STATIC int
xfs_getbmapx_fix_eof_hole(
xfs_inode_t *ip, /* xfs incore inode pointer */
- struct getbmap *out, /* output structure */
+ struct getbmapx *out, /* output structure */
int prealloced, /* this is a file with
- * preallocated data space */
+ * preallocated data space */
__int64_t end, /* last block requested */
xfs_fsblock_t startblock)
{
__int64_t fixlen;
xfs_mount_t *mp; /* file system mount point */
+ xfs_ifork_t *ifp; /* inode fork pointer */
+ xfs_extnum_t lastx; /* last extent pointer */
+ xfs_fileoff_t fileblock;
if (startblock == HOLESTARTBLOCK) {
mp = ip->i_mount;
out->bmv_length = fixlen;
}
} else {
- out->bmv_block = XFS_FSB_TO_DB(ip, startblock);
+ if (startblock == DELAYSTARTBLOCK)
+ out->bmv_block = -2;
+ else
+ out->bmv_block = XFS_FSB_TO_DB(ip, startblock);
+ fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
+ ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
+ if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
+ (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
+ out->bmv_oflags |= BMV_OF_LAST;
}
return 1;
}
/*
- * Fcntl interface to xfs_bmapi.
+ * Get inode's extents as described in bmv, and format for output.
+ * Calls formatter to fill the user's buffer until all extents
+ * are mapped, until the passed-in bmv->bmv_count slots have
+ * been filled, or until the formatter short-circuits the loop,
+ * if it is tracking filled-in extents on its own.
*/
int /* error code */
xfs_getbmap(
xfs_inode_t *ip,
- struct getbmap *bmv, /* user bmap structure */
- void __user *ap, /* pointer to user's array */
- int interface) /* interface flags */
+ struct getbmapx *bmv, /* user bmap structure */
+ xfs_bmap_format_t formatter, /* format to user */
+ void *arg) /* formatter arg */
{
__int64_t bmvend; /* last block requested */
int error; /* return value */
int nexleft; /* # of user extents left */
int subnex; /* # of bmapi's can do */
int nmap; /* number of map entries */
- struct getbmap out; /* output structure */
+ struct getbmapx out; /* output structure */
int whichfork; /* data or attr fork */
int prealloced; /* this is a file with
* preallocated data space */
- int sh_unwritten; /* true, if unwritten */
- /* extents listed separately */
+ int iflags; /* interface flags */
int bmapi_flags; /* flags for xfs_bmapi */
- __int32_t oflags; /* getbmapx bmv_oflags field */
mp = ip->i_mount;
+ iflags = bmv->bmv_iflags;
- whichfork = interface & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
- sh_unwritten = (interface & BMV_IF_PREALLOC) != 0;
+ whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
/* If the BMV_IF_NO_DMAPI_READ interface bit specified, do not
* generate a DMAPI read event. Otherwise, if the DM_EVENT_READ
* could misinterpret holes in a DMAPI file as true holes,
* when in fact they may represent offline user data.
*/
- if ((interface & BMV_IF_NO_DMAPI_READ) == 0 &&
+ if ((iflags & BMV_IF_NO_DMAPI_READ) == 0 &&
DM_EVENT_ENABLED(ip, DM_EVENT_READ) &&
whichfork == XFS_DATA_FORK) {
error = XFS_SEND_DATA(mp, DM_EVENT_READ, ip, 0, 0, 0, NULL);
xfs_ilock(ip, XFS_IOLOCK_SHARED);
- if (whichfork == XFS_DATA_FORK &&
- (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size)) {
+ if (((iflags & BMV_IF_DELALLOC) == 0) &&
+ (whichfork == XFS_DATA_FORK) &&
+ (ip->i_delayed_blks || ip->i_size > ip->i_d.di_size)) {
/* xfs_fsize_t last_byte = xfs_file_last_byte(ip); */
error = xfs_flush_pages(ip, (xfs_off_t)0,
-1, 0, FI_REMAPF);
}
}
- ASSERT(whichfork == XFS_ATTR_FORK || ip->i_delayed_blks == 0);
+ ASSERT(whichfork == XFS_ATTR_FORK || (iflags & BMV_IF_DELALLOC) ||
+ ip->i_delayed_blks == 0);
lock = xfs_ilock_map_shared(ip);
nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
bmapi_flags = XFS_BMAPI_AFLAG(whichfork) |
- ((sh_unwritten) ? 0 : XFS_BMAPI_IGSTATE);
+ ((iflags & BMV_IF_PREALLOC) ? 0 : XFS_BMAPI_IGSTATE);
/*
* Allocate enough space to handle "subnex" maps at a time.
bmv->bmv_entries = 0;
- if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0) {
- error = 0;
- goto unlock_and_return;
+ if ((XFS_IFORK_NEXTENTS(ip, whichfork) == 0)) {
+ if (((iflags & BMV_IF_DELALLOC) == 0) ||
+ whichfork == XFS_ATTR_FORK) {
+ error = 0;
+ goto unlock_and_return;
+ }
}
nexleft = nex;
ASSERT(nmap <= subnex);
for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
- nexleft--;
- oflags = (map[i].br_state == XFS_EXT_UNWRITTEN) ?
- BMV_OF_PREALLOC : 0;
+ out.bmv_oflags = 0;
+ if (map[i].br_state == XFS_EXT_UNWRITTEN)
+ out.bmv_oflags |= BMV_OF_PREALLOC;
+ else if (map[i].br_startblock == DELAYSTARTBLOCK)
+ out.bmv_oflags |= BMV_OF_DELALLOC;
out.bmv_offset = XFS_FSB_TO_BB(mp, map[i].br_startoff);
out.bmv_length = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
- ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
+ out.bmv_unused1 = out.bmv_unused2 = 0;
+ ASSERT(((iflags & BMV_IF_DELALLOC) != 0) ||
+ (map[i].br_startblock != DELAYSTARTBLOCK));
if (map[i].br_startblock == HOLESTARTBLOCK &&
whichfork == XFS_ATTR_FORK) {
/* came to the end of attribute fork */
+ out.bmv_oflags |= BMV_OF_LAST;
goto unlock_and_return;
} else {
+ int full = 0; /* user array is full */
+
if (!xfs_getbmapx_fix_eof_hole(ip, &out,
prealloced, bmvend,
map[i].br_startblock)) {
goto unlock_and_return;
}
- /* return either getbmap/getbmapx structure. */
- if (interface & BMV_IF_EXTENDED) {
- struct getbmapx outx;
-
- GETBMAP_CONVERT(out,outx);
- outx.bmv_oflags = oflags;
- outx.bmv_unused1 = outx.bmv_unused2 = 0;
- if (copy_to_user(ap, &outx,
- sizeof(outx))) {
- error = XFS_ERROR(EFAULT);
- goto unlock_and_return;
- }
- } else {
- if (copy_to_user(ap, &out,
- sizeof(out))) {
- error = XFS_ERROR(EFAULT);
- goto unlock_and_return;
- }
- }
+ /* format results & advance arg */
+ error = formatter(&arg, &out, &full);
+ if (error || full)
+ goto unlock_and_return;
+ nexleft--;
bmv->bmv_offset =
out.bmv_offset + out.bmv_length;
bmv->bmv_length = MAX((__int64_t)0,
(__int64_t)(bmvend - bmv->bmv_offset));
bmv->bmv_entries++;
- ap = (interface & BMV_IF_EXTENDED) ?
- (void __user *)
- ((struct getbmapx __user *)ap + 1) :
- (void __user *)
- ((struct getbmap __user *)ap + 1);
}
}
} while (nmap && nexleft && bmv->bmv_length);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff