#include <linux/pagemap.h>
#include <linux/uio.h>
#include <linux/sched.h>
-#include <linux/pipe_fs_i.h>
+#include <linux/splice.h>
#include <linux/mount.h>
#include <linux/writeback.h>
+#include <linux/falloc.h>
+#include <linux/quotaops.h>
#define MLOG_MASK_PREFIX ML_INODE
#include <cluster/masklog.h>
#include "inode.h"
#include "ioctl.h"
#include "journal.h"
+#include "locks.h"
#include "mmap.h"
#include "suballoc.h"
#include "super.h"
+#include "xattr.h"
+#include "acl.h"
+#include "quota.h"
#include "buffer_head_io.h"
return sync_mapping_buffers(inode->i_mapping);
}
+static int ocfs2_init_file_private(struct inode *inode, struct file *file)
+{
+ struct ocfs2_file_private *fp;
+
+ fp = kzalloc(sizeof(struct ocfs2_file_private), GFP_KERNEL);
+ if (!fp)
+ return -ENOMEM;
+
+ fp->fp_file = file;
+ mutex_init(&fp->fp_mutex);
+ ocfs2_file_lock_res_init(&fp->fp_flock, fp);
+ file->private_data = fp;
+
+ return 0;
+}
+
+static void ocfs2_free_file_private(struct inode *inode, struct file *file)
+{
+ struct ocfs2_file_private *fp = file->private_data;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ if (fp) {
+ ocfs2_simple_drop_lockres(osb, &fp->fp_flock);
+ ocfs2_lock_res_free(&fp->fp_flock);
+ kfree(fp);
+ file->private_data = NULL;
+ }
+}
+
static int ocfs2_file_open(struct inode *inode, struct file *file)
{
int status;
oi->ip_open_count++;
spin_unlock(&oi->ip_lock);
- status = 0;
+
+ status = ocfs2_init_file_private(inode, file);
+ if (status) {
+ /*
+ * We want to set open count back if we're failing the
+ * open.
+ */
+ spin_lock(&oi->ip_lock);
+ oi->ip_open_count--;
+ spin_unlock(&oi->ip_lock);
+ }
+
leave:
mlog_exit(status);
return status;
oi->ip_flags &= ~OCFS2_INODE_OPEN_DIRECT;
spin_unlock(&oi->ip_lock);
+ ocfs2_free_file_private(inode, file);
+
mlog_exit(0);
return 0;
}
+static int ocfs2_dir_open(struct inode *inode, struct file *file)
+{
+ return ocfs2_init_file_private(inode, file);
+}
+
+static int ocfs2_dir_release(struct inode *inode, struct file *file)
+{
+ ocfs2_free_file_private(inode, file);
+ return 0;
+}
+
static int ocfs2_sync_file(struct file *file,
struct dentry *dentry,
int datasync)
goto bail;
journal = osb->journal->j_journal;
- err = journal_force_commit(journal);
+ err = jbd2_journal_force_commit(journal);
bail:
mlog_exit(err);
int ret;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
handle_t *handle;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *) bh->b_data;
mlog_entry_void();
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
- if (handle == NULL) {
- ret = -ENOMEM;
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
+ ret = ocfs2_journal_access_di(handle, inode, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_commit;
+ }
+
+ /*
+ * Don't use ocfs2_mark_inode_dirty() here as we don't always
+ * have i_mutex to guard against concurrent changes to other
+ * inode fields.
+ */
inode->i_atime = CURRENT_TIME;
- ret = ocfs2_mark_inode_dirty(handle, inode, bh);
+ di->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
+ di->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
+
+ ret = ocfs2_journal_dirty(handle, bh);
if (ret < 0)
mlog_errno(ret);
+out_commit:
ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle);
out:
mlog_exit(ret);
return ret;
}
-int ocfs2_set_inode_size(handle_t *handle,
- struct inode *inode,
- struct buffer_head *fe_bh,
- u64 new_i_size)
+static int ocfs2_set_inode_size(handle_t *handle,
+ struct inode *inode,
+ struct buffer_head *fe_bh,
+ u64 new_i_size)
{
int status;
mlog_entry_void();
i_size_write(inode, new_i_size);
- inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size);
+ inode->i_blocks = ocfs2_inode_sector_count(inode);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
return status;
}
-static int ocfs2_simple_size_update(struct inode *inode,
- struct buffer_head *di_bh,
- u64 new_i_size)
+int ocfs2_simple_size_update(struct inode *inode,
+ struct buffer_head *di_bh,
+ u64 new_i_size)
{
int ret;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
handle_t *handle = NULL;
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
- if (handle == NULL) {
- ret = -ENOMEM;
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
int status;
handle_t *handle;
struct ocfs2_dinode *di;
+ u64 cluster_bytes;
mlog_entry_void();
goto out;
}
- status = ocfs2_journal_access(handle, inode, fe_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
+ status = ocfs2_journal_access_di(handle, inode, fe_bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto out_commit;
/*
* Do this before setting i_size.
*/
- status = ocfs2_zero_tail_for_truncate(inode, handle, new_i_size);
+ cluster_bytes = ocfs2_align_bytes_to_clusters(inode->i_sb, new_i_size);
+ status = ocfs2_zero_range_for_truncate(inode, handle, new_i_size,
+ cluster_bytes);
if (status) {
mlog_errno(status);
goto out_commit;
}
i_size_write(inode, new_i_size);
- inode->i_blocks = ocfs2_align_bytes_to_sectors(new_i_size);
inode->i_ctime = inode->i_mtime = CURRENT_TIME;
di = (struct ocfs2_dinode *) fe_bh->b_data;
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)new_i_size);
- truncate_inode_pages(inode->i_mapping, new_i_size);
-
+ /* We trust di_bh because it comes from ocfs2_inode_lock(), which
+ * already validated it */
fe = (struct ocfs2_dinode *) di_bh->b_data;
- if (!OCFS2_IS_VALID_DINODE(fe)) {
- OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
- status = -EIO;
- goto bail;
- }
mlog_bug_on_msg(le64_to_cpu(fe->i_size) != i_size_read(inode),
"Inode %llu, inode i_size = %lld != di "
if (new_i_size == le64_to_cpu(fe->i_size))
goto bail;
- /* This forces other nodes to sync and drop their pages. Do
- * this even if we have a truncate without allocation change -
- * ocfs2 cluster sizes can be much greater than page size, so
- * we have to truncate them anyway. */
- status = ocfs2_data_lock(inode, 1);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+
+ /*
+ * The inode lock forced other nodes to sync and drop their
+ * pages, which (correctly) happens even if we have a truncate
+ * without allocation change - ocfs2 cluster sizes can be much
+ * greater than page size, so we have to truncate them
+ * anyway.
+ */
+ unmap_mapping_range(inode->i_mapping, new_i_size + PAGE_SIZE - 1, 0, 1);
+ truncate_inode_pages(inode->i_mapping, new_i_size);
+
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ status = ocfs2_truncate_inline(inode, di_bh, new_i_size,
+ i_size_read(inode), 1);
+ if (status)
+ mlog_errno(status);
+
+ goto bail_unlock_sem;
}
/* alright, we're going to need to do a full blown alloc size
status = ocfs2_orphan_for_truncate(osb, inode, di_bh, new_i_size);
if (status < 0) {
mlog_errno(status);
- goto bail_unlock_data;
+ goto bail_unlock_sem;
}
status = ocfs2_prepare_truncate(osb, inode, di_bh, &tc);
if (status < 0) {
mlog_errno(status);
- goto bail_unlock_data;
+ goto bail_unlock_sem;
}
status = ocfs2_commit_truncate(osb, inode, di_bh, tc);
if (status < 0) {
mlog_errno(status);
- goto bail_unlock_data;
+ goto bail_unlock_sem;
}
/* TODO: orphan dir cleanup here. */
-bail_unlock_data:
- ocfs2_data_unlock(inode, 1);
+bail_unlock_sem:
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
bail:
}
/*
- * extend allocation only here.
+ * extend file allocation only here.
* we'll update all the disk stuff, and oip->alloc_size
*
* expect stuff to be locked, a transaction started and enough data /
* Will return -EAGAIN, and a reason if a restart is needed.
* If passed in, *reason will always be set, even in error.
*/
-int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
- struct inode *inode,
- u32 *logical_offset,
- u32 clusters_to_add,
- struct buffer_head *fe_bh,
- handle_t *handle,
- struct ocfs2_alloc_context *data_ac,
- struct ocfs2_alloc_context *meta_ac,
- enum ocfs2_alloc_restarted *reason_ret)
-{
- int status = 0;
- int free_extents;
- struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
- enum ocfs2_alloc_restarted reason = RESTART_NONE;
- u32 bit_off, num_bits;
- u64 block;
-
- BUG_ON(!clusters_to_add);
-
- free_extents = ocfs2_num_free_extents(osb, inode, fe);
- if (free_extents < 0) {
- status = free_extents;
- mlog_errno(status);
- goto leave;
- }
-
- /* there are two cases which could cause us to EAGAIN in the
- * we-need-more-metadata case:
- * 1) we haven't reserved *any*
- * 2) we are so fragmented, we've needed to add metadata too
- * many times. */
- if (!free_extents && !meta_ac) {
- mlog(0, "we haven't reserved any metadata!\n");
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- } else if ((!free_extents)
- && (ocfs2_alloc_context_bits_left(meta_ac)
- < ocfs2_extend_meta_needed(fe))) {
- mlog(0, "filesystem is really fragmented...\n");
- status = -EAGAIN;
- reason = RESTART_META;
- goto leave;
- }
-
- status = ocfs2_claim_clusters(osb, handle, data_ac, 1,
- &bit_off, &num_bits);
- if (status < 0) {
- if (status != -ENOSPC)
- mlog_errno(status);
- goto leave;
- }
-
- BUG_ON(num_bits > clusters_to_add);
-
- /* reserve our write early -- insert_extent may update the inode */
- status = ocfs2_journal_access(handle, inode, fe_bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- block = ocfs2_clusters_to_blocks(osb->sb, bit_off);
- mlog(0, "Allocating %u clusters at block %u for inode %llu\n",
- num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno);
- status = ocfs2_insert_extent(osb, handle, inode, fe_bh,
- *logical_offset, block, num_bits,
- meta_ac);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- status = ocfs2_journal_dirty(handle, fe_bh);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
- clusters_to_add -= num_bits;
- *logical_offset += num_bits;
-
- if (clusters_to_add) {
- mlog(0, "need to alloc once more, clusters = %u, wanted = "
- "%u\n", fe->i_clusters, clusters_to_add);
- status = -EAGAIN;
- reason = RESTART_TRANS;
- }
-
-leave:
- mlog_exit(status);
- if (reason_ret)
- *reason_ret = reason;
- return status;
-}
-
-/*
- * For a given allocation, determine which allocators will need to be
- * accessed, and lock them, reserving the appropriate number of bits.
- *
- * Called from ocfs2_extend_allocation() for file systems which don't
- * support holes, and from ocfs2_write() for file systems which
- * understand sparse inodes.
- */
-int ocfs2_lock_allocators(struct inode *inode, struct ocfs2_dinode *di,
- u32 clusters_to_add,
- struct ocfs2_alloc_context **data_ac,
- struct ocfs2_alloc_context **meta_ac)
+int ocfs2_add_inode_data(struct ocfs2_super *osb,
+ struct inode *inode,
+ u32 *logical_offset,
+ u32 clusters_to_add,
+ int mark_unwritten,
+ struct buffer_head *fe_bh,
+ handle_t *handle,
+ struct ocfs2_alloc_context *data_ac,
+ struct ocfs2_alloc_context *meta_ac,
+ enum ocfs2_alloc_restarted *reason_ret)
{
- int ret, num_free_extents;
- struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-
- *meta_ac = NULL;
- *data_ac = NULL;
-
- mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
- "clusters_to_add = %u\n",
- (unsigned long long)OCFS2_I(inode)->ip_blkno, i_size_read(inode),
- le32_to_cpu(di->i_clusters), clusters_to_add);
-
- num_free_extents = ocfs2_num_free_extents(osb, inode, di);
- if (num_free_extents < 0) {
- ret = num_free_extents;
- mlog_errno(ret);
- goto out;
- }
-
- /*
- * Sparse allocation file systems need to be more conservative
- * with reserving room for expansion - the actual allocation
- * happens while we've got a journal handle open so re-taking
- * a cluster lock (because we ran out of room for another
- * extent) will violate ordering rules.
- *
- * Most of the time we'll only be seeing this 1 cluster at a time
- * anyway.
- */
- if (!num_free_extents ||
- (ocfs2_sparse_alloc(osb) && num_free_extents < clusters_to_add)) {
- ret = ocfs2_reserve_new_metadata(osb, di, meta_ac);
- if (ret < 0) {
- if (ret != -ENOSPC)
- mlog_errno(ret);
- goto out;
- }
- }
-
- ret = ocfs2_reserve_clusters(osb, clusters_to_add, data_ac);
- if (ret < 0) {
- if (ret != -ENOSPC)
- mlog_errno(ret);
- goto out;
- }
-
-out:
- if (ret) {
- if (*meta_ac) {
- ocfs2_free_alloc_context(*meta_ac);
- *meta_ac = NULL;
- }
+ int ret;
+ struct ocfs2_extent_tree et;
- /*
- * We cannot have an error and a non null *data_ac.
- */
- }
+ ocfs2_init_dinode_extent_tree(&et, inode, fe_bh);
+ ret = ocfs2_add_clusters_in_btree(osb, inode, logical_offset,
+ clusters_to_add, mark_unwritten,
+ &et, handle,
+ data_ac, meta_ac, reason_ret);
return ret;
}
-static int ocfs2_extend_allocation(struct inode *inode,
- u32 clusters_to_add)
+static int __ocfs2_extend_allocation(struct inode *inode, u32 logical_start,
+ u32 clusters_to_add, int mark_unwritten)
{
int status = 0;
int restart_func = 0;
- int drop_alloc_sem = 0;
int credits;
- u32 prev_clusters, logical_start;
+ u32 prev_clusters;
struct buffer_head *bh = NULL;
struct ocfs2_dinode *fe = NULL;
handle_t *handle = NULL;
struct ocfs2_alloc_context *meta_ac = NULL;
enum ocfs2_alloc_restarted why;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_extent_tree et;
+ int did_quota = 0;
mlog_entry("(clusters_to_add = %u)\n", clusters_to_add);
* This function only exists for file systems which don't
* support holes.
*/
- BUG_ON(ocfs2_sparse_alloc(osb));
+ BUG_ON(mark_unwritten && !ocfs2_sparse_alloc(osb));
- status = ocfs2_read_block(osb, OCFS2_I(inode)->ip_blkno, &bh,
- OCFS2_BH_CACHED, inode);
+ status = ocfs2_read_inode_block(inode, &bh);
if (status < 0) {
mlog_errno(status);
goto leave;
}
-
fe = (struct ocfs2_dinode *) bh->b_data;
- if (!OCFS2_IS_VALID_DINODE(fe)) {
- OCFS2_RO_ON_INVALID_DINODE(inode->i_sb, fe);
- status = -EIO;
- goto leave;
- }
-
- logical_start = OCFS2_I(inode)->ip_clusters;
restart_all:
BUG_ON(le32_to_cpu(fe->i_clusters) != OCFS2_I(inode)->ip_clusters);
- /* blocks peope in read/write from reading our allocation
- * until we're done changing it. We depend on i_mutex to block
- * other extend/truncate calls while we're here. Ordering wrt
- * start_trans is important here -- always do it before! */
- down_write(&OCFS2_I(inode)->ip_alloc_sem);
- drop_alloc_sem = 1;
-
- status = ocfs2_lock_allocators(inode, fe, clusters_to_add, &data_ac,
- &meta_ac);
+ mlog(0, "extend inode %llu, i_size = %lld, di->i_clusters = %u, "
+ "clusters_to_add = %u\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ (long long)i_size_read(inode), le32_to_cpu(fe->i_clusters),
+ clusters_to_add);
+ ocfs2_init_dinode_extent_tree(&et, inode, bh);
+ status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0,
+ &data_ac, &meta_ac);
if (status) {
mlog_errno(status);
goto leave;
}
- credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add);
+ credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
+ clusters_to_add);
handle = ocfs2_start_trans(osb, credits);
if (IS_ERR(handle)) {
status = PTR_ERR(handle);
}
restarted_transaction:
+ if (vfs_dq_alloc_space_nodirty(inode, ocfs2_clusters_to_bytes(osb->sb,
+ clusters_to_add))) {
+ status = -EDQUOT;
+ goto leave;
+ }
+ did_quota = 1;
+
/* reserve a write to the file entry early on - that we if we
* run out of credits in the allocation path, we can still
* update i_size. */
- status = ocfs2_journal_access(handle, inode, bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
+ status = ocfs2_journal_access_di(handle, inode, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
if (status < 0) {
mlog_errno(status);
goto leave;
prev_clusters = OCFS2_I(inode)->ip_clusters;
- status = ocfs2_do_extend_allocation(osb,
- inode,
- &logical_start,
- clusters_to_add,
- bh,
- handle,
- data_ac,
- meta_ac,
- &why);
+ status = ocfs2_add_inode_data(osb,
+ inode,
+ &logical_start,
+ clusters_to_add,
+ mark_unwritten,
+ bh,
+ handle,
+ data_ac,
+ meta_ac,
+ &why);
if ((status < 0) && (status != -EAGAIN)) {
if (status != -ENOSPC)
mlog_errno(status);
spin_lock(&OCFS2_I(inode)->ip_lock);
clusters_to_add -= (OCFS2_I(inode)->ip_clusters - prev_clusters);
spin_unlock(&OCFS2_I(inode)->ip_lock);
+ /* Release unused quota reservation */
+ vfs_dq_free_space(inode,
+ ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
+ did_quota = 0;
if (why != RESTART_NONE && clusters_to_add) {
if (why == RESTART_META) {
mlog(0, "restarting transaction.\n");
/* TODO: This can be more intelligent. */
credits = ocfs2_calc_extend_credits(osb->sb,
- fe,
+ &fe->id2.i_list,
clusters_to_add);
status = ocfs2_extend_trans(handle, credits);
if (status < 0) {
}
mlog(0, "fe: i_clusters = %u, i_size=%llu\n",
- fe->i_clusters, (unsigned long long)fe->i_size);
+ le32_to_cpu(fe->i_clusters),
+ (unsigned long long)le64_to_cpu(fe->i_size));
mlog(0, "inode: ip_clusters=%u, i_size=%lld\n",
- OCFS2_I(inode)->ip_clusters, i_size_read(inode));
+ OCFS2_I(inode)->ip_clusters, (long long)i_size_read(inode));
leave:
- if (drop_alloc_sem) {
- up_write(&OCFS2_I(inode)->ip_alloc_sem);
- drop_alloc_sem = 0;
- }
+ if (status < 0 && did_quota)
+ vfs_dq_free_space(inode,
+ ocfs2_clusters_to_bytes(osb->sb, clusters_to_add));
if (handle) {
ocfs2_commit_trans(osb, handle);
handle = NULL;
restart_func = 0;
goto restart_all;
}
- if (bh) {
- brelse(bh);
- bh = NULL;
- }
+ brelse(bh);
+ bh = NULL;
mlog_exit(status);
return status;
/* Some parts of this taken from generic_cont_expand, which turned out
* to be too fragile to do exactly what we need without us having to
- * worry about recursive locking in ->prepare_write() and
- * ->commit_write(). */
+ * worry about recursive locking in ->write_begin() and ->write_end(). */
static int ocfs2_write_zero_page(struct inode *inode,
u64 size)
{
return ret;
}
-/*
- * A tail_to_skip value > 0 indicates that we're being called from
- * ocfs2_file_aio_write(). This has the following implications:
- *
- * - we don't want to update i_size
- * - di_bh will be NULL, which is fine because it's only used in the
- * case where we want to update i_size.
- * - ocfs2_zero_extend() will then only be filling the hole created
- * between i_size and the start of the write.
- */
+int ocfs2_extend_no_holes(struct inode *inode, u64 new_i_size, u64 zero_to)
+{
+ int ret;
+ u32 clusters_to_add;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
+
+ clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size);
+ if (clusters_to_add < oi->ip_clusters)
+ clusters_to_add = 0;
+ else
+ clusters_to_add -= oi->ip_clusters;
+
+ if (clusters_to_add) {
+ ret = __ocfs2_extend_allocation(inode, oi->ip_clusters,
+ clusters_to_add, 0);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ /*
+ * Call this even if we don't add any clusters to the tree. We
+ * still need to zero the area between the old i_size and the
+ * new i_size.
+ */
+ ret = ocfs2_zero_extend(inode, zero_to);
+ if (ret < 0)
+ mlog_errno(ret);
+
+out:
+ return ret;
+}
+
static int ocfs2_extend_file(struct inode *inode,
struct buffer_head *di_bh,
- u64 new_i_size,
- size_t tail_to_skip)
+ u64 new_i_size)
{
int ret = 0;
- u32 clusters_to_add = 0;
+ struct ocfs2_inode_info *oi = OCFS2_I(inode);
- BUG_ON(!tail_to_skip && !di_bh);
+ BUG_ON(!di_bh);
/* setattr sometimes calls us like this. */
if (new_i_size == 0)
goto out;
BUG_ON(new_i_size < i_size_read(inode));
- if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) {
- BUG_ON(tail_to_skip != 0);
+ /*
+ * Fall through for converting inline data, even if the fs
+ * supports sparse files.
+ *
+ * The check for inline data here is legal - nobody can add
+ * the feature since we have i_mutex. We must check it again
+ * after acquiring ip_alloc_sem though, as paths like mmap
+ * might have raced us to converting the inode to extents.
+ */
+ if (!(oi->ip_dyn_features & OCFS2_INLINE_DATA_FL)
+ && ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
goto out_update_size;
- }
- clusters_to_add = ocfs2_clusters_for_bytes(inode->i_sb, new_i_size) -
- OCFS2_I(inode)->ip_clusters;
-
- /*
- * protect the pages that ocfs2_zero_extend is going to be
- * pulling into the page cache.. we do this before the
- * metadata extend so that we don't get into the situation
- * where we've extended the metadata but can't get the data
- * lock to zero.
+ /*
+ * The alloc sem blocks people in read/write from reading our
+ * allocation until we're done changing it. We depend on
+ * i_mutex to block other extend/truncate calls while we're
+ * here.
*/
- ret = ocfs2_data_lock(inode, 1);
- if (ret < 0) {
- mlog_errno(ret);
- goto out;
- }
+ down_write(&oi->ip_alloc_sem);
+
+ if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ /*
+ * We can optimize small extends by keeping the inodes
+ * inline data.
+ */
+ if (ocfs2_size_fits_inline_data(di_bh, new_i_size)) {
+ up_write(&oi->ip_alloc_sem);
+ goto out_update_size;
+ }
+
+ ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
+ if (ret) {
+ up_write(&oi->ip_alloc_sem);
- if (clusters_to_add) {
- ret = ocfs2_extend_allocation(inode, clusters_to_add);
- if (ret < 0) {
mlog_errno(ret);
- goto out_unlock;
+ goto out;
}
}
- /*
- * Call this even if we don't add any clusters to the tree. We
- * still need to zero the area between the old i_size and the
- * new i_size.
- */
- ret = ocfs2_zero_extend(inode, (u64)new_i_size - tail_to_skip);
+ if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
+ ret = ocfs2_extend_no_holes(inode, new_i_size, new_i_size);
+
+ up_write(&oi->ip_alloc_sem);
+
if (ret < 0) {
mlog_errno(ret);
- goto out_unlock;
+ goto out;
}
out_update_size:
- if (!tail_to_skip) {
- /* We're being called from ocfs2_setattr() which wants
- * us to update i_size */
- ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
- if (ret < 0)
- mlog_errno(ret);
- }
-
-out_unlock:
- if (!ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb)))
- ocfs2_data_unlock(inode, 1);
+ ret = ocfs2_simple_size_update(inode, di_bh, new_i_size);
+ if (ret < 0)
+ mlog_errno(ret);
out:
return ret;
struct ocfs2_super *osb = OCFS2_SB(sb);
struct buffer_head *bh = NULL;
handle_t *handle = NULL;
+ int locked[MAXQUOTAS] = {0, 0};
+ int credits, qtype;
+ struct ocfs2_mem_dqinfo *oinfo;
mlog_entry("(0x%p, '%.*s')\n", dentry,
dentry->d_name.len, dentry->d_name.name);
+ /* ensuring we don't even attempt to truncate a symlink */
+ if (S_ISLNK(inode->i_mode))
+ attr->ia_valid &= ~ATTR_SIZE;
+
if (attr->ia_valid & ATTR_MODE)
mlog(0, "mode change: %d\n", attr->ia_mode);
if (attr->ia_valid & ATTR_UID)
}
}
- status = ocfs2_meta_lock(inode, &bh, 1);
+ status = ocfs2_inode_lock(inode, &bh, 1);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
}
if (size_change && attr->ia_size != i_size_read(inode)) {
- if (i_size_read(inode) > attr->ia_size)
+ if (attr->ia_size > sb->s_maxbytes) {
+ status = -EFBIG;
+ goto bail_unlock;
+ }
+
+ if (i_size_read(inode) > attr->ia_size) {
+ if (ocfs2_should_order_data(inode)) {
+ status = ocfs2_begin_ordered_truncate(inode,
+ attr->ia_size);
+ if (status)
+ goto bail_unlock;
+ }
status = ocfs2_truncate_file(inode, bh, attr->ia_size);
- else
- status = ocfs2_extend_file(inode, bh, attr->ia_size, 0);
+ } else
+ status = ocfs2_extend_file(inode, bh, attr->ia_size);
if (status < 0) {
if (status != -ENOSPC)
mlog_errno(status);
}
}
- handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
- if (IS_ERR(handle)) {
- status = PTR_ERR(handle);
- mlog_errno(status);
- goto bail_unlock;
+ if ((attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid) ||
+ (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid)) {
+ credits = OCFS2_INODE_UPDATE_CREDITS;
+ if (attr->ia_valid & ATTR_UID && attr->ia_uid != inode->i_uid
+ && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_USRQUOTA)) {
+ oinfo = sb_dqinfo(sb, USRQUOTA)->dqi_priv;
+ status = ocfs2_lock_global_qf(oinfo, 1);
+ if (status < 0)
+ goto bail_unlock;
+ credits += ocfs2_calc_qinit_credits(sb, USRQUOTA) +
+ ocfs2_calc_qdel_credits(sb, USRQUOTA);
+ locked[USRQUOTA] = 1;
+ }
+ if (attr->ia_valid & ATTR_GID && attr->ia_gid != inode->i_gid
+ && OCFS2_HAS_RO_COMPAT_FEATURE(sb,
+ OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)) {
+ oinfo = sb_dqinfo(sb, GRPQUOTA)->dqi_priv;
+ status = ocfs2_lock_global_qf(oinfo, 1);
+ if (status < 0)
+ goto bail_unlock;
+ credits += ocfs2_calc_qinit_credits(sb, GRPQUOTA) +
+ ocfs2_calc_qdel_credits(sb, GRPQUOTA);
+ locked[GRPQUOTA] = 1;
+ }
+ handle = ocfs2_start_trans(osb, credits);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ mlog_errno(status);
+ goto bail_unlock;
+ }
+ status = vfs_dq_transfer(inode, attr) ? -EDQUOT : 0;
+ if (status < 0)
+ goto bail_commit;
+ } else {
+ handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ status = PTR_ERR(handle);
+ mlog_errno(status);
+ goto bail_unlock;
+ }
}
+ /*
+ * This will intentionally not wind up calling vmtruncate(),
+ * since all the work for a size change has been done above.
+ * Otherwise, we could get into problems with truncate as
+ * ip_alloc_sem is used there to protect against i_size
+ * changes.
+ */
status = inode_setattr(inode, attr);
if (status < 0) {
mlog_errno(status);
bail_commit:
ocfs2_commit_trans(osb, handle);
bail_unlock:
- ocfs2_meta_unlock(inode, 1);
+ for (qtype = 0; qtype < MAXQUOTAS; qtype++) {
+ if (!locked[qtype])
+ continue;
+ oinfo = sb_dqinfo(sb, qtype)->dqi_priv;
+ ocfs2_unlock_global_qf(oinfo, 1);
+ }
+ ocfs2_inode_unlock(inode, 1);
bail_unlock_rw:
if (size_change)
ocfs2_rw_unlock(inode, 1);
bail:
- if (bh)
- brelse(bh);
+ brelse(bh);
+
+ if (!status && attr->ia_valid & ATTR_MODE) {
+ status = ocfs2_acl_chmod(inode);
+ if (status < 0)
+ mlog_errno(status);
+ }
mlog_exit(status);
return status;
return err;
}
-int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
+int ocfs2_permission(struct inode *inode, int mask)
{
int ret;
mlog_entry_void();
- ret = ocfs2_meta_lock(inode, NULL, 0);
+ ret = ocfs2_inode_lock(inode, NULL, 0);
if (ret) {
if (ret != -ENOENT)
mlog_errno(ret);
goto out;
}
- ret = generic_permission(inode, mask, NULL);
+ ret = generic_permission(inode, mask, ocfs2_check_acl);
- ocfs2_meta_unlock(inode, 0);
+ ocfs2_inode_unlock(inode, 0);
out:
mlog_exit(ret);
return ret;
}
-static int ocfs2_write_remove_suid(struct inode *inode)
+static int __ocfs2_write_remove_suid(struct inode *inode,
+ struct buffer_head *bh)
{
int ret;
- struct buffer_head *bh = NULL;
- struct ocfs2_inode_info *oi = OCFS2_I(inode);
handle_t *handle;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di;
mlog_entry("(Inode %llu, mode 0%o)\n",
- (unsigned long long)oi->ip_blkno, inode->i_mode);
+ (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
- if (handle == NULL) {
- ret = -ENOMEM;
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
mlog_errno(ret);
goto out;
}
- ret = ocfs2_read_block(osb, oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
+ ret = ocfs2_journal_access_di(handle, inode, bh,
+ OCFS2_JOURNAL_ACCESS_WRITE);
if (ret < 0) {
mlog_errno(ret);
goto out_trans;
}
- ret = ocfs2_journal_access(handle, inode, bh,
- OCFS2_JOURNAL_ACCESS_WRITE);
- if (ret < 0) {
- mlog_errno(ret);
- goto out_bh;
- }
-
inode->i_mode &= ~S_ISUID;
if ((inode->i_mode & S_ISGID) && (inode->i_mode & S_IXGRP))
inode->i_mode &= ~S_ISGID;
ret = ocfs2_journal_dirty(handle, bh);
if (ret < 0)
mlog_errno(ret);
-out_bh:
- brelse(bh);
+
out_trans:
ocfs2_commit_trans(osb, handle);
out:
size_t count)
{
int ret = 0;
+ unsigned int extent_flags;
u32 cpos, clusters, extent_len, phys_cpos;
struct super_block *sb = inode->i_sb;
clusters = ocfs2_clusters_for_bytes(sb, pos + count) - cpos;
while (clusters) {
- ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len);
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &extent_len,
+ &extent_flags);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
- if (phys_cpos == 0) {
+ if (phys_cpos == 0 || (extent_flags & OCFS2_EXT_UNWRITTEN)) {
ret = 1;
break;
}
return ret;
}
-static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
- loff_t *ppos,
- size_t count,
- int appending,
- int *direct_io)
+static int ocfs2_write_remove_suid(struct inode *inode)
{
- int ret = 0, meta_level = appending;
- struct inode *inode = dentry->d_inode;
- u32 clusters;
- loff_t newsize, saved_pos;
+ int ret;
+ struct buffer_head *bh = NULL;
- /*
- * We sample i_size under a read level meta lock to see if our write
- * is extending the file, if it is we back off and get a write level
- * meta lock.
- */
- for(;;) {
- ret = ocfs2_meta_lock(inode, NULL, meta_level);
- if (ret < 0) {
- meta_level = -1;
+ ret = ocfs2_read_inode_block(inode, &bh);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = __ocfs2_write_remove_suid(inode, bh);
+out:
+ brelse(bh);
+ return ret;
+}
+
+/*
+ * Allocate enough extents to cover the region starting at byte offset
+ * start for len bytes. Existing extents are skipped, any extents
+ * added are marked as "unwritten".
+ */
+static int ocfs2_allocate_unwritten_extents(struct inode *inode,
+ u64 start, u64 len)
+{
+ int ret;
+ u32 cpos, phys_cpos, clusters, alloc_size;
+ u64 end = start + len;
+ struct buffer_head *di_bh = NULL;
+
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ ret = ocfs2_read_inode_block(inode, &di_bh);
+ if (ret) {
mlog_errno(ret);
goto out;
}
- /* Clear suid / sgid if necessary. We do this here
- * instead of later in the write path because
- * remove_suid() calls ->setattr without any hint that
- * we may have already done our cluster locking. Since
- * ocfs2_setattr() *must* take cluster locks to
- * proceeed, this will lead us to recursively lock the
- * inode. There's also the dinode i_size state which
- * can be lost via setattr during extending writes (we
- * set inode->i_size at the end of a write. */
- if (should_remove_suid(dentry)) {
- if (meta_level == 0) {
- ocfs2_meta_unlock(inode, meta_level);
- meta_level = 1;
- continue;
- }
+ /*
+ * Nothing to do if the requested reservation range
+ * fits within the inode.
+ */
+ if (ocfs2_size_fits_inline_data(di_bh, end))
+ goto out;
- ret = ocfs2_write_remove_suid(inode);
- if (ret < 0) {
- mlog_errno(ret);
- goto out_unlock;
- }
+ ret = ocfs2_convert_inline_data_to_extents(inode, di_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
}
+ }
- /* work on a copy of ppos until we're sure that we won't have
- * to recalculate it due to relocking. */
- if (appending) {
- saved_pos = i_size_read(inode);
- mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
- } else {
- saved_pos = *ppos;
- }
+ /*
+ * We consider both start and len to be inclusive.
+ */
+ cpos = start >> OCFS2_SB(inode->i_sb)->s_clustersize_bits;
+ clusters = ocfs2_clusters_for_bytes(inode->i_sb, start + len);
+ clusters -= cpos;
- if (ocfs2_sparse_alloc(OCFS2_SB(inode->i_sb))) {
- loff_t end = saved_pos + count;
+ while (clusters) {
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+ &alloc_size, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
- /*
- * Skip the O_DIRECT checks if we don't need
- * them.
- */
- if (!direct_io || !(*direct_io))
- break;
+ /*
+ * Hole or existing extent len can be arbitrary, so
+ * cap it to our own allocation request.
+ */
+ if (alloc_size > clusters)
+ alloc_size = clusters;
+ if (phys_cpos) {
/*
- * Allowing concurrent direct writes means
- * i_size changes wouldn't be synchronized, so
- * one node could wind up truncating another
- * nodes writes.
+ * We already have an allocation at this
+ * region so we can safely skip it.
*/
- if (end > i_size_read(inode)) {
- *direct_io = 0;
- break;
- }
+ goto next;
+ }
- /*
- * We don't fill holes during direct io, so
- * check for them here. If any are found, the
- * caller will have to retake some cluster
- * locks and initiate the io as buffered.
- */
- ret = ocfs2_check_range_for_holes(inode, saved_pos,
- count);
- if (ret == 1) {
- *direct_io = 0;
- ret = 0;
- } else if (ret < 0)
+ ret = __ocfs2_extend_allocation(inode, cpos, alloc_size, 1);
+ if (ret) {
+ if (ret != -ENOSPC)
mlog_errno(ret);
- break;
+ goto out;
}
- /*
- * The rest of this loop is concerned with legacy file
- * systems which don't support sparse files.
- */
+next:
+ cpos += alloc_size;
+ clusters -= alloc_size;
+ }
- newsize = count + saved_pos;
+ ret = 0;
+out:
- mlog(0, "pos=%lld newsize=%lld cursize=%lld\n",
- (long long) saved_pos, (long long) newsize,
- (long long) i_size_read(inode));
+ brelse(di_bh);
+ return ret;
+}
- /* No need for a higher level metadata lock if we're
- * never going past i_size. */
- if (newsize <= i_size_read(inode))
- break;
+/*
+ * Truncate a byte range, avoiding pages within partial clusters. This
+ * preserves those pages for the zeroing code to write to.
+ */
+static void ocfs2_truncate_cluster_pages(struct inode *inode, u64 byte_start,
+ u64 byte_len)
+{
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ loff_t start, end;
+ struct address_space *mapping = inode->i_mapping;
- if (meta_level == 0) {
- ocfs2_meta_unlock(inode, meta_level);
- meta_level = 1;
- continue;
- }
+ start = (loff_t)ocfs2_align_bytes_to_clusters(inode->i_sb, byte_start);
+ end = byte_start + byte_len;
+ end = end & ~(osb->s_clustersize - 1);
- spin_lock(&OCFS2_I(inode)->ip_lock);
- clusters = ocfs2_clusters_for_bytes(inode->i_sb, newsize) -
- OCFS2_I(inode)->ip_clusters;
- spin_unlock(&OCFS2_I(inode)->ip_lock);
+ if (start < end) {
+ unmap_mapping_range(mapping, start, end - start, 0);
+ truncate_inode_pages_range(mapping, start, end - 1);
+ }
+}
- mlog(0, "Writing at EOF, may need more allocation: "
- "i_size = %lld, newsize = %lld, need %u clusters\n",
- (long long) i_size_read(inode), (long long) newsize,
- clusters);
+static int ocfs2_zero_partial_clusters(struct inode *inode,
+ u64 start, u64 len)
+{
+ int ret = 0;
+ u64 tmpend, end = start + len;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ unsigned int csize = osb->s_clustersize;
+ handle_t *handle;
- /* We only want to continue the rest of this loop if
- * our extend will actually require more
- * allocation. */
- if (!clusters)
- break;
+ /*
+ * The "start" and "end" values are NOT necessarily part of
+ * the range whose allocation is being deleted. Rather, this
+ * is what the user passed in with the request. We must zero
+ * partial clusters here. There's no need to worry about
+ * physical allocation - the zeroing code knows to skip holes.
+ */
+ mlog(0, "byte start: %llu, end: %llu\n",
+ (unsigned long long)start, (unsigned long long)end);
- ret = ocfs2_extend_file(inode, NULL, newsize, count);
- if (ret < 0) {
- if (ret != -ENOSPC)
- mlog_errno(ret);
- goto out_unlock;
- }
- break;
+ /*
+ * If both edges are on a cluster boundary then there's no
+ * zeroing required as the region is part of the allocation to
+ * be truncated.
+ */
+ if ((start & (csize - 1)) == 0 && (end & (csize - 1)) == 0)
+ goto out;
+
+ handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out;
}
- if (appending)
- *ppos = saved_pos;
+ /*
+ * We want to get the byte offset of the end of the 1st cluster.
+ */
+ tmpend = (u64)osb->s_clustersize + (start & ~(osb->s_clustersize - 1));
+ if (tmpend > end)
+ tmpend = end;
-out_unlock:
- ocfs2_meta_unlock(inode, meta_level);
+ mlog(0, "1st range: start: %llu, tmpend: %llu\n",
+ (unsigned long long)start, (unsigned long long)tmpend);
+
+ ret = ocfs2_zero_range_for_truncate(inode, handle, start, tmpend);
+ if (ret)
+ mlog_errno(ret);
+
+ if (tmpend < end) {
+ /*
+ * This may make start and end equal, but the zeroing
+ * code will skip any work in that case so there's no
+ * need to catch it up here.
+ */
+ start = end & ~(osb->s_clustersize - 1);
+
+ mlog(0, "2nd range: start: %llu, end: %llu\n",
+ (unsigned long long)start, (unsigned long long)end);
+
+ ret = ocfs2_zero_range_for_truncate(inode, handle, start, end);
+ if (ret)
+ mlog_errno(ret);
+ }
+ ocfs2_commit_trans(osb, handle);
out:
return ret;
}
-static inline void
-ocfs2_set_next_iovec(const struct iovec **iovp, size_t *basep, size_t bytes)
+static int ocfs2_remove_inode_range(struct inode *inode,
+ struct buffer_head *di_bh, u64 byte_start,
+ u64 byte_len)
{
- const struct iovec *iov = *iovp;
- size_t base = *basep;
+ int ret = 0;
+ u32 trunc_start, trunc_len, cpos, phys_cpos, alloc_size;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_cached_dealloc_ctxt dealloc;
+ struct address_space *mapping = inode->i_mapping;
+ struct ocfs2_extent_tree et;
+
+ ocfs2_init_dinode_extent_tree(&et, inode, di_bh);
+ ocfs2_init_dealloc_ctxt(&dealloc);
- do {
- int copy = min(bytes, iov->iov_len - base);
+ if (byte_len == 0)
+ return 0;
- bytes -= copy;
- base += copy;
- if (iov->iov_len == base) {
- iov++;
- base = 0;
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ ret = ocfs2_truncate_inline(inode, di_bh, byte_start,
+ byte_start + byte_len, 0);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
}
- } while (bytes);
- *iovp = iov;
- *basep = base;
+ /*
+ * There's no need to get fancy with the page cache
+ * truncate of an inline-data inode. We're talking
+ * about less than a page here, which will be cached
+ * in the dinode buffer anyway.
+ */
+ unmap_mapping_range(mapping, 0, 0, 0);
+ truncate_inode_pages(mapping, 0);
+ goto out;
+ }
+
+ trunc_start = ocfs2_clusters_for_bytes(osb->sb, byte_start);
+ trunc_len = (byte_start + byte_len) >> osb->s_clustersize_bits;
+ if (trunc_len >= trunc_start)
+ trunc_len -= trunc_start;
+ else
+ trunc_len = 0;
+
+ mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u\n",
+ (unsigned long long)OCFS2_I(inode)->ip_blkno,
+ (unsigned long long)byte_start,
+ (unsigned long long)byte_len, trunc_start, trunc_len);
+
+ ret = ocfs2_zero_partial_clusters(inode, byte_start, byte_len);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ cpos = trunc_start;
+ while (trunc_len) {
+ ret = ocfs2_get_clusters(inode, cpos, &phys_cpos,
+ &alloc_size, NULL);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ if (alloc_size > trunc_len)
+ alloc_size = trunc_len;
+
+ /* Only do work for non-holes */
+ if (phys_cpos != 0) {
+ ret = ocfs2_remove_btree_range(inode, &et, cpos,
+ phys_cpos, alloc_size,
+ &dealloc);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+ }
+
+ cpos += alloc_size;
+ trunc_len -= alloc_size;
+ }
+
+ ocfs2_truncate_cluster_pages(inode, byte_start, byte_len);
+
+out:
+ ocfs2_schedule_truncate_log_flush(osb, 1);
+ ocfs2_run_deallocs(osb, &dealloc);
+
+ return ret;
}
-static struct page * ocfs2_get_write_source(struct ocfs2_buffered_write_priv *bp,
- const struct iovec *cur_iov,
- size_t iov_offset)
+/*
+ * Parts of this function taken from xfs_change_file_space()
+ */
+static int __ocfs2_change_file_space(struct file *file, struct inode *inode,
+ loff_t f_pos, unsigned int cmd,
+ struct ocfs2_space_resv *sr,
+ int change_size)
{
int ret;
- char *buf;
- struct page *src_page = NULL;
+ s64 llen;
+ loff_t size;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct buffer_head *di_bh = NULL;
+ handle_t *handle;
+ unsigned long long max_off = inode->i_sb->s_maxbytes;
+
+ if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
+ return -EROFS;
+
+ mutex_lock(&inode->i_mutex);
+
+ /*
+ * This prevents concurrent writes on other nodes
+ */
+ ret = ocfs2_rw_lock(inode, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out;
+ }
+
+ ret = ocfs2_inode_lock(inode, &di_bh, 1);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_rw_unlock;
+ }
+
+ if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
+ ret = -EPERM;
+ goto out_inode_unlock;
+ }
+
+ switch (sr->l_whence) {
+ case 0: /*SEEK_SET*/
+ break;
+ case 1: /*SEEK_CUR*/
+ sr->l_start += f_pos;
+ break;
+ case 2: /*SEEK_END*/
+ sr->l_start += i_size_read(inode);
+ break;
+ default:
+ ret = -EINVAL;
+ goto out_inode_unlock;
+ }
+ sr->l_whence = 0;
- buf = cur_iov->iov_base + iov_offset;
+ llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
- if (!segment_eq(get_fs(), KERNEL_DS)) {
+ if (sr->l_start < 0
+ || sr->l_start > max_off
+ || (sr->l_start + llen) < 0
+ || (sr->l_start + llen) > max_off) {
+ ret = -EINVAL;
+ goto out_inode_unlock;
+ }
+ size = sr->l_start + sr->l_len;
+
+ if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
+ if (sr->l_len <= 0) {
+ ret = -EINVAL;
+ goto out_inode_unlock;
+ }
+ }
+
+ if (file && should_remove_suid(file->f_path.dentry)) {
+ ret = __ocfs2_write_remove_suid(inode, di_bh);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_inode_unlock;
+ }
+ }
+
+ down_write(&OCFS2_I(inode)->ip_alloc_sem);
+ switch (cmd) {
+ case OCFS2_IOC_RESVSP:
+ case OCFS2_IOC_RESVSP64:
/*
- * Pull in the user page. We want to do this outside
- * of the meta data locks in order to preserve locking
- * order in case of page fault.
+ * This takes unsigned offsets, but the signed ones we
+ * pass have been checked against overflow above.
*/
- ret = get_user_pages(current, current->mm,
- (unsigned long)buf & PAGE_CACHE_MASK, 1,
- 0, 0, &src_page, NULL);
- if (ret == 1)
- bp->b_src_buf = kmap(src_page);
- else
- src_page = ERR_PTR(-EFAULT);
- } else {
- bp->b_src_buf = buf;
+ ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
+ sr->l_len);
+ break;
+ case OCFS2_IOC_UNRESVSP:
+ case OCFS2_IOC_UNRESVSP64:
+ ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
+ sr->l_len);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ up_write(&OCFS2_I(inode)->ip_alloc_sem);
+ if (ret) {
+ mlog_errno(ret);
+ goto out_inode_unlock;
}
- return src_page;
+ /*
+ * We update c/mtime for these changes
+ */
+ handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
+ if (IS_ERR(handle)) {
+ ret = PTR_ERR(handle);
+ mlog_errno(ret);
+ goto out_inode_unlock;
+ }
+
+ if (change_size && i_size_read(inode) < size)
+ i_size_write(inode, size);
+
+ inode->i_ctime = inode->i_mtime = CURRENT_TIME;
+ ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
+ if (ret < 0)
+ mlog_errno(ret);
+
+ ocfs2_commit_trans(osb, handle);
+
+out_inode_unlock:
+ brelse(di_bh);
+ ocfs2_inode_unlock(inode, 1);
+out_rw_unlock:
+ ocfs2_rw_unlock(inode, 1);
+
+out:
+ mutex_unlock(&inode->i_mutex);
+ return ret;
}
-static void ocfs2_put_write_source(struct ocfs2_buffered_write_priv *bp,
- struct page *page)
+int ocfs2_change_file_space(struct file *file, unsigned int cmd,
+ struct ocfs2_space_resv *sr)
{
- if (page) {
- kunmap(page);
- page_cache_release(page);
- }
+ struct inode *inode = file->f_path.dentry->d_inode;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+ if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
+ !ocfs2_writes_unwritten_extents(osb))
+ return -ENOTTY;
+ else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
+ !ocfs2_sparse_alloc(osb))
+ return -ENOTTY;
+
+ if (!S_ISREG(inode->i_mode))
+ return -EINVAL;
+
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EBADF;
+
+ return __ocfs2_change_file_space(file, inode, file->f_pos, cmd, sr, 0);
}
-static ssize_t ocfs2_file_buffered_write(struct file *file, loff_t *ppos,
- const struct iovec *iov,
- unsigned long nr_segs,
- size_t count,
- ssize_t o_direct_written)
+static long ocfs2_fallocate(struct inode *inode, int mode, loff_t offset,
+ loff_t len)
{
- int ret = 0;
- ssize_t copied, total = 0;
- size_t iov_offset = 0;
- const struct iovec *cur_iov = iov;
- struct ocfs2_buffered_write_priv bp;
- struct page *page;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+ struct ocfs2_space_resv sr;
+ int change_size = 1;
- /*
- * handle partial DIO write. Adjust cur_iov if needed.
- */
- ocfs2_set_next_iovec(&cur_iov, &iov_offset, o_direct_written);
+ if (!ocfs2_writes_unwritten_extents(osb))
+ return -EOPNOTSUPP;
- do {
- bp.b_cur_off = iov_offset;
- bp.b_cur_iov = cur_iov;
+ if (S_ISDIR(inode->i_mode))
+ return -ENODEV;
- page = ocfs2_get_write_source(&bp, cur_iov, iov_offset);
- if (IS_ERR(page)) {
- ret = PTR_ERR(page);
- goto out;
- }
+ if (mode & FALLOC_FL_KEEP_SIZE)
+ change_size = 0;
- copied = ocfs2_buffered_write_cluster(file, *ppos, count,
- ocfs2_map_and_write_user_data,
- &bp);
+ sr.l_whence = 0;
+ sr.l_start = (s64)offset;
+ sr.l_len = (s64)len;
- ocfs2_put_write_source(&bp, page);
+ return __ocfs2_change_file_space(NULL, inode, offset,
+ OCFS2_IOC_RESVSP64, &sr, change_size);
+}
- if (copied < 0) {
- mlog_errno(copied);
- ret = copied;
+static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
+ loff_t *ppos,
+ size_t count,
+ int appending,
+ int *direct_io)
+{
+ int ret = 0, meta_level = 0;
+ struct inode *inode = dentry->d_inode;
+ loff_t saved_pos, end;
+
+ /*
+ * We start with a read level meta lock and only jump to an ex
+ * if we need to make modifications here.
+ */
+ for(;;) {
+ ret = ocfs2_inode_lock(inode, NULL, meta_level);
+ if (ret < 0) {
+ meta_level = -1;
+ mlog_errno(ret);
goto out;
}
- total += copied;
- *ppos = *ppos + copied;
- count -= copied;
+ /* Clear suid / sgid if necessary. We do this here
+ * instead of later in the write path because
+ * remove_suid() calls ->setattr without any hint that
+ * we may have already done our cluster locking. Since
+ * ocfs2_setattr() *must* take cluster locks to
+ * proceeed, this will lead us to recursively lock the
+ * inode. There's also the dinode i_size state which
+ * can be lost via setattr during extending writes (we
+ * set inode->i_size at the end of a write. */
+ if (should_remove_suid(dentry)) {
+ if (meta_level == 0) {
+ ocfs2_inode_unlock(inode, meta_level);
+ meta_level = 1;
+ continue;
+ }
- ocfs2_set_next_iovec(&cur_iov, &iov_offset, copied);
- } while(count);
+ ret = ocfs2_write_remove_suid(inode);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto out_unlock;
+ }
+ }
-out:
- return total ? total : ret;
-}
+ /* work on a copy of ppos until we're sure that we won't have
+ * to recalculate it due to relocking. */
+ if (appending) {
+ saved_pos = i_size_read(inode);
+ mlog(0, "O_APPEND: inode->i_size=%llu\n", saved_pos);
+ } else {
+ saved_pos = *ppos;
+ }
-static int ocfs2_check_iovec(const struct iovec *iov, size_t *counted,
- unsigned long *nr_segs)
-{
- size_t ocount; /* original count */
- unsigned long seg;
+ end = saved_pos + count;
- ocount = 0;
- for (seg = 0; seg < *nr_segs; seg++) {
- const struct iovec *iv = &iov[seg];
+ /*
+ * Skip the O_DIRECT checks if we don't need
+ * them.
+ */
+ if (!direct_io || !(*direct_io))
+ break;
/*
- * If any segment has a negative length, or the cumulative
- * length ever wraps negative then return -EINVAL.
+ * There's no sane way to do direct writes to an inode
+ * with inline data.
*/
- ocount += iv->iov_len;
- if (unlikely((ssize_t)(ocount|iv->iov_len) < 0))
- return -EINVAL;
- if (access_ok(VERIFY_READ, iv->iov_base, iv->iov_len))
- continue;
- if (seg == 0)
- return -EFAULT;
- *nr_segs = seg;
- ocount -= iv->iov_len; /* This segment is no good */
+ if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) {
+ *direct_io = 0;
+ break;
+ }
+
+ /*
+ * Allowing concurrent direct writes means
+ * i_size changes wouldn't be synchronized, so
+ * one node could wind up truncating another
+ * nodes writes.
+ */
+ if (end > i_size_read(inode)) {
+ *direct_io = 0;
+ break;
+ }
+
+ /*
+ * We don't fill holes during direct io, so
+ * check for them here. If any are found, the
+ * caller will have to retake some cluster
+ * locks and initiate the io as buffered.
+ */
+ ret = ocfs2_check_range_for_holes(inode, saved_pos, count);
+ if (ret == 1) {
+ *direct_io = 0;
+ ret = 0;
+ } else if (ret < 0)
+ mlog_errno(ret);
break;
}
- *counted = ocount;
- return 0;
+ if (appending)
+ *ppos = saved_pos;
+
+out_unlock:
+ ocfs2_inode_unlock(inode, meta_level);
+
+out:
+ return ret;
}
static ssize_t ocfs2_file_aio_write(struct kiocb *iocb,
loff_t pos)
{
int ret, direct_io, appending, rw_level, have_alloc_sem = 0;
- int can_do_direct, sync = 0;
+ int can_do_direct;
ssize_t written = 0;
size_t ocount; /* original count */
size_t count; /* after file limit checks */
- loff_t *ppos = &iocb->ki_pos;
+ loff_t old_size, *ppos = &iocb->ki_pos;
+ u32 old_clusters;
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_path.dentry->d_inode;
+ struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
mlog_entry("(0x%p, %u, '%.*s')\n", file,
(unsigned int)nr_segs,
if (iocb->ki_left == 0)
return 0;
- ret = ocfs2_check_iovec(iov, &ocount, &nr_segs);
- if (ret)
- return ret;
-
- count = ocount;
-
vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE);
appending = file->f_flags & O_APPEND ? 1 : 0;
rw_level = -1;
direct_io = 0;
- sync = 1;
goto relock;
}
- if (!sync && ((file->f_flags & O_SYNC) || IS_SYNC(inode)))
- sync = 1;
-
/*
- * XXX: Is it ok to execute these checks a second time?
- */
- ret = generic_write_checks(file, ppos, &count, S_ISBLK(inode->i_mode));
- if (ret)
- goto out;
-
- /*
- * Set pos so that sync_page_range_nolock() below understands
- * where to start from. We might've moved it around via the
- * calls above. The range we want to actually sync starts from
- * *ppos here.
- *
+ * To later detect whether a journal commit for sync writes is
+ * necessary, we sample i_size, and cluster count here.
*/
- pos = *ppos;
+ old_size = i_size_read(inode);
+ old_clusters = OCFS2_I(inode)->ip_clusters;
/* communicate with ocfs2_dio_end_io */
- ocfs2_iocb_set_rw_locked(iocb);
+ ocfs2_iocb_set_rw_locked(iocb, rw_level);
if (direct_io) {
+ ret = generic_segment_checks(iov, &nr_segs, &ocount,
+ VERIFY_READ);
+ if (ret)
+ goto out_dio;
+
+ ret = generic_write_checks(file, ppos, &count,
+ S_ISBLK(inode->i_mode));
+ if (ret)
+ goto out_dio;
+
written = generic_file_direct_write(iocb, iov, &nr_segs, *ppos,
ppos, count, ocount);
if (written < 0) {
+ /*
+ * direct write may have instantiated a few
+ * blocks outside i_size. Trim these off again.
+ * Don't need i_size_read because we hold i_mutex.
+ */
+ if (*ppos + count > inode->i_size)
+ vmtruncate(inode, inode->i_size);
ret = written;
goto out_dio;
}
} else {
- written = ocfs2_file_buffered_write(file, ppos, iov, nr_segs,
- count, written);
- if (written < 0) {
- ret = written;
- if (ret != -EFAULT || ret != -ENOSPC)
- mlog_errno(ret);
- goto out;
- }
+ written = generic_file_aio_write_nolock(iocb, iov, nr_segs,
+ *ppos);
}
out_dio:
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(file->f_flags & O_DIRECT));
+ if ((file->f_flags & O_SYNC && !direct_io) || IS_SYNC(inode)) {
+ /*
+ * The generic write paths have handled getting data
+ * to disk, but since we don't make use of the dirty
+ * inode list, a manual journal commit is necessary
+ * here.
+ */
+ if (old_size != i_size_read(inode) ||
+ old_clusters != OCFS2_I(inode)->ip_clusters) {
+ ret = jbd2_journal_force_commit(osb->journal->j_journal);
+ if (ret < 0)
+ written = ret;
+ }
+ }
+
/*
* deep in g_f_a_w_n()->ocfs2_direct_IO we pass in a ocfs2_dio_end_io
* function pointer which is called when o_direct io completes so that
if (have_alloc_sem)
up_read(&inode->i_alloc_sem);
- if (written > 0 && sync) {
- ssize_t err;
-
- err = sync_page_range_nolock(inode, file->f_mapping, pos, count);
- if (err < 0)
- written = err;
- }
-
mutex_unlock(&inode->i_mutex);
mlog_exit(ret);
return written ? written : ret;
}
-static int ocfs2_splice_write_actor(struct pipe_inode_info *pipe,
- struct pipe_buffer *buf,
- struct splice_desc *sd)
-{
- int ret, count, total = 0;
- ssize_t copied = 0;
- struct ocfs2_splice_write_priv sp;
-
- ret = buf->ops->pin(pipe, buf);
- if (ret)
- goto out;
-
- sp.s_sd = sd;
- sp.s_buf = buf;
- sp.s_pipe = pipe;
- sp.s_offset = sd->pos & ~PAGE_CACHE_MASK;
- sp.s_buf_offset = buf->offset;
-
- count = sd->len;
- if (count + sp.s_offset > PAGE_CACHE_SIZE)
- count = PAGE_CACHE_SIZE - sp.s_offset;
-
- do {
- /*
- * splice wants us to copy up to one page at a
- * time. For pagesize > cluster size, this means we
- * might enter ocfs2_buffered_write_cluster() more
- * than once, so keep track of our progress here.
- */
- copied = ocfs2_buffered_write_cluster(sd->file,
- (loff_t)sd->pos + total,
- count,
- ocfs2_map_and_write_splice_data,
- &sp);
- if (copied < 0) {
- mlog_errno(copied);
- ret = copied;
- goto out;
- }
-
- count -= copied;
- sp.s_offset += copied;
- sp.s_buf_offset += copied;
- total += copied;
- } while (count);
-
- ret = 0;
-out:
-
- return total ? total : ret;
-}
-
-static ssize_t __ocfs2_file_splice_write(struct pipe_inode_info *pipe,
- struct file *out,
- loff_t *ppos,
- size_t len,
- unsigned int flags)
-{
- int ret, err;
- struct address_space *mapping = out->f_mapping;
- struct inode *inode = mapping->host;
-
- ret = __splice_from_pipe(pipe, out, ppos, len, flags,
- ocfs2_splice_write_actor);
- if (ret > 0) {
- *ppos += ret;
-
- if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
- err = generic_osync_inode(inode, mapping,
- OSYNC_METADATA|OSYNC_DATA);
- if (err)
- ret = err;
- }
- }
-
- return ret;
-}
-
static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
struct file *out,
loff_t *ppos,
goto out_unlock;
}
- /* ok, we're done with i_size and alloc work */
- ret = __ocfs2_file_splice_write(pipe, out, ppos, len, flags);
+ ret = generic_file_splice_write_nolock(pipe, out, ppos, len, flags);
out_unlock:
ocfs2_rw_unlock(inode, 1);
/*
* See the comment in ocfs2_file_aio_read()
*/
- ret = ocfs2_meta_lock(inode, NULL, 0);
+ ret = ocfs2_inode_lock(inode, NULL, 0);
if (ret < 0) {
mlog_errno(ret);
goto bail;
}
- ocfs2_meta_unlock(inode, 0);
+ ocfs2_inode_unlock(inode, 0);
ret = generic_file_splice_read(in, ppos, pipe, len, flags);
}
rw_level = 0;
/* communicate with ocfs2_dio_end_io */
- ocfs2_iocb_set_rw_locked(iocb);
+ ocfs2_iocb_set_rw_locked(iocb, rw_level);
}
/*
* like i_size. This allows the checks down below
* generic_file_aio_read() a chance of actually working.
*/
- ret = ocfs2_meta_lock_atime(inode, filp->f_vfsmnt, &lock_level);
+ ret = ocfs2_inode_lock_atime(inode, filp->f_vfsmnt, &lock_level);
if (ret < 0) {
mlog_errno(ret);
goto bail;
}
- ocfs2_meta_unlock(inode, lock_level);
+ ocfs2_inode_unlock(inode, lock_level);
ret = generic_file_aio_read(iocb, iov, nr_segs, iocb->ki_pos);
if (ret == -EINVAL)
- mlog(ML_ERROR, "generic_file_aio_read returned -EINVAL\n");
+ mlog(0, "generic_file_aio_read returned -EINVAL\n");
/* buffered aio wouldn't have proper lock coverage today */
BUG_ON(ret == -EIOCBQUEUED && !(filp->f_flags & O_DIRECT));
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
+ .setxattr = generic_setxattr,
+ .getxattr = generic_getxattr,
+ .listxattr = ocfs2_listxattr,
+ .removexattr = generic_removexattr,
+ .fallocate = ocfs2_fallocate,
+ .fiemap = ocfs2_fiemap,
};
const struct inode_operations ocfs2_special_file_iops = {
.permission = ocfs2_permission,
};
+/*
+ * Other than ->lock, keep ocfs2_fops and ocfs2_dops in sync with
+ * ocfs2_fops_no_plocks and ocfs2_dops_no_plocks!
+ */
const struct file_operations ocfs2_fops = {
+ .llseek = generic_file_llseek,
.read = do_sync_read,
.write = do_sync_write,
- .sendfile = generic_file_sendfile,
.mmap = ocfs2_mmap,
.fsync = ocfs2_sync_file,
.release = ocfs2_file_release,
.open = ocfs2_file_open,
.aio_read = ocfs2_file_aio_read,
.aio_write = ocfs2_file_aio_write,
- .ioctl = ocfs2_ioctl,
+ .unlocked_ioctl = ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ocfs2_compat_ioctl,
+#endif
+ .lock = ocfs2_lock,
+ .flock = ocfs2_flock,
.splice_read = ocfs2_file_splice_read,
.splice_write = ocfs2_file_splice_write,
};
const struct file_operations ocfs2_dops = {
+ .llseek = generic_file_llseek,
+ .read = generic_read_dir,
+ .readdir = ocfs2_readdir,
+ .fsync = ocfs2_sync_file,
+ .release = ocfs2_dir_release,
+ .open = ocfs2_dir_open,
+ .unlocked_ioctl = ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ocfs2_compat_ioctl,
+#endif
+ .lock = ocfs2_lock,
+ .flock = ocfs2_flock,
+};
+
+/*
+ * POSIX-lockless variants of our file_operations.
+ *
+ * These will be used if the underlying cluster stack does not support
+ * posix file locking, if the user passes the "localflocks" mount
+ * option, or if we have a local-only fs.
+ *
+ * ocfs2_flock is in here because all stacks handle UNIX file locks,
+ * so we still want it in the case of no stack support for
+ * plocks. Internally, it will do the right thing when asked to ignore
+ * the cluster.
+ */
+const struct file_operations ocfs2_fops_no_plocks = {
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .write = do_sync_write,
+ .mmap = ocfs2_mmap,
+ .fsync = ocfs2_sync_file,
+ .release = ocfs2_file_release,
+ .open = ocfs2_file_open,
+ .aio_read = ocfs2_file_aio_read,
+ .aio_write = ocfs2_file_aio_write,
+ .unlocked_ioctl = ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ocfs2_compat_ioctl,
+#endif
+ .flock = ocfs2_flock,
+ .splice_read = ocfs2_file_splice_read,
+ .splice_write = ocfs2_file_splice_write,
+};
+
+const struct file_operations ocfs2_dops_no_plocks = {
+ .llseek = generic_file_llseek,
.read = generic_read_dir,
.readdir = ocfs2_readdir,
.fsync = ocfs2_sync_file,
- .ioctl = ocfs2_ioctl,
+ .release = ocfs2_dir_release,
+ .open = ocfs2_dir_open,
+ .unlocked_ioctl = ocfs2_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ocfs2_compat_ioctl,
+#endif
+ .flock = ocfs2_flock,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff