Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6
[sfrench/cifs-2.6.git] / fs / xfs / linux-2.6 / xfs_lrw.c
index 6f614f35f65015140d2078a92484328d275e94c1..1663533884902bb749a371271e7e4943f507a3f7 100644 (file)
 void
 xfs_rw_enter_trace(
        int                     tag,
-       xfs_iocore_t            *io,
+       xfs_inode_t             *ip,
        void                    *data,
        size_t                  segs,
        loff_t                  offset,
        int                     ioflags)
 {
-       xfs_inode_t     *ip = XFS_IO_INODE(io);
-
        if (ip->i_rwtrace == NULL)
                return;
        ktrace_enter(ip->i_rwtrace,
@@ -78,8 +76,8 @@ xfs_rw_enter_trace(
                (void *)((unsigned long)((offset >> 32) & 0xffffffff)),
                (void *)((unsigned long)(offset & 0xffffffff)),
                (void *)((unsigned long)ioflags),
-               (void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)),
-               (void *)((unsigned long)(io->io_new_size & 0xffffffff)),
+               (void *)((unsigned long)((ip->i_new_size >> 32) & 0xffffffff)),
+               (void *)((unsigned long)(ip->i_new_size & 0xffffffff)),
                (void *)((unsigned long)current_pid()),
                (void *)NULL,
                (void *)NULL,
@@ -89,13 +87,12 @@ xfs_rw_enter_trace(
 
 void
 xfs_inval_cached_trace(
-       xfs_iocore_t    *io,
+       xfs_inode_t     *ip,
        xfs_off_t       offset,
        xfs_off_t       len,
        xfs_off_t       first,
        xfs_off_t       last)
 {
-       xfs_inode_t     *ip = XFS_IO_INODE(io);
 
        if (ip->i_rwtrace == NULL)
                return;
@@ -131,7 +128,7 @@ xfs_inval_cached_trace(
  */
 STATIC int
 xfs_iozero(
-       struct inode            *ip,    /* inode                        */
+       struct xfs_inode        *ip,    /* inode                        */
        loff_t                  pos,    /* offset in file               */
        size_t                  count)  /* size of data to zero         */
 {
@@ -139,7 +136,7 @@ xfs_iozero(
        struct address_space    *mapping;
        int                     status;
 
-       mapping = ip->i_mapping;
+       mapping = ip->i_vnode->i_mapping;
        do {
                unsigned offset, bytes;
                void *fsdata;
@@ -205,7 +202,7 @@ xfs_read(
 
        if (unlikely(ioflags & IO_ISDIRECT)) {
                xfs_buftarg_t   *target =
-                       (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
+                       XFS_IS_REALTIME_INODE(ip) ?
                                mp->m_rtdev_targp : mp->m_ddev_targp;
                if ((*offset & target->bt_smask) ||
                    (size & target->bt_smask)) {
@@ -246,9 +243,8 @@ xfs_read(
 
        if (unlikely(ioflags & IO_ISDIRECT)) {
                if (VN_CACHED(vp))
-                       ret = xfs_flushinval_pages(ip,
-                                       ctooff(offtoct(*offset)),
-                                       -1, FI_REMAPF_LOCKED);
+                       ret = xfs_flushinval_pages(ip, (*offset & PAGE_CACHE_MASK),
+                                                   -1, FI_REMAPF_LOCKED);
                mutex_unlock(&inode->i_mutex);
                if (ret) {
                        xfs_iunlock(ip, XFS_IOLOCK_SHARED);
@@ -256,7 +252,7 @@ xfs_read(
                }
        }
 
-       xfs_rw_enter_trace(XFS_READ_ENTER, &ip->i_iocore,
+       xfs_rw_enter_trace(XFS_READ_ENTER, ip,
                                (void *)iovp, segs, *offset, ioflags);
 
        iocb->ki_pos = *offset;
@@ -301,7 +297,7 @@ xfs_splice_read(
                        return -error;
                }
        }
-       xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, &ip->i_iocore,
+       xfs_rw_enter_trace(XFS_SPLICE_READ_ENTER, ip,
                           pipe, count, *ppos, ioflags);
        ret = generic_file_splice_read(infilp, ppos, pipe, count, flags);
        if (ret > 0)
@@ -323,7 +319,6 @@ xfs_splice_write(
 {
        bhv_vnode_t             *vp = XFS_ITOV(ip);
        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, new_size;
@@ -350,10 +345,10 @@ xfs_splice_write(
 
        xfs_ilock(ip, XFS_ILOCK_EXCL);
        if (new_size > ip->i_size)
-               io->io_new_size = new_size;
+               ip->i_new_size = new_size;
        xfs_iunlock(ip, XFS_ILOCK_EXCL);
 
-       xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, &ip->i_iocore,
+       xfs_rw_enter_trace(XFS_SPLICE_WRITE_ENTER, ip,
                           pipe, count, *ppos, ioflags);
        ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags);
        if (ret > 0)
@@ -370,9 +365,9 @@ xfs_splice_write(
                xfs_iunlock(ip, XFS_ILOCK_EXCL);
        }
 
-       if (io->io_new_size) {
+       if (ip->i_new_size) {
                xfs_ilock(ip, XFS_ILOCK_EXCL);
-               io->io_new_size = 0;
+               ip->i_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);
@@ -389,20 +384,19 @@ xfs_splice_write(
  */
 STATIC int                             /* error (positive) */
 xfs_zero_last_block(
-       struct inode    *ip,
-       xfs_iocore_t    *io,
+       xfs_inode_t     *ip,
        xfs_fsize_t     offset,
        xfs_fsize_t     isize)
 {
        xfs_fileoff_t   last_fsb;
-       xfs_mount_t     *mp = io->io_mount;
+       xfs_mount_t     *mp = ip->i_mount;
        int             nimaps;
        int             zero_offset;
        int             zero_len;
        int             error = 0;
        xfs_bmbt_irec_t imap;
 
-       ASSERT(ismrlocked(io->io_lock, MR_UPDATE) != 0);
+       ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE) != 0);
 
        zero_offset = XFS_B_FSB_OFFSET(mp, isize);
        if (zero_offset == 0) {
@@ -415,7 +409,7 @@ xfs_zero_last_block(
 
        last_fsb = XFS_B_TO_FSBT(mp, isize);
        nimaps = 1;
-       error = XFS_BMAPI(mp, NULL, io, last_fsb, 1, 0, NULL, 0, &imap,
+       error = xfs_bmapi(NULL, ip, last_fsb, 1, 0, NULL, 0, &imap,
                          &nimaps, NULL, NULL);
        if (error) {
                return error;
@@ -433,14 +427,14 @@ xfs_zero_last_block(
         * out sync.  We need to drop the ilock while we do this so we
         * don't deadlock when the buffer cache calls back to us.
         */
-       XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD);
+       xfs_iunlock(ip, XFS_ILOCK_EXCL| XFS_EXTSIZE_RD);
 
        zero_len = mp->m_sb.sb_blocksize - zero_offset;
        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);
+       xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
        ASSERT(error >= 0);
        return error;
 }
@@ -458,35 +452,33 @@ xfs_zero_last_block(
 
 int                                    /* error (positive) */
 xfs_zero_eof(
-       bhv_vnode_t     *vp,
-       xfs_iocore_t    *io,
+       xfs_inode_t     *ip,
        xfs_off_t       offset,         /* starting I/O offset */
        xfs_fsize_t     isize)          /* current inode size */
 {
-       struct inode    *ip = vn_to_inode(vp);
+       xfs_mount_t     *mp = ip->i_mount;
        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;
        xfs_bmbt_irec_t imap;
 
-       ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-       ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+       ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+       ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
        ASSERT(offset > isize);
 
        /*
         * 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, offset, isize);
+       error = xfs_zero_last_block(ip, offset, isize);
        if (error) {
-               ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-               ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+               ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+               ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
                return error;
        }
 
@@ -514,11 +506,11 @@ xfs_zero_eof(
        while (start_zero_fsb <= end_zero_fsb) {
                nimaps = 1;
                zero_count_fsb = end_zero_fsb - start_zero_fsb + 1;
-               error = XFS_BMAPI(mp, NULL, io, start_zero_fsb, zero_count_fsb,
+               error = xfs_bmapi(NULL, ip, start_zero_fsb, zero_count_fsb,
                                  0, NULL, 0, &imap, &nimaps, NULL, NULL);
                if (error) {
-                       ASSERT(ismrlocked(io->io_lock, MR_UPDATE));
-                       ASSERT(ismrlocked(io->io_iolock, MR_UPDATE));
+                       ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE));
+                       ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE));
                        return error;
                }
                ASSERT(nimaps > 0);
@@ -542,7 +534,7 @@ xfs_zero_eof(
                 * Drop the inode lock while we're doing the I/O.
                 * We'll still have the iolock to protect us.
                 */
-               XFS_IUNLOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
+               xfs_iunlock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
 
                zero_off = XFS_FSB_TO_B(mp, start_zero_fsb);
                zero_len = XFS_FSB_TO_B(mp, imap.br_blockcount);
@@ -558,14 +550,13 @@ xfs_zero_eof(
                start_zero_fsb = imap.br_startoff + imap.br_blockcount;
                ASSERT(start_zero_fsb <= (end_zero_fsb + 1));
 
-               XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
+               xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
        }
 
        return 0;
 
 out_lock:
-
-       XFS_ILOCK(mp, io, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
+       xfs_ilock(ip, XFS_ILOCK_EXCL|XFS_EXTSIZE_RD);
        ASSERT(error >= 0);
        return error;
 }
@@ -587,7 +578,6 @@ xfs_write(
        xfs_mount_t             *mp;
        ssize_t                 ret = 0, error = 0;
        xfs_fsize_t             isize, new_size;
-       xfs_iocore_t            *io;
        int                     iolock;
        int                     eventsent = 0;
        bhv_vrwlock_t           locktype;
@@ -607,8 +597,7 @@ xfs_write(
        if (count == 0)
                return 0;
 
-       io = &xip->i_iocore;
-       mp = io->io_mount;
+       mp = xip->i_mount;
 
        xfs_wait_for_freeze(mp, SB_FREEZE_WRITE);
 
@@ -667,7 +656,7 @@ start:
 
        if (ioflags & IO_ISDIRECT) {
                xfs_buftarg_t   *target =
-                       (xip->i_d.di_flags & XFS_DIFLAG_REALTIME) ?
+                       XFS_IS_REALTIME_INODE(xip) ?
                                mp->m_rtdev_targp : mp->m_ddev_targp;
 
                if ((pos & target->bt_smask) || (count & target->bt_smask)) {
@@ -688,7 +677,7 @@ start:
 
        new_size = pos + count;
        if (new_size > xip->i_size)
-               io->io_new_size = new_size;
+               xip->i_new_size = new_size;
 
        if (likely(!(ioflags & IO_INVIS))) {
                file_update_time(file);
@@ -706,7 +695,7 @@ start:
         */
 
        if (pos > xip->i_size) {
-               error = xfs_zero_eof(vp, io, pos, xip->i_size);
+               error = xfs_zero_eof(xip, pos, xip->i_size);
                if (error) {
                        xfs_iunlock(xip, XFS_ILOCK_EXCL);
                        goto out_unlock_internal;
@@ -740,10 +729,10 @@ retry:
        if ((ioflags & IO_ISDIRECT)) {
                if (VN_CACHED(vp)) {
                        WARN_ON(need_i_mutex == 0);
-                       xfs_inval_cached_trace(io, pos, -1,
-                                       ctooff(offtoct(pos)), -1);
+                       xfs_inval_cached_trace(xip, pos, -1,
+                                       (pos & PAGE_CACHE_MASK), -1);
                        error = xfs_flushinval_pages(xip,
-                                       ctooff(offtoct(pos)),
+                                       (pos & PAGE_CACHE_MASK),
                                        -1, FI_REMAPF_LOCKED);
                        if (error)
                                goto out_unlock_internal;
@@ -751,7 +740,7 @@ retry:
 
                if (need_i_mutex) {
                        /* demote the lock now the cached pages are gone */
-                       XFS_ILOCK_DEMOTE(mp, io, XFS_IOLOCK_EXCL);
+                       xfs_ilock_demote(xip, XFS_IOLOCK_EXCL);
                        mutex_unlock(&inode->i_mutex);
 
                        iolock = XFS_IOLOCK_SHARED;
@@ -759,7 +748,7 @@ retry:
                        need_i_mutex = 0;
                }
 
-               xfs_rw_enter_trace(XFS_DIOWR_ENTER, io, (void *)iovp, segs,
+               xfs_rw_enter_trace(XFS_DIOWR_ENTER, xip, (void *)iovp, segs,
                                *offset, ioflags);
                ret = generic_file_direct_write(iocb, iovp,
                                &segs, pos, offset, count, ocount);
@@ -779,7 +768,7 @@ retry:
                        goto relock;
                }
        } else {
-               xfs_rw_enter_trace(XFS_WRITE_ENTER, io, (void *)iovp, segs,
+               xfs_rw_enter_trace(XFS_WRITE_ENTER, xip, (void *)iovp, segs,
                                *offset, ioflags);
                ret = generic_file_buffered_write(iocb, iovp, segs,
                                pos, offset, count, ret);
@@ -843,9 +832,9 @@ retry:
        }
 
  out_unlock_internal:
-       if (io->io_new_size) {
+       if (xip->i_new_size) {
                xfs_ilock(xip, XFS_ILOCK_EXCL);
-               io->io_new_size = 0;
+               xip->i_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
@@ -894,25 +883,6 @@ xfs_bdstrat_cb(struct xfs_buf *bp)
        }
 }
 
-
-int
-xfs_bmap(
-       xfs_inode_t     *ip,
-       xfs_off_t       offset,
-       ssize_t         count,
-       int             flags,
-       xfs_iomap_t     *iomapp,
-       int             *niomaps)
-{
-       xfs_iocore_t    *io = &ip->i_iocore;
-
-       ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG);
-       ASSERT(((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != 0) ==
-              ((ip->i_iocore.io_flags & XFS_IOCORE_RT) != 0));
-
-       return xfs_iomap(io, offset, count, flags, iomapp, niomaps);
-}
-
 /*
  * Wrapper around bdstrat so that we can stop data
  * from going to disk in case we are shutting down the filesystem.