.
*/
- error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc,
+ error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode,
ialloc_context, &ino);
if (error)
return error;
ip->i_d.di_flags = 0;
if (ip->i_d.di_version == 3) {
- inode->i_version = 1;
+ inode_set_iversion(inode, 1);
ip->i_d.di_flags2 = 0;
ip->i_d.di_cowextsize = 0;
ip->i_d.di_crtime.t_sec = (int32_t)tv.tv_sec;
xfs_nlink_t nlink,
dev_t rdev,
prid_t prid, /* project id */
- int okalloc, /* ok to allocate new space */
xfs_inode_t **ipp, /* pointer to inode; it will be
locked. */
int *committed)
* transaction commit so that no other process can steal
* the inode(s) that we've just allocated.
*/
- code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, okalloc,
- &ialloc_context, &ip);
+ code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid, &ialloc_context,
+ &ip);
/*
* Return an error if we were unable to allocate a new inode.
* this call should always succeed.
*/
code = xfs_ialloc(tp, dp, mode, nlink, rdev, prid,
- okalloc, &ialloc_context, &ip);
+ &ialloc_context, &ip);
/*
* If we get an error at this point, return to the caller
xfs_flush_inodes(mp);
error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp);
}
- if (error == -ENOSPC) {
- /* No space at all so try a "no-allocation" reservation */
- resblks = 0;
- error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp);
- }
if (error)
goto out_release_inode;
if (error)
goto out_trans_cancel;
- if (!resblks) {
- error = xfs_dir_canenter(tp, dp, name);
- if (error)
- goto out_trans_cancel;
- }
-
/*
* A newly created regular or special file just has one directory
* entry pointing to them, but a directory also the "." entry
* pointing to itself.
*/
- error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev,
- prid, resblks > 0, &ip, NULL);
+ error = xfs_dir_ialloc(&tp, dp, mode, is_dir ? 2 : 1, rdev, prid, &ip,
+ NULL);
if (error)
goto out_trans_cancel;
tres = &M_RES(mp)->tr_create_tmpfile;
error = xfs_trans_alloc(mp, tres, resblks, 0, 0, &tp);
- if (error == -ENOSPC) {
- /* No space at all so try a "no-allocation" reservation */
- resblks = 0;
- error = xfs_trans_alloc(mp, tres, 0, 0, 0, &tp);
- }
if (error)
goto out_release_inode;
if (error)
goto out_trans_cancel;
- error = xfs_dir_ialloc(&tp, dp, mode, 1, 0,
- prid, resblks > 0, &ip, NULL);
+ error = xfs_dir_ialloc(&tp, dp, mode, 1, 0, prid, &ip, NULL);
if (error)
goto out_trans_cancel;
return error;
}
+/* Clear the reflink flag and the cowblocks tag if possible. */
+static void
+xfs_itruncate_clear_reflink_flags(
+ struct xfs_inode *ip)
+{
+ struct xfs_ifork *dfork;
+ struct xfs_ifork *cfork;
+
+ if (!xfs_is_reflink_inode(ip))
+ return;
+ dfork = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
+ cfork = XFS_IFORK_PTR(ip, XFS_COW_FORK);
+ if (dfork->if_bytes == 0 && cfork->if_bytes == 0)
+ ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
+ if (cfork->if_bytes == 0)
+ xfs_inode_clear_cowblocks_tag(ip);
+}
+
/*
* Free up the underlying blocks past new_size. The new size must be smaller
* than the current size. This routine can be used both for the attribute and
if (error)
goto out;
- /*
- * Clear the reflink flag if there are no data fork blocks and
- * there are no extents staged in the cow fork.
- */
- if (xfs_is_reflink_inode(ip) && ip->i_cnextents == 0) {
- if (ip->i_d.di_nblocks == 0)
- ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
- xfs_inode_clear_cowblocks_tag(ip);
- }
+ xfs_itruncate_clear_reflink_flags(ip);
/*
* Always re-log the inode so that our permanent transaction can keep
projects / mirror_ubuntu-focal-kernel.git / commitdiff