/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#include <xfs.h>
xfs_zone_t *xfs_ifork_zone;
xfs_zone_t *xfs_inode_zone;
#ifdef DEBUG
void
xfs_inobp_check(
xfs_mount_t *mp,
xfs_buf_t *bp)
{
int i;
int j;
xfs_dinode_t *dip;
j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog;
for (i = 0; i < j; i++) {
dip = (xfs_dinode_t *)xfs_buf_offset(bp,
i * mp->m_sb.sb_inodesize);
if (INT_ISZERO(dip->di_next_unlinked, ARCH_CONVERT)) {
xfs_fs_cmn_err(CE_ALERT, mp,
"Detected a bogus zero next_unlinked field in incore inode buffer 0x%p. About to pop an ASSERT.",
bp);
ASSERT(!INT_ISZERO(dip->di_next_unlinked, ARCH_CONVERT));
}
}
}
#endif
/*
* This routine is called to map an inode to the buffer containing
* the on-disk version of the inode. It returns a pointer to the
* buffer containing the on-disk inode in the bpp parameter, and in
* the dip parameter it returns a pointer to the on-disk inode within
* that buffer.
*
* If a non-zero error is returned, then the contents of bpp and
* dipp are undefined.
*
* If the inode is new and has not yet been initialized, use xfs_imap()
* to determine the size and location of the buffer to read from disk.
* If the inode has already been mapped to its buffer and read in once,
* then use the mapping information stored in the inode rather than
* calling xfs_imap(). This allows us to avoid the overhead of looking
* at the inode btree for small block file systems (see xfs_dilocate()).
* We can tell whether the inode has been mapped in before by comparing
* its disk block address to 0. Only uninitialized inodes will have
* 0 for the disk block address.
*/
int
xfs_itobp(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_inode_t *ip,
xfs_dinode_t **dipp,
xfs_buf_t **bpp,
xfs_daddr_t bno)
{
xfs_buf_t *bp;
int error;
xfs_imap_t imap;
#ifdef __KERNEL__
int i;
int ni;
#endif
if (ip->i_blkno == (xfs_daddr_t)0) {
/*
* Call the space management code to find the location of the
* inode on disk.
*/
imap.im_blkno = bno;
error = xfs_imap(mp, tp, ip->i_ino, &imap, XFS_IMAP_LOOKUP);
if (error != 0) {
return error;
}
/*
* If the inode number maps to a block outside the bounds
* of the file system then return NULL rather than calling
* read_buf and panicing when we get an error from the
* driver.
*/
if ((imap.im_blkno + imap.im_len) >
XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)) {
#ifdef DEBUG
xfs_fs_cmn_err(CE_ALERT, mp, "xfs_itobp: "
"(imap.im_blkno (0x%llx) "
"+ imap.im_len (0x%llx)) > "
" XFS_FSB_TO_BB(mp, "
"mp->m_sb.sb_dblocks) (0x%llx)",
imap.im_blkno, imap.im_len,
XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks));
#endif /* DEBUG */
return XFS_ERROR(EINVAL);
}
/*
* Fill in the fields in the inode that will be used to
* map the inode to its buffer from now on.
*/
ip->i_blkno = imap.im_blkno;
ip->i_len = imap.im_len;
ip->i_boffset = imap.im_boffset;
} else {
/*
* We've already mapped the inode once, so just use the
* mapping that we saved the first time.
*/
imap.im_blkno = ip->i_blkno;
imap.im_len = ip->i_len;
imap.im_boffset = ip->i_boffset;
}
ASSERT(bno == 0 || bno == imap.im_blkno);
/*
* Read in the buffer. If tp is NULL, xfs_trans_read_buf() will
* default to just a read_buf() call.
*/
error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap.im_blkno,
(int)imap.im_len, XFS_BUF_LOCK, &bp);
if (error) {
#ifdef DEBUG
xfs_fs_cmn_err(CE_ALERT, mp, "xfs_itobp: "
"xfs_trans_read_buf() returned error %d, "
"imap.im_blkno 0x%llx, imap.im_len 0x%llx",
error, imap.im_blkno, imap.im_len);
#endif /* DEBUG */
return error;
}
#ifdef __KERNEL__
/*
* Validate the magic number and version of every inode in the buffer
* (if DEBUG kernel) or the first inode in the buffer, otherwise.
*/
#ifdef DEBUG
ni = BBTOB(imap.im_len) >> mp->m_sb.sb_inodelog;
#else
ni = 1;
#endif
for (i = 0; i < ni; i++) {
int di_ok;
xfs_dinode_t *dip;
dip = (xfs_dinode_t *)xfs_buf_offset(bp,
(i << mp->m_sb.sb_inodelog));
di_ok = INT_GET(dip->di_core.di_magic, ARCH_CONVERT) == XFS_DINODE_MAGIC &&
XFS_DINODE_GOOD_VERSION(INT_GET(dip->di_core.di_version, ARCH_CONVERT));
if (XFS_TEST_ERROR(!di_ok, mp, XFS_ERRTAG_ITOBP_INOTOBP,
XFS_RANDOM_ITOBP_INOTOBP)) {
#ifdef DEBUG
prdev("bad inode magic/vsn daddr 0x%Lx #%d (magic=%x)",
mp->m_dev, imap.im_blkno, i,
INT_GET(dip->di_core.di_magic, ARCH_CONVERT));
#endif
xfs_trans_brelse(tp, bp);
return XFS_ERROR(EFSCORRUPTED);
}
}
#endif /* __KERNEL__ */
xfs_inobp_check(mp, bp);
/*
* Mark the buffer as an inode buffer now that it looks good
*/
XFS_BUF_SET_VTYPE(bp, B_FS_INO);
/*
* Set *dipp to point to the on-disk inode in the buffer.
*/
*dipp = (xfs_dinode_t *)xfs_buf_offset(bp, imap.im_boffset);
*bpp = bp;
return 0;
}
/*
* Move inode type and inode format specific information from the
* on-disk inode to the in-core inode. For fifos, devs, and sockets
* this means set if_rdev to the proper value. For files, directories,
* and symlinks this means to bring in the in-line data or extent
* pointers. For a file in B-tree format, only the root is immediately
* brought in-core. The rest will be in-lined in if_extents when it
* is first referenced (see xfs_iread_extents()).
*/
STATIC int
xfs_iformat(
xfs_inode_t *ip,
xfs_dinode_t *dip,
int alloc_mode)
{
xfs_attr_shortform_t *atp;
int size;
int error;
xfs_fsize_t di_size;
ip->i_df.if_ext_max =
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
error = 0;
if (INT_GET(dip->di_core.di_nextents, ARCH_CONVERT) +
INT_GET(dip->di_core.di_anextents, ARCH_CONVERT) >
INT_GET(dip->di_core.di_nblocks, ARCH_CONVERT)) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt dinode %Lu, extent total = %d, nblocks = %Lu."
" Unmount and run xfs_repair.",
(unsigned long long)ip->i_ino,
(int)(INT_GET(dip->di_core.di_nextents, ARCH_CONVERT)
+ INT_GET(dip->di_core.di_anextents, ARCH_CONVERT)),
(unsigned long long)
INT_GET(dip->di_core.di_nblocks, ARCH_CONVERT));
return XFS_ERROR(EFSCORRUPTED);
}
if (INT_GET(dip->di_core.di_forkoff, ARCH_CONVERT) > ip->i_mount->m_sb.sb_inodesize) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt dinode %Lu, forkoff = 0x%x."
" Unmount and run xfs_repair.",
(unsigned long long)ip->i_ino,
(int)(INT_GET(dip->di_core.di_forkoff, ARCH_CONVERT)));
return XFS_ERROR(EFSCORRUPTED);
}
switch (ip->i_d.di_mode & IFMT) {
case IFIFO:
case IFCHR:
case IFBLK:
case IFSOCK:
if (INT_GET(dip->di_core.di_format, ARCH_CONVERT) != XFS_DINODE_FMT_DEV)
return XFS_ERROR(EFSCORRUPTED);
ip->i_d.di_size = 0;
ip->i_df.if_u2.if_rdev = INT_GET(dip->di_u.di_dev, ARCH_CONVERT);
break;
case IFREG:
case IFLNK:
case IFDIR:
switch (INT_GET(dip->di_core.di_format, ARCH_CONVERT)) {
case XFS_DINODE_FMT_LOCAL:
/*
* no local regular files yet
*/
if ((INT_GET(dip->di_core.di_mode, ARCH_CONVERT) & IFMT) == IFREG) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt inode "
"(local format for regular file) %Lu. "
"Unmount and run xfs_repair.",
(unsigned long long) ip->i_ino);
return XFS_ERROR(EFSCORRUPTED);
}
di_size = INT_GET(dip->di_core.di_size, ARCH_CONVERT);
if (di_size >
XFS_DFORK_DSIZE_ARCH(dip, ip->i_mount, ARCH_CONVERT)) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt inode %Lu "
"(bad size %Ld for local inode). "
"Unmount and run xfs_repair.",
(unsigned long long) ip->i_ino,
(long long) di_size);
return XFS_ERROR(EFSCORRUPTED);
}
size = (int)di_size;
error = xfs_iformat_local(ip, dip, XFS_DATA_FORK,
size, alloc_mode);
break;
case XFS_DINODE_FMT_EXTENTS:
error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK,
alloc_mode);
break;
case XFS_DINODE_FMT_BTREE:
error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK,
alloc_mode);
break;
default:
return XFS_ERROR(EFSCORRUPTED);
}
break;
default:
return XFS_ERROR(EFSCORRUPTED);
}
if (error) {
return error;
}
if (!XFS_DFORK_Q_ARCH(dip, ARCH_CONVERT))
return 0;
ASSERT(ip->i_afp == NULL);
ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, alloc_mode);
ip->i_afp->if_ext_max =
XFS_IFORK_ASIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
switch (INT_GET(dip->di_core.di_aformat, ARCH_CONVERT)) {
case XFS_DINODE_FMT_LOCAL:
atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR_ARCH(dip, ARCH_CONVERT);
size = (int)INT_GET(atp->hdr.totsize, ARCH_CONVERT);
error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size,
alloc_mode);
break;
case XFS_DINODE_FMT_EXTENTS:
error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK,
alloc_mode);
break;
case XFS_DINODE_FMT_BTREE:
error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK,
alloc_mode);
break;
default:
error = XFS_ERROR(EFSCORRUPTED);
break;
}
if (error) {
kmem_zone_free(xfs_ifork_zone, ip->i_afp);
ip->i_afp = NULL;
xfs_idestroy_fork(ip, XFS_DATA_FORK);
}
return error;
}
/*
* The file is in-lined in the on-disk inode.
* If it fits into if_inline_data, then copy
* it there, otherwise allocate a buffer for it
* and copy the data there. Either way, set
* if_data to point at the data.
* If we allocate a buffer for the data, make
* sure that its size is a multiple of 4 and
* record the real size in i_real_bytes.
*/
STATIC int
xfs_iformat_local(
xfs_inode_t *ip,
xfs_dinode_t *dip,
int whichfork,
int size,
int alloc_mode)
{
xfs_ifork_t *ifp;
int real_size;
/*
* If the size is unreasonable, then something
* is wrong and we just bail out rather than crash in
* kmem_alloc() or bcopy() below.
*/
if (size > XFS_DFORK_SIZE_ARCH(dip, ip->i_mount, whichfork, ARCH_CONVERT)) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt inode %Lu "
"(bad size %d for local fork, size = %d). "
"Unmount and run xfs_repair.",
(unsigned long long) ip->i_ino, size,
XFS_DFORK_SIZE_ARCH(dip, ip->i_mount, whichfork, ARCH_CONVERT));
return XFS_ERROR(EFSCORRUPTED);
}
ifp = XFS_IFORK_PTR(ip, whichfork);
real_size = 0;
if (size == 0)
ifp->if_u1.if_data = NULL;
else if (size <= sizeof(ifp->if_u2.if_inline_data))
ifp->if_u1.if_data = ifp->if_u2.if_inline_data;
else {
real_size = roundup(size, 4);
ifp->if_u1.if_data = kmem_alloc(real_size, alloc_mode);
}
ifp->if_bytes = size;
ifp->if_real_bytes = real_size;
if (size)
bcopy(XFS_DFORK_PTR_ARCH(dip, whichfork, ARCH_CONVERT), ifp->if_u1.if_data, size);
ifp->if_flags &= ~XFS_IFEXTENTS;
ifp->if_flags |= XFS_IFINLINE;
return 0;
}
/*
* The file consists of a set of extents all
* of which fit into the on-disk inode.
* If there are few enough extents to fit into
* the if_inline_ext, then copy them there.
* Otherwise allocate a buffer for them and copy
* them into it. Either way, set if_extents
* to point at the extents.
*/
STATIC int
xfs_iformat_extents(
xfs_inode_t *ip,
xfs_dinode_t *dip,
int whichfork,
int alloc_mode)
{
xfs_ifork_t *ifp;
int nex;
int real_size;
int size;
ifp = XFS_IFORK_PTR(ip, whichfork);
nex = XFS_DFORK_NEXTENTS_ARCH(dip, whichfork, ARCH_CONVERT);
size = nex * (uint)sizeof(xfs_bmbt_rec_t);
/*
* If the number of extents is unreasonable, then something
* is wrong and we just bail out rather than crash in
* kmem_alloc() or bcopy() below.
*/
if (size < 0 || size > XFS_DFORK_SIZE_ARCH(dip, ip->i_mount, whichfork, ARCH_CONVERT)) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt inode %Lu ((a)extents = %d). "
"Unmount and run xfs_repair.",
(unsigned long long) ip->i_ino, nex);
return XFS_ERROR(EFSCORRUPTED);
}
real_size = 0;
if (nex == 0)
ifp->if_u1.if_extents = NULL;
else if (nex <= XFS_INLINE_EXTS)
ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
else {
ifp->if_u1.if_extents = kmem_alloc(size, alloc_mode);
ASSERT(ifp->if_u1.if_extents != NULL);
real_size = size;
}
ifp->if_bytes = size;
ifp->if_real_bytes = real_size;
if (size) {
xfs_validate_extents(
(xfs_bmbt_rec_32_t *)XFS_DFORK_PTR_ARCH(dip, whichfork, ARCH_CONVERT),
nex, XFS_EXTFMT_INODE(ip));
bcopy(XFS_DFORK_PTR_ARCH(dip, whichfork, ARCH_CONVERT), ifp->if_u1.if_extents,
size);
xfs_bmap_trace_exlist("xfs_iformat_extents", ip, nex,
whichfork);
if (whichfork != XFS_DATA_FORK ||
XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE)
if (xfs_check_nostate_extents(
ifp->if_u1.if_extents, nex))
return XFS_ERROR(EFSCORRUPTED);
}
ifp->if_flags |= XFS_IFEXTENTS;
return 0;
}
/*
* The file has too many extents to fit into
* the inode, so they are in B-tree format.
* Allocate a buffer for the root of the B-tree
* and copy the root into it. The i_extents
* field will remain NULL until all of the
* extents are read in (when they are needed).
*/
STATIC int
xfs_iformat_btree(
xfs_inode_t *ip,
xfs_dinode_t *dip,
int whichfork,
int alloc_mode)
{
xfs_bmdr_block_t *dfp;
xfs_ifork_t *ifp;
/* REFERENCED */
int nrecs;
int size;
ifp = XFS_IFORK_PTR(ip, whichfork);
dfp = (xfs_bmdr_block_t *)XFS_DFORK_PTR_ARCH(dip, whichfork, ARCH_CONVERT);
size = XFS_BMAP_BROOT_SPACE(dfp);
nrecs = XFS_BMAP_BROOT_NUMRECS(dfp);
/*
* blow out if -- fork has less extents than can fit in
* fork (fork shouldn't be a btree format), root btree
* block has more records than can fit into the fork,
* or the number of extents is greater than the number of
* blocks.
*/
if (XFS_IFORK_NEXTENTS(ip, whichfork) <= ifp->if_ext_max
|| XFS_BMDR_SPACE_CALC(nrecs) >
XFS_DFORK_SIZE_ARCH(dip, ip->i_mount, whichfork, ARCH_CONVERT)
|| XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks) {
xfs_fs_cmn_err(CE_WARN, ip->i_mount,
"corrupt inode %Lu (btree). "
"Unmount and run xfs_repair.",
(unsigned long long) ip->i_ino);
return XFS_ERROR(EFSCORRUPTED);
}
ifp->if_broot_bytes = size;
ifp->if_broot = kmem_alloc(size, alloc_mode);
ASSERT(ifp->if_broot != NULL);
/*
* Copy and convert from the on-disk structure
* to the in-memory structure.
*/
xfs_bmdr_to_bmbt(dfp, XFS_DFORK_SIZE_ARCH(dip, ip->i_mount, whichfork, ARCH_CONVERT),
ifp->if_broot, size);
ifp->if_flags &= ~XFS_IFEXTENTS;
ifp->if_flags |= XFS_IFBROOT;
return 0;
}
/*
* xfs_xlate_dinode_core - translate an xfs_inode_core_t between ondisk
* and native format
*
* buf = on-disk representation
* dip = native representation
* dir = direction - +ve -> disk to native
* -ve -> native to disk
* arch = on-disk architecture
*/
void
xfs_xlate_dinode_core(xfs_caddr_t buf, xfs_dinode_core_t *dip,
int dir, xfs_arch_t arch)
{
xfs_dinode_core_t *buf_core;
xfs_dinode_core_t *mem_core;
ASSERT(dir);
buf_core=(xfs_dinode_core_t*)buf;
mem_core=(xfs_dinode_core_t*)dip;
if (arch == ARCH_NOCONVERT) {
if (dir>0) {
bcopy((xfs_caddr_t)buf_core, (xfs_caddr_t)mem_core, sizeof(xfs_dinode_core_t));
} else {
bcopy((xfs_caddr_t)mem_core, (xfs_caddr_t)buf_core, sizeof(xfs_dinode_core_t));
}
return;
}
INT_XLATE(buf_core->di_magic, mem_core->di_magic, dir, arch);
INT_XLATE(buf_core->di_mode, mem_core->di_mode, dir, arch);
INT_XLATE(buf_core->di_version, mem_core->di_version, dir, arch);
INT_XLATE(buf_core->di_format, mem_core->di_format, dir, arch);
INT_XLATE(buf_core->di_onlink, mem_core->di_onlink, dir, arch);
INT_XLATE(buf_core->di_uid, mem_core->di_uid, dir, arch);
INT_XLATE(buf_core->di_gid, mem_core->di_gid, dir, arch);
INT_XLATE(buf_core->di_nlink, mem_core->di_nlink, dir, arch);
INT_XLATE(buf_core->di_projid, mem_core->di_projid, dir, arch);
if (dir>0) {
bcopy(buf_core->di_pad, mem_core->di_pad, sizeof(buf_core->di_pad));
} else {
bcopy(mem_core->di_pad, buf_core->di_pad, sizeof(buf_core->di_pad));
}
INT_XLATE(buf_core->di_atime.t_sec, mem_core->di_atime.t_sec, dir, arch);
INT_XLATE(buf_core->di_atime.t_nsec,mem_core->di_atime.t_nsec, dir, arch);
INT_XLATE(buf_core->di_mtime.t_sec, mem_core->di_mtime.t_sec, dir, arch);
INT_XLATE(buf_core->di_mtime.t_nsec,mem_core->di_mtime.t_nsec, dir, arch);
INT_XLATE(buf_core->di_ctime.t_sec, mem_core->di_ctime.t_sec, dir, arch);
INT_XLATE(buf_core->di_ctime.t_nsec,mem_core->di_ctime.t_nsec, dir, arch);
INT_XLATE(buf_core->di_size, mem_core->di_size, dir, arch);
INT_XLATE(buf_core->di_nblocks, mem_core->di_nblocks, dir, arch);
INT_XLATE(buf_core->di_extsize, mem_core->di_extsize, dir, arch);
INT_XLATE(buf_core->di_nextents, mem_core->di_nextents, dir, arch);
INT_XLATE(buf_core->di_anextents, mem_core->di_anextents, dir, arch);
INT_XLATE(buf_core->di_forkoff, mem_core->di_forkoff, dir, arch);
INT_XLATE(buf_core->di_aformat, mem_core->di_aformat, dir, arch);
INT_XLATE(buf_core->di_dmevmask, mem_core->di_dmevmask, dir, arch);
INT_XLATE(buf_core->di_dmstate, mem_core->di_dmstate, dir, arch);
INT_XLATE(buf_core->di_flags, mem_core->di_flags, dir, arch);
INT_XLATE(buf_core->di_gen, mem_core->di_gen, dir, arch);
}
/*
* Given a mount structure and an inode number, return a pointer
* to a newly allocated in-core inode coresponding to the given
* inode number.
*
* Initialize the inode's attributes and extent pointers if it
* already has them (it will not if the inode has no links).
*/
int
xfs_iread(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_ino_t ino,
xfs_inode_t **ipp,
xfs_daddr_t bno)
{
xfs_buf_t *bp;
xfs_dinode_t *dip;
xfs_inode_t *ip;
int error;
int alloc_mode = tp ? KM_SLEEP : KM_SLEEP_IO;
ASSERT(xfs_inode_zone != NULL);
ip = kmem_zone_zalloc(xfs_inode_zone, alloc_mode);
ip->i_ino = ino;
ip->i_dev = mp->m_dev;
ip->i_mount = mp;
/*
* Get pointer's to the on-disk inode and the buffer containing it.
* If the inode number refers to a block outside the file system
* then xfs_itobp() will return NULL. In this case we should
* return NULL as well. Set i_blkno to 0 so that xfs_itobp() will
* know that this is a new incore inode.
*/
error = xfs_itobp(mp, tp, ip, &dip, &bp, bno);
if (error != 0) {
kmem_zone_free(xfs_inode_zone, ip);
return error;
}
/*
* Initialize inode's trace buffers.
* Do this before xfs_iformat in case it adds entries.
*/
#ifdef XFS_BMAP_TRACE
ip->i_xtrace = ktrace_alloc(XFS_BMAP_KTRACE_SIZE, alloc_mode);
#endif
#ifdef XFS_BMBT_TRACE
ip->i_btrace = ktrace_alloc(XFS_BMBT_KTRACE_SIZE, alloc_mode);
#endif
#ifdef XFS_RW_TRACE
ip->i_rwtrace = ktrace_alloc(XFS_RW_KTRACE_SIZE, alloc_mode);
#endif
#ifdef XFS_STRAT_TRACE
ip->i_strat_trace = ktrace_alloc(XFS_STRAT_KTRACE_SIZE, alloc_mode);
#endif
#ifdef XFS_ILOCK_TRACE
ip->i_lock_trace = ktrace_alloc(XFS_ILOCK_KTRACE_SIZE, alloc_mode);
#endif
#ifdef XFS_DIR2_TRACE
ip->i_dir_trace = ktrace_alloc(XFS_DIR2_KTRACE_SIZE, alloc_mode);
#endif
/*
* If we got something that isn't an inode it means someone
* (nfs or dmi) has a stale handle.
*/
if (INT_GET(dip->di_core.di_magic, ARCH_CONVERT) != XFS_DINODE_MAGIC) {
kmem_zone_free(xfs_inode_zone, ip);
xfs_trans_brelse(tp, bp);
#ifdef DEBUG
xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: "
"dip->di_core.di_magic (0x%llx) != "
"XFS_DINODE_MAGIC (0x%llx)",
INT_GET(dip->di_core.di_magic, ARCH_CONVERT),
XFS_DINODE_MAGIC);
#endif /* DEBUG */
return XFS_ERROR(EINVAL);
}
/*
* If the on-disk inode is already linked to a directory
* entry, copy all of the inode into the in-core inode.
* xfs_iformat() handles copying in the inode format
* specific information.
* Otherwise, just get the truly permanent information.
*/
if (!INT_ISZERO(dip->di_core.di_mode, ARCH_CONVERT)) {
xfs_xlate_dinode_core((xfs_caddr_t)&dip->di_core,
&(ip->i_d), 1, ARCH_CONVERT);
error = xfs_iformat(ip, dip, alloc_mode);
if (error) {
kmem_zone_free(xfs_inode_zone, ip);
xfs_trans_brelse(tp, bp);
#ifdef DEBUG
xfs_fs_cmn_err(CE_ALERT, mp, "xfs_iread: "
"xfs_iformat() returned error %d",
error);
#endif /* DEBUG */
return error;
}
} else {
ip->i_d.di_magic = INT_GET(dip->di_core.di_magic, ARCH_CONVERT);
ip->i_d.di_version = INT_GET(dip->di_core.di_version, ARCH_CONVERT);
ip->i_d.di_gen = INT_GET(dip->di_core.di_gen, ARCH_CONVERT);
/*
* Make sure to pull in the mode here as well in
* case the inode is released without being used.
* This ensures that xfs_inactive() will see that
* the inode is already free and not try to mess
* with the uninitialized part of it.
*/
ip->i_d.di_mode = 0;
/*
* Initialize the per-fork minima and maxima for a new
* inode here. xfs_iformat will do it for old inodes.
*/
ip->i_df.if_ext_max =
XFS_IFORK_DSIZE(ip) / (uint)sizeof(xfs_bmbt_rec_t);
}
/*
* The inode format changed when we moved the link count and
* made it 32 bits long. If this is an old format inode,
* convert it in memory to look like a new one. If it gets
* flushed to disk we will convert back before flushing or
* logging it. We zero out the new projid field and the old link
* count field. We'll handle clearing the pad field (the remains
* of the old uuid field) when we actually convert the inode to
* the new format. We don't change the version number so that we
* can distinguish this from a real new format inode.
*/
if (ip->i_d.di_version == XFS_DINODE_VERSION_1) {
ip->i_d.di_nlink = ip->i_d.di_onlink;
ip->i_d.di_onlink = 0;
ip->i_d.di_projid = 0;
}
ip->i_delayed_blks = 0;
/*
* Mark the buffer containing the inode as something to keep
* around for a while. This helps to keep recently accessed
* meta-data in-core longer.
*/
XFS_BUF_SET_REF(bp, XFS_INO_REF);
/*
* Use xfs_trans_brelse() to release the buffer containing the
* on-disk inode, because it was acquired with xfs_trans_read_buf()
* in xfs_itobp() above. If tp is NULL, this is just a normal
* brelse(). If we're within a transaction, then xfs_trans_brelse()
* will only release the buffer if it is not dirty within the
* transaction. It will be OK to release the buffer in this case,
* because inodes on disk are never destroyed and we will be
* locking the new in-core inode before putting it in the hash
* table where other processes can find it. Thus we don't have
* to worry about the inode being changed just because we released
* the buffer.
*/
xfs_trans_brelse(tp, bp);
*ipp = ip;
return 0;
}
/*
* Read in extents from a btree-format inode.
* Allocate and fill in if_extents. Real work is done in xfs_bmap.c.
*/
int
xfs_iread_extents(
xfs_trans_t *tp,
xfs_inode_t *ip,
int whichfork)
{
int error;
xfs_ifork_t *ifp;
size_t size;
if (XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
return XFS_ERROR(EFSCORRUPTED);
size = XFS_IFORK_NEXTENTS(ip, whichfork) * (uint)sizeof(xfs_bmbt_rec_t);
ifp = XFS_IFORK_PTR(ip, whichfork);
/*
* We know that the size is legal (it's checked in iformat_btree)
*/
ifp->if_u1.if_extents = kmem_alloc(size, tp ? KM_SLEEP : KM_SLEEP_IO);
ASSERT(ifp->if_u1.if_extents != NULL);
ifp->if_lastex = NULLEXTNUM;
ifp->if_bytes = ifp->if_real_bytes = (int)size;
ifp->if_flags |= XFS_IFEXTENTS;
error = xfs_bmap_read_extents(tp, ip, whichfork);
if (error) {
kmem_free(ifp->if_u1.if_extents, size);
ifp->if_u1.if_extents = NULL;
ifp->if_bytes = ifp->if_real_bytes = 0;
ifp->if_flags &= ~XFS_IFEXTENTS;
return error;
}
xfs_validate_extents((xfs_bmbt_rec_32_t *)ifp->if_u1.if_extents,
XFS_IFORK_NEXTENTS(ip, whichfork), XFS_EXTFMT_INODE(ip));
return 0;
}
/*
* Reallocate the space for if_broot based on the number of records
* being added or deleted as indicated in rec_diff. Move the records
* and pointers in if_broot to fit the new size. When shrinking this
* will eliminate holes between the records and pointers created by
* the caller. When growing this will create holes to be filled in
* by the caller.
*
* The caller must not request to add more records than would fit in
* the on-disk inode root. If the if_broot is currently NULL, then
* if we adding records one will be allocated. The caller must also
* not request that the number of records go below zero, although
* it can go to zero.
*
* ip -- the inode whose if_broot area is changing
* ext_diff -- the change in the number of records, positive or negative,
* requested for the if_broot array.
*/
void
xfs_iroot_realloc(
xfs_inode_t *ip,
int rec_diff,
int whichfork)
{
int cur_max;
xfs_ifork_t *ifp;
xfs_bmbt_block_t *new_broot;
int new_max;
size_t new_size;
char *np;
char *op;
/*
* Handle the degenerate case quietly.
*/
if (rec_diff == 0) {
return;
}
ifp = XFS_IFORK_PTR(ip, whichfork);
if (rec_diff > 0) {
/*
* If there wasn't any memory allocated before, just
* allocate it now and get out.
*/
if (ifp->if_broot_bytes == 0) {
new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(rec_diff);
ifp->if_broot = (xfs_bmbt_block_t*)kmem_alloc(new_size,
KM_SLEEP);
ifp->if_broot_bytes = (int)new_size;
return;
}
/*
* If there is already an existing if_broot, then we need
* to realloc() it and shift the pointers to their new
* location. The records don't change location because
* they are kept butted up against the btree block header.
*/
cur_max = XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes);
new_max = cur_max + rec_diff;
new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max);
ifp->if_broot = (xfs_bmbt_block_t *)
kmem_realloc(ifp->if_broot,
new_size,
(size_t)XFS_BMAP_BROOT_SPACE_CALC(cur_max), /* old size */
KM_SLEEP);
op = (char *)XFS_BMAP_BROOT_PTR_ADDR(ifp->if_broot, 1,
ifp->if_broot_bytes);
np = (char *)XFS_BMAP_BROOT_PTR_ADDR(ifp->if_broot, 1,
(int)new_size);
ifp->if_broot_bytes = (int)new_size;
ASSERT(ifp->if_broot_bytes <=
XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ);
ovbcopy(op, np, cur_max * (uint)sizeof(xfs_dfsbno_t));
return;
}
/*
* rec_diff is less than 0. In this case, we are shrinking the
* if_broot buffer. It must already exist. If we go to zero
* records, just get rid of the root and clear the status bit.
*/
ASSERT((ifp->if_broot != NULL) && (ifp->if_broot_bytes > 0));
cur_max = XFS_BMAP_BROOT_MAXRECS(ifp->if_broot_bytes);
new_max = cur_max + rec_diff;
ASSERT(new_max >= 0);
if (new_max > 0)
new_size = (size_t)XFS_BMAP_BROOT_SPACE_CALC(new_max);
else
new_size = 0;
if (new_size > 0) {
new_broot = (xfs_bmbt_block_t *)kmem_alloc(new_size, KM_SLEEP);
/*
* First copy over the btree block header.
*/
bcopy(ifp->if_broot, new_broot, sizeof(xfs_bmbt_block_t));
} else {
new_broot = NULL;
ifp->if_flags &= ~XFS_IFBROOT;
}
/*
* Only copy the records and pointers if there are any.
*/
if (new_max > 0) {
/*
* First copy the records.
*/
op = (char *)XFS_BMAP_BROOT_REC_ADDR(ifp->if_broot, 1,
ifp->if_broot_bytes);
np = (char *)XFS_BMAP_BROOT_REC_ADDR(new_broot, 1,
(int)new_size);
bcopy(op, np, new_max * (uint)sizeof(xfs_bmbt_rec_t));
/*
* Then copy the pointers.
*/
op = (char *)XFS_BMAP_BROOT_PTR_ADDR(ifp->if_broot, 1,
ifp->if_broot_bytes);
np = (char *)XFS_BMAP_BROOT_PTR_ADDR(new_broot, 1,
(int)new_size);
bcopy(op, np, new_max * (uint)sizeof(xfs_dfsbno_t));
}
kmem_free(ifp->if_broot, ifp->if_broot_bytes);
ifp->if_broot = new_broot;
ifp->if_broot_bytes = (int)new_size;
ASSERT(ifp->if_broot_bytes <=
XFS_IFORK_SIZE(ip, whichfork) + XFS_BROOT_SIZE_ADJ);
return;
}
/*
* This is called when the amount of space needed for if_extents
* is increased or decreased. The change in size is indicated by
* the number of extents that need to be added or deleted in the
* ext_diff parameter.
*
* If the amount of space needed has decreased below the size of the
* inline buffer, then switch to using the inline buffer. Otherwise,
* use kmem_realloc() or kmem_alloc() to adjust the size of the buffer
* to what is needed.
*
* ip -- the inode whose if_extents area is changing
* ext_diff -- the change in the number of extents, positive or negative,
* requested for the if_extents array.
*/
void
xfs_iext_realloc(
xfs_inode_t *ip,
int ext_diff,
int whichfork)
{
int byte_diff;
xfs_ifork_t *ifp;
int new_size;
uint rnew_size;
if (ext_diff == 0) {
return;
}
ifp = XFS_IFORK_PTR(ip, whichfork);
byte_diff = ext_diff * (uint)sizeof(xfs_bmbt_rec_t);
new_size = (int)ifp->if_bytes + byte_diff;
ASSERT(new_size >= 0);
if (new_size == 0) {
if (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext) {
ASSERT(ifp->if_real_bytes != 0);
kmem_free(ifp->if_u1.if_extents, ifp->if_real_bytes);
}
ifp->if_u1.if_extents = NULL;
rnew_size = 0;
} else if (new_size <= sizeof(ifp->if_u2.if_inline_ext)) {
/*
* If the valid extents can fit in if_inline_ext,
* copy them from the malloc'd vector and free it.
*/
if (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext) {
/*
* For now, empty files are format EXTENTS,
* so the if_extents pointer is null.
*/
if (ifp->if_u1.if_extents) {
bcopy(ifp->if_u1.if_extents,
ifp->if_u2.if_inline_ext, new_size);
kmem_free(ifp->if_u1.if_extents,
ifp->if_real_bytes);
}
ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
}
rnew_size = 0;
} else {
rnew_size = new_size;
if ((rnew_size & (rnew_size - 1)) != 0)
rnew_size = xfs_iroundup(rnew_size);
/*
* Stuck with malloc/realloc.
*/
if (ifp->if_u1.if_extents == ifp->if_u2.if_inline_ext) {
ifp->if_u1.if_extents = (xfs_bmbt_rec_t *)
kmem_alloc(rnew_size, KM_SLEEP);
bcopy(ifp->if_u2.if_inline_ext, ifp->if_u1.if_extents,
sizeof(ifp->if_u2.if_inline_ext));
} else if (rnew_size != ifp->if_real_bytes) {
ifp->if_u1.if_extents = (xfs_bmbt_rec_t *)
kmem_realloc(ifp->if_u1.if_extents,
rnew_size,
ifp->if_real_bytes,
KM_SLEEP);
}
}
ifp->if_real_bytes = rnew_size;
ifp->if_bytes = new_size;
}
/*
* This is called when the amount of space needed for if_data
* is increased or decreased. The change in size is indicated by
* the number of bytes that need to be added or deleted in the
* byte_diff parameter.
*
* If the amount of space needed has decreased below the size of the
* inline buffer, then switch to using the inline buffer. Otherwise,
* use kmem_realloc() or kmem_alloc() to adjust the size of the buffer
* to what is needed.
*
* ip -- the inode whose if_data area is changing
* byte_diff -- the change in the number of bytes, positive or negative,
* requested for the if_data array.
*/
void
xfs_idata_realloc(
xfs_inode_t *ip,
int byte_diff,
int whichfork)
{
xfs_ifork_t *ifp;
int new_size;
int real_size;
if (byte_diff == 0) {
return;
}
ifp = XFS_IFORK_PTR(ip, whichfork);
new_size = (int)ifp->if_bytes + byte_diff;
ASSERT(new_size >= 0);
if (new_size == 0) {
if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) {
kmem_free(ifp->if_u1.if_data, ifp->if_real_bytes);
}
ifp->if_u1.if_data = NULL;
real_size = 0;
} else if (new_size <= sizeof(ifp->if_u2.if_inline_data)) {
/*
* If the valid extents/data can fit in if_inline_ext/data,
* copy them from the malloc'd vector and free it.
*/
if (ifp->if_u1.if_data == NULL) {
ifp->if_u1.if_data = ifp->if_u2.if_inline_data;
} else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) {
ASSERT(ifp->if_real_bytes != 0);
bcopy(ifp->if_u1.if_data, ifp->if_u2.if_inline_data,
new_size);
kmem_free(ifp->if_u1.if_data, ifp->if_real_bytes);
ifp->if_u1.if_data = ifp->if_u2.if_inline_data;
}
real_size = 0;
} else {
/*
* Stuck with malloc/realloc.
* For inline data, the underlying buffer must be
* a multiple of 4 bytes in size so that it can be
* logged and stay on word boundaries. We enforce
* that here.
*/
real_size = roundup(new_size, 4);
if (ifp->if_u1.if_data == NULL) {
ASSERT(ifp->if_real_bytes == 0);
ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP);
} else if (ifp->if_u1.if_data != ifp->if_u2.if_inline_data) {
/*
* Only do the realloc if the underlying size
* is really changing.
*/
if (ifp->if_real_bytes != real_size) {
ifp->if_u1.if_data =
kmem_realloc(ifp->if_u1.if_data,
real_size,
ifp->if_real_bytes,
KM_SLEEP);
}
} else {
ASSERT(ifp->if_real_bytes == 0);
ifp->if_u1.if_data = kmem_alloc(real_size, KM_SLEEP);
bcopy(ifp->if_u2.if_inline_data, ifp->if_u1.if_data,
ifp->if_bytes);
}
}
ifp->if_real_bytes = real_size;
ifp->if_bytes = new_size;
ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork));
}
/*
* Map inode to disk block and offset.
*
* mp -- the mount point structure for the current file system
* tp -- the current transaction
* ino -- the inode number of the inode to be located
* imap -- this structure is filled in with the information necessary
* to retrieve the given inode from disk
* flags -- flags to pass to xfs_dilocate indicating whether or not
* lookups in the inode btree were OK or not
*/
int
xfs_imap(
xfs_mount_t *mp,
xfs_trans_t *tp,
xfs_ino_t ino,
xfs_imap_t *imap,
uint flags)
{
xfs_fsblock_t fsbno;
int len;
int off;
int error;
fsbno = imap->im_blkno ?
XFS_DADDR_TO_FSB(mp, imap->im_blkno) : NULLFSBLOCK;
error = xfs_dilocate(mp, tp, ino, &fsbno, &len, &off, flags);
if (error != 0) {
return error;
}
imap->im_blkno = XFS_FSB_TO_DADDR(mp, fsbno);
imap->im_len = XFS_FSB_TO_BB(mp, len);
imap->im_agblkno = XFS_FSB_TO_AGBNO(mp, fsbno);
imap->im_ioffset = (ushort)off;
imap->im_boffset = (ushort)(off << mp->m_sb.sb_inodelog);
return 0;
}
void
xfs_idestroy_fork(
xfs_inode_t *ip,
int whichfork)
{
xfs_ifork_t *ifp;
ifp = XFS_IFORK_PTR(ip, whichfork);
if (ifp->if_broot != NULL) {
kmem_free(ifp->if_broot, ifp->if_broot_bytes);
ifp->if_broot = NULL;
}
/*
* If the format is local, then we can't have an extents
* array so just look for an inline data array. If we're
* not local then we may or may not have an extents list,
* so check and free it up if we do.
*/
if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_LOCAL) {
if ((ifp->if_u1.if_data != ifp->if_u2.if_inline_data) &&
(ifp->if_u1.if_data != NULL)) {
ASSERT(ifp->if_real_bytes != 0);
kmem_free(ifp->if_u1.if_data, ifp->if_real_bytes);
ifp->if_u1.if_data = NULL;
ifp->if_real_bytes = 0;
}
} else if ((ifp->if_flags & XFS_IFEXTENTS) &&
(ifp->if_u1.if_extents != NULL) &&
(ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext)) {
ASSERT(ifp->if_real_bytes != 0);
kmem_free(ifp->if_u1.if_extents, ifp->if_real_bytes);
ifp->if_u1.if_extents = NULL;
ifp->if_real_bytes = 0;
}
ASSERT(ifp->if_u1.if_extents == NULL ||
ifp->if_u1.if_extents == ifp->if_u2.if_inline_ext);
ASSERT(ifp->if_real_bytes == 0);
if (whichfork == XFS_ATTR_FORK) {
kmem_zone_free(xfs_ifork_zone, ip->i_afp);
ip->i_afp = NULL;
}
}
/*
* xfs_iroundup: round up argument to next power of two
*/
uint
xfs_iroundup(
uint v)
{
int i;
uint m;
if ((v & (v - 1)) == 0)
return v;
ASSERT((v & 0x80000000) == 0);
if ((v & (v + 1)) == 0)
return v + 1;
for (i = 0, m = 1; i < 31; i++, m <<= 1) {
if (v & m)
continue;
v |= m;
if ((v & (v + 1)) == 0)
return v + 1;
}
ASSERT(0);
return( 0 );
}
/*
* xfs_iextents_copy()
*
* This is called to copy the REAL extents (as opposed to the delayed
* allocation extents) from the inode into the given buffer. It
* returns the number of bytes copied into the buffer.
*
* If there are no delayed allocation extents, then we can just
* bcopy() the extents into the buffer. Otherwise, we need to
* examine each extent in turn and skip those which are delayed.
*/
int
xfs_iextents_copy(
xfs_inode_t *ip,
xfs_bmbt_rec_32_t *buffer,
int whichfork)
{
int copied;
xfs_bmbt_rec_32_t *dest_ep;
xfs_bmbt_rec_t *ep;
#ifdef DEBUG
xfs_exntfmt_t fmt = XFS_EXTFMT_INODE(ip);
#endif
#ifdef XFS_BMAP_TRACE
static char fname[] = "xfs_iextents_copy";
#endif
int i;
xfs_ifork_t *ifp;
int nrecs;
xfs_fsblock_t start_block;
ifp = XFS_IFORK_PTR(ip, whichfork);
ASSERT(ismrlocked(&ip->i_lock, MR_UPDATE|MR_ACCESS));
ASSERT(ifp->if_bytes > 0);
nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
xfs_bmap_trace_exlist(fname, ip, nrecs, whichfork);
ASSERT(nrecs > 0);
if (nrecs == XFS_IFORK_NEXTENTS(ip, whichfork)) {
/*
* There are no delayed allocation extents,
* so just copy everything.
*/
ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork));
ASSERT(ifp->if_bytes ==
(XFS_IFORK_NEXTENTS(ip, whichfork) *
(uint)sizeof(xfs_bmbt_rec_t)));
bcopy(ifp->if_u1.if_extents, buffer, ifp->if_bytes);
xfs_validate_extents(buffer, nrecs, fmt);
return ifp->if_bytes;
}
ASSERT(whichfork == XFS_DATA_FORK);
/*
* There are some delayed allocation extents in the
* inode, so copy the extents one at a time and skip
* the delayed ones. There must be at least one
* non-delayed extent.
*/
ASSERT(nrecs > ip->i_d.di_nextents);
ep = ifp->if_u1.if_extents;
dest_ep = buffer;
copied = 0;
for (i = 0; i < nrecs; i++) {
start_block = xfs_bmbt_get_startblock(ep);
if (ISNULLSTARTBLOCK(start_block)) {
/*
* It's a delayed allocation extent, so skip it.
*/
ep++;
continue;
}
*dest_ep = *(xfs_bmbt_rec_32_t *)ep;
dest_ep++;
ep++;
copied++;
}
ASSERT(copied != 0);
ASSERT(copied == ip->i_d.di_nextents);
ASSERT((copied * (uint)sizeof(xfs_bmbt_rec_t)) <= XFS_IFORK_DSIZE(ip));
xfs_validate_extents(buffer, copied, fmt);
return (copied * (uint)sizeof(xfs_bmbt_rec_t));
}
/*
* Each of the following cases stores data into the same region
* of the on-disk inode, so only one of them can be valid at
* any given time. While it is possible to have conflicting formats
* and log flags, e.g. having XFS_ILOG_?DATA set when the fork is
* in EXTENTS format, this can only happen when the fork has
* changed formats after being modified but before being flushed.
* In these cases, the format always takes precedence, because the
* format indicates the current state of the fork.
*/
STATIC int
xfs_iflush_fork(
xfs_inode_t *ip,
xfs_dinode_t *dip,
xfs_inode_log_item_t *iip,
int whichfork,
xfs_buf_t *bp)
{
char *cp;
xfs_ifork_t *ifp;
xfs_mount_t *mp;
#ifdef XFS_TRANS_DEBUG
int first;
#endif
static const short brootflag[2] =
{ XFS_ILOG_DBROOT, XFS_ILOG_ABROOT };
static const short dataflag[2] =
{ XFS_ILOG_DDATA, XFS_ILOG_ADATA };
static const short extflag[2] =
{ XFS_ILOG_DEXT, XFS_ILOG_AEXT };
if (iip == NULL)
return 0;
ifp = XFS_IFORK_PTR(ip, whichfork);
/*
* This can happen if we gave up in iformat in an error path,
* for the attribute fork.
*/
if (ifp == NULL) {
ASSERT(whichfork == XFS_ATTR_FORK);
return 0;
}
cp = XFS_DFORK_PTR_ARCH(dip, whichfork, ARCH_CONVERT);
mp = ip->i_mount;
switch (XFS_IFORK_FORMAT(ip, whichfork)) {
case XFS_DINODE_FMT_LOCAL:
if ((iip->ili_format.ilf_fields & dataflag[whichfork]) &&
(ifp->if_bytes > 0)) {
ASSERT(ifp->if_u1.if_data != NULL);
ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork));
bcopy(ifp->if_u1.if_data, cp, ifp->if_bytes);
}
if (whichfork == XFS_DATA_FORK) {
if (XFS_DIR_SHORTFORM_VALIDATE_ONDISK(mp, dip)) {
return XFS_ERROR(EFSCORRUPTED);
}
}
break;
case XFS_DINODE_FMT_EXTENTS:
ASSERT((ifp->if_flags & XFS_IFEXTENTS) ||
!(iip->ili_format.ilf_fields & extflag[whichfork]));
ASSERT((ifp->if_u1.if_extents != NULL) || (ifp->if_bytes == 0));
ASSERT((ifp->if_u1.if_extents == NULL) || (ifp->if_bytes > 0));
if ((iip->ili_format.ilf_fields & extflag[whichfork]) &&
(ifp->if_bytes > 0)) {
ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0);
(void)xfs_iextents_copy(ip, (xfs_bmbt_rec_32_t *)cp,
whichfork);
}
break;
case XFS_DINODE_FMT_BTREE:
if ((iip->ili_format.ilf_fields & brootflag[whichfork]) &&
(ifp->if_broot_bytes > 0)) {
ASSERT(ifp->if_broot != NULL);
ASSERT(ifp->if_broot_bytes <=
(XFS_IFORK_SIZE(ip, whichfork) +
XFS_BROOT_SIZE_ADJ));
xfs_bmbt_to_bmdr(ifp->if_broot, ifp->if_broot_bytes,
(xfs_bmdr_block_t *)cp,
XFS_DFORK_SIZE_ARCH(dip, mp, whichfork, ARCH_CONVERT));
}
break;
case XFS_DINODE_FMT_DEV:
if (iip->ili_format.ilf_fields & XFS_ILOG_DEV) {
ASSERT(whichfork == XFS_DATA_FORK);
INT_SET(dip->di_u.di_dev, ARCH_CONVERT, ip->i_df.if_u2.if_rdev);
}
break;
case XFS_DINODE_FMT_UUID:
if (iip->ili_format.ilf_fields & XFS_ILOG_UUID) {
ASSERT(whichfork == XFS_DATA_FORK);
bcopy(&ip->i_df.if_u2.if_uuid, &dip->di_u.di_muuid,
sizeof(uuid_t));
}
break;
default:
ASSERT(0);
break;
}
return 0;
}
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