#include "xfs_itable.h"
#include "xfs_rw.h"
#include "xfs_acl.h"
-#include "xfs_cap.h"
-#include "xfs_mac.h"
#include "xfs_attr.h"
#include "xfs_inode_item.h"
#include "xfs_buf_item.h"
xfs_iozero(
struct inode *ip, /* inode */
loff_t pos, /* offset in file */
- size_t count, /* size of data to zero */
- loff_t end_size) /* max file size to set */
+ size_t count) /* size of data to zero */
{
unsigned bytes;
struct page *page;
struct address_space *mapping;
- char *kaddr;
int status;
mapping = ip->i_mapping;
if (!page)
break;
- kaddr = kmap(page);
status = mapping->a_ops->prepare_write(NULL, page, offset,
offset + bytes);
- if (status) {
+ if (status)
goto unlock;
- }
- memset((void *) (kaddr + offset), 0, bytes);
- flush_dcache_page(page);
+ zero_user_page(page, offset, bytes, KM_USER0);
+
status = mapping->a_ops->commit_write(NULL, page, offset,
offset + bytes);
if (!status) {
pos += bytes;
count -= bytes;
- if (pos > i_size_read(ip))
- i_size_write(ip, pos < end_size ? pos : end_size);
}
unlock:
- kunmap(page);
unlock_page(page);
page_cache_release(page);
if (status)
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
size_t size = 0;
- ssize_t ret;
+ ssize_t ret = 0;
xfs_fsize_t n;
xfs_inode_t *ip;
xfs_mount_t *mp;
mp->m_rtdev_targp : mp->m_ddev_targp;
if ((*offset & target->bt_smask) ||
(size & target->bt_smask)) {
- if (*offset == ip->i_d.di_size) {
+ if (*offset == ip->i_size) {
return (0);
}
return -XFS_ERROR(EINVAL);
if (unlikely(ioflags & IO_ISDIRECT)) {
if (VN_CACHED(vp))
- bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
+ ret = bhv_vop_flushinval_pages(vp, ctooff(offtoct(*offset)),
-1, FI_REMAPF_LOCKED);
mutex_unlock(&inode->i_mutex);
+ if (ret) {
+ xfs_iunlock(ip, XFS_IOLOCK_SHARED);
+ return ret;
+ }
}
xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
return ret;
}
-ssize_t
-xfs_sendfile(
- bhv_desc_t *bdp,
- struct file *filp,
- loff_t *offset,
- int ioflags,
- size_t count,
- read_actor_t actor,
- void *target,
- cred_t *credp)
-{
- xfs_inode_t *ip = XFS_BHVTOI(bdp);
- xfs_mount_t *mp = ip->i_mount;
- ssize_t ret;
-
- XFS_STATS_INC(xs_read_calls);
- if (XFS_FORCED_SHUTDOWN(mp))
- return -EIO;
-
- xfs_ilock(ip, XFS_IOLOCK_SHARED);
-
- if (DM_EVENT_ENABLED(BHV_TO_VNODE(bdp)->v_vfsp, ip, DM_EVENT_READ) &&
- (!(ioflags & IO_INVIS))) {
- bhv_vrwlock_t locktype = VRWLOCK_READ;
- int error;
-
- error = XFS_SEND_DATA(mp, DM_EVENT_READ, BHV_TO_VNODE(bdp),
- *offset, count,
- FILP_DELAY_FLAG(filp), &locktype);
- if (error) {
- xfs_iunlock(ip, XFS_IOLOCK_SHARED);
- return -error;
- }
- }
- xfs_rw_enter_trace(XFS_SENDFILE_ENTER, &ip->i_iocore,
- (void *)(unsigned long)target, count, *offset, ioflags);
- ret = generic_file_sendfile(filp, offset, count, actor, target);
- if (ret > 0)
- XFS_STATS_ADD(xs_read_bytes, ret);
-
- xfs_iunlock(ip, XFS_IOLOCK_SHARED);
- return ret;
-}
-
ssize_t
xfs_splice_read(
bhv_desc_t *bdp,
{
xfs_inode_t *ip = XFS_BHVTOI(bdp);
xfs_mount_t *mp = ip->i_mount;
+ xfs_iocore_t *io = &ip->i_iocore;
ssize_t ret;
struct inode *inode = outfilp->f_mapping->host;
- xfs_fsize_t isize;
+ xfs_fsize_t isize, new_size;
XFS_STATS_INC(xs_write_calls);
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
return -error;
}
}
+
+ new_size = *ppos + count;
+
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ if (new_size > ip->i_size)
+ io->io_new_size = new_size;
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+
xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore,
pipe, count, *ppos, ioflags);
ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags);
if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize))
*ppos = isize;
- if (*ppos > ip->i_d.di_size) {
+ if (*ppos > ip->i_size) {
xfs_ilock(ip, XFS_ILOCK_EXCL);
- if (*ppos > ip->i_d.di_size) {
- ip->i_d.di_size = *ppos;
- i_size_write(inode, *ppos);
- ip->i_update_core = 1;
- ip->i_update_size = 1;
- }
+ if (*ppos > ip->i_size)
+ ip->i_size = *ppos;
+ xfs_iunlock(ip, XFS_ILOCK_EXCL);
+ }
+
+ if (io->io_new_size) {
+ xfs_ilock(ip, XFS_ILOCK_EXCL);
+ io->io_new_size = 0;
+ if (ip->i_d.di_size > ip->i_size)
+ ip->i_d.di_size = ip->i_size;
xfs_iunlock(ip, XFS_ILOCK_EXCL);
}
xfs_iunlock(ip, XFS_IOLOCK_EXCL);
xfs_zero_last_block(
struct inode *ip,
xfs_iocore_t *io,
- xfs_fsize_t isize,
- xfs_fsize_t end_size)
+ xfs_fsize_t offset,
+ xfs_fsize_t isize)
{
xfs_fileoff_t last_fsb;
xfs_mount_t *mp = io->io_mount;
int zero_len;
int error = 0;
xfs_bmbt_irec_t imap;
- loff_t loff;
ASSERT(ismrlocked(io->io_lock, MR_UPDATE) != 0);
*/
XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD);
- loff = XFS_FSB_TO_B(mp, last_fsb);
zero_len = mp->m_sb.sb_blocksize - zero_offset;
- error = xfs_iozero(ip, loff + zero_offset, zero_len, end_size);
+ if (isize + zero_len > offset)
+ zero_len = offset - isize;
+ error = xfs_iozero(ip, isize, zero_len);
XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
ASSERT(error >= 0);
bhv_vnode_t *vp,
xfs_iocore_t *io,
xfs_off_t offset, /* starting I/O offset */
- xfs_fsize_t isize, /* current inode size */
- xfs_fsize_t end_size) /* terminal inode size */
+ xfs_fsize_t isize) /* current inode size */
{
struct inode *ip = vn_to_inode(vp);
xfs_fileoff_t start_zero_fsb;
xfs_fileoff_t end_zero_fsb;
xfs_fileoff_t zero_count_fsb;
xfs_fileoff_t last_fsb;
+ xfs_fileoff_t zero_off;
+ xfs_fsize_t zero_len;
xfs_mount_t *mp = io->io_mount;
int nimaps;
int error = 0;
* First handle zeroing the block on which isize resides.
* We only zero a part of that block so it is handled specially.
*/
- error = xfs_zero_last_block(ip, io, isize, end_size);
+ error = xfs_zero_last_block(ip, io, offset, isize);
if (error) {
ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
*/
XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
- error = xfs_iozero(ip,
- XFS_FSB_TO_B(mp, start_zero_fsb),
- XFS_FSB_TO_B(mp, imap.br_blockcount),
- end_size);
+ zero_off = XFS_FSB_TO_B(mp, start_zero_fsb);
+ zero_len = XFS_FSB_TO_B(mp, imap.br_blockcount);
+
+ if ((zero_off + zero_len) > offset)
+ zero_len = offset - zero_off;
+
+ error = xfs_iozero(ip, zero_off, zero_len);
if (error) {
goto out_lock;
}
xfs_fsize_t isize, new_size;
xfs_iocore_t *io;
bhv_vnode_t *vp;
- unsigned long seg;
int iolock;
int eventsent = 0;
bhv_vrwlock_t locktype;
size_t ocount = 0, count;
loff_t pos;
- int need_i_mutex = 1, need_flush = 0;
+ int need_i_mutex;
XFS_STATS_INC(xs_write_calls);
vp = BHV_TO_VNODE(bdp);
xip = XFS_BHVTOI(bdp);
- for (seg = 0; seg < segs; seg++) {
- const struct iovec *iv = &iovp[seg];
-
- /*
- * If any segment has a negative length, or the cumulative
- * length ever wraps negative then return -EINVAL.
- */
- 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;
- segs = seg;
- ocount -= iv->iov_len; /* This segment is no good */
- break;
- }
+ error = generic_segment_checks(iovp, &segs, &ocount, VERIFY_READ);
+ if (error)
+ return error;
count = ocount;
pos = *offset;
if (XFS_FORCED_SHUTDOWN(mp))
return -EIO;
- if (ioflags & IO_ISDIRECT) {
- xfs_buftarg_t *target =
- (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
- mp->m_rtdev_targp : mp->m_ddev_targp;
-
- if ((pos & target->bt_smask) || (count & target->bt_smask))
- return XFS_ERROR(-EINVAL);
-
- if (!VN_CACHED(vp) && pos < i_size_read(inode))
- need_i_mutex = 0;
-
- if (VN_CACHED(vp))
- need_flush = 1;
- }
-
relock:
- if (need_i_mutex) {
+ if (ioflags & IO_ISDIRECT) {
+ iolock = XFS_IOLOCK_SHARED;
+ locktype = VRWLOCK_WRITE_DIRECT;
+ need_i_mutex = 0;
+ } else {
iolock = XFS_IOLOCK_EXCL;
locktype = VRWLOCK_WRITE;
-
+ need_i_mutex = 1;
mutex_lock(&inode->i_mutex);
- } else {
- iolock = XFS_IOLOCK_SHARED;
- locktype = VRWLOCK_WRITE_DIRECT;
}
xfs_ilock(xip, XFS_ILOCK_EXCL|iolock);
- isize = i_size_read(inode);
-
- if (file->f_flags & O_APPEND)
- *offset = isize;
-
start:
error = -generic_write_checks(file, &pos, &count,
S_ISBLK(inode->i_mode));
goto out_unlock_mutex;
}
- new_size = pos + count;
- if (new_size > isize)
- io->io_new_size = new_size;
-
if ((DM_EVENT_ENABLED(vp->v_vfsp, xip, DM_EVENT_WRITE) &&
!(ioflags & IO_INVIS) && !eventsent)) {
- loff_t savedsize = pos;
int dmflags = FILP_DELAY_FLAG(file);
if (need_i_mutex)
pos, count,
dmflags, &locktype);
if (error) {
- xfs_iunlock(xip, iolock);
- goto out_unlock_mutex;
+ goto out_unlock_internal;
}
xfs_ilock(xip, XFS_ILOCK_EXCL);
eventsent = 1;
* event prevents another call to XFS_SEND_DATA, which is
* what allows the size to change in the first place.
*/
- if ((file->f_flags & O_APPEND) && savedsize != isize) {
- pos = isize = xip->i_d.di_size;
+ if ((file->f_flags & O_APPEND) && pos != xip->i_size)
+ goto start;
+ }
+
+ if (ioflags & IO_ISDIRECT) {
+ xfs_buftarg_t *target =
+ (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
+ mp->m_rtdev_targp : mp->m_ddev_targp;
+
+ if ((pos & target->bt_smask) || (count & target->bt_smask)) {
+ xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
+ return XFS_ERROR(-EINVAL);
+ }
+
+ if (!need_i_mutex && (VN_CACHED(vp) || pos > xip->i_size)) {
+ xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
+ iolock = XFS_IOLOCK_EXCL;
+ locktype = VRWLOCK_WRITE;
+ need_i_mutex = 1;
+ mutex_lock(&inode->i_mutex);
+ xfs_ilock(xip, XFS_ILOCK_EXCL|iolock);
goto start;
}
}
+ new_size = pos + count;
+ if (new_size > xip->i_size)
+ io->io_new_size = new_size;
+
if (likely(!(ioflags & IO_INVIS))) {
file_update_time(file);
xfs_ichgtime_fast(xip, inode,
* to zero it out up to the new size.
*/
- if (pos > isize) {
- error = xfs_zero_eof(BHV_TO_VNODE(bdp), io, pos,
- isize, pos + count);
+ if (pos > xip->i_size) {
+ error = xfs_zero_eof(BHV_TO_VNODE(bdp), io, pos, xip->i_size);
if (error) {
- xfs_iunlock(xip, XFS_ILOCK_EXCL|iolock);
- goto out_unlock_mutex;
+ xfs_iunlock(xip, XFS_ILOCK_EXCL);
+ goto out_unlock_internal;
}
}
xfs_iunlock(xip, XFS_ILOCK_EXCL);
if (likely(!error))
error = -remove_suid(file->f_path.dentry);
if (unlikely(error)) {
- xfs_iunlock(xip, iolock);
- goto out_unlock_mutex;
+ goto out_unlock_internal;
}
}
current->backing_dev_info = mapping->backing_dev_info;
if ((ioflags & IO_ISDIRECT)) {
- if (need_flush) {
+ if (VN_CACHED(vp)) {
+ WARN_ON(need_i_mutex == 0);
xfs_inval_cached_trace(io, pos, -1,
ctooff(offtoct(pos)), -1);
- bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)),
+ error = bhv_vop_flushinval_pages(vp, ctooff(offtoct(pos)),
-1, FI_REMAPF_LOCKED);
+ if (error)
+ goto out_unlock_internal;
}
if (need_i_mutex) {
pos += ret;
count -= ret;
- need_i_mutex = 1;
ioflags &= ~IO_ISDIRECT;
xfs_iunlock(xip, iolock);
goto relock;
error = XFS_SEND_NAMESP(xip->i_mount, DM_EVENT_NOSPACE, vp,
DM_RIGHT_NULL, vp, DM_RIGHT_NULL, NULL, NULL,
0, 0, 0); /* Delay flag intentionally unused */
- if (error)
- goto out_nounlocks;
if (need_i_mutex)
mutex_lock(&inode->i_mutex);
xfs_rwlock(bdp, locktype);
- pos = xip->i_d.di_size;
+ if (error)
+ goto out_unlock_internal;
+ pos = xip->i_size;
ret = 0;
goto retry;
}
if (unlikely(ret < 0 && ret != -EFAULT && *offset > isize))
*offset = isize;
- if (*offset > xip->i_d.di_size) {
+ if (*offset > xip->i_size) {
xfs_ilock(xip, XFS_ILOCK_EXCL);
- if (*offset > xip->i_d.di_size) {
- xip->i_d.di_size = *offset;
- i_size_write(inode, *offset);
- xip->i_update_core = 1;
- xip->i_update_size = 1;
- }
+ if (*offset > xip->i_size)
+ xip->i_size = *offset;
xfs_iunlock(xip, XFS_ILOCK_EXCL);
}
error = sync_page_range(inode, mapping, pos, ret);
if (!error)
- error = ret;
- return error;
+ error = -ret;
+ if (need_i_mutex)
+ mutex_lock(&inode->i_mutex);
+ xfs_rwlock(bdp, locktype);
}
out_unlock_internal:
+ if (io->io_new_size) {
+ xfs_ilock(xip, XFS_ILOCK_EXCL);
+ io->io_new_size = 0;
+ /*
+ * If this was a direct or synchronous I/O that failed (such
+ * as ENOSPC) then part of the I/O may have been written to
+ * disk before the error occured. In this case the on-disk
+ * file size may have been adjusted beyond the in-memory file
+ * size and now needs to be truncated back.
+ */
+ if (xip->i_d.di_size > xip->i_size)
+ xip->i_d.di_size = xip->i_size;
+ xfs_iunlock(xip, XFS_ILOCK_EXCL);
+ }
xfs_rwunlock(bdp, locktype);
out_unlock_mutex:
if (need_i_mutex)
mutex_unlock(&inode->i_mutex);
- out_nounlocks:
return -error;
}
projects / karo-tx-linux.git / blobdiff