#include "xfs.h"
#include "xfs_fs.h"
-#include "xfs_types.h"
+#include "xfs_format.h"
#include "xfs_log.h"
#include "xfs_inum.h"
#include "xfs_trans.h"
#include "xfs_trace.h"
#include "xfs_icache.h"
-kmem_zone_t *xfs_ifork_zone;
kmem_zone_t *xfs_inode_zone;
/*
#define XFS_ITRUNC_MAX_EXTENTS 2
STATIC int xfs_iflush_int(xfs_inode_t *, xfs_buf_t *);
-STATIC int xfs_iformat_local(xfs_inode_t *, xfs_dinode_t *, int, int);
-STATIC int xfs_iformat_extents(xfs_inode_t *, xfs_dinode_t *, int);
-STATIC int xfs_iformat_btree(xfs_inode_t *, xfs_dinode_t *, int);
/*
* helper function to extract extent size hint from inode
finish_wait(wq, &wait.wait);
}
-#ifdef DEBUG
-/*
- * Make sure that the extents in the given memory buffer
- * are valid.
- */
-STATIC void
-xfs_validate_extents(
- xfs_ifork_t *ifp,
- int nrecs,
- xfs_exntfmt_t fmt)
-{
- xfs_bmbt_irec_t irec;
- xfs_bmbt_rec_host_t rec;
- int i;
-
- for (i = 0; i < nrecs; i++) {
- xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i);
- rec.l0 = get_unaligned(&ep->l0);
- rec.l1 = get_unaligned(&ep->l1);
- xfs_bmbt_get_all(&rec, &irec);
- if (fmt == XFS_EXTFMT_NOSTATE)
- ASSERT(irec.br_state == XFS_EXT_NORM);
- }
-}
-#else /* DEBUG */
-#define xfs_validate_extents(ifp, nrecs, fmt)
-#endif /* DEBUG */
-
-/*
- * Check that none of the inode's in the buffer have a next
- * unlinked field of 0.
- */
-#if defined(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 (!dip->di_next_unlinked) {
- xfs_alert(mp,
- "Detected bogus zero next_unlinked field in incore inode buffer 0x%p.",
- bp);
- ASSERT(dip->di_next_unlinked);
- }
- }
-}
-#endif
-
-static void
-xfs_inode_buf_verify(
- struct xfs_buf *bp)
-{
- struct xfs_mount *mp = bp->b_target->bt_mount;
- int i;
- int ni;
-
- /*
- * Validate the magic number and version of every inode in the buffer
- */
- ni = XFS_BB_TO_FSB(mp, bp->b_length) * mp->m_sb.sb_inopblock;
- for (i = 0; i < ni; i++) {
- int di_ok;
- xfs_dinode_t *dip;
-
- dip = (struct xfs_dinode *)xfs_buf_offset(bp,
- (i << mp->m_sb.sb_inodelog));
- di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) &&
- XFS_DINODE_GOOD_VERSION(dip->di_version);
- if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
- XFS_ERRTAG_ITOBP_INOTOBP,
- XFS_RANDOM_ITOBP_INOTOBP))) {
- xfs_buf_ioerror(bp, EFSCORRUPTED);
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_HIGH,
- mp, dip);
-#ifdef DEBUG
- xfs_emerg(mp,
- "bad inode magic/vsn daddr %lld #%d (magic=%x)",
- (unsigned long long)bp->b_bn, i,
- be16_to_cpu(dip->di_magic));
- ASSERT(0);
-#endif
- }
- }
- xfs_inobp_check(mp, bp);
-}
-
-
-static void
-xfs_inode_buf_read_verify(
- struct xfs_buf *bp)
-{
- xfs_inode_buf_verify(bp);
-}
-
-static void
-xfs_inode_buf_write_verify(
- struct xfs_buf *bp)
-{
- xfs_inode_buf_verify(bp);
-}
-
-const struct xfs_buf_ops xfs_inode_buf_ops = {
- .verify_read = xfs_inode_buf_read_verify,
- .verify_write = xfs_inode_buf_write_verify,
-};
-
-
-/*
- * 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 dipp 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.
- */
-int
-xfs_imap_to_bp(
- struct xfs_mount *mp,
- struct xfs_trans *tp,
- struct xfs_imap *imap,
- struct xfs_dinode **dipp,
- struct xfs_buf **bpp,
- uint buf_flags,
- uint iget_flags)
-{
- struct xfs_buf *bp;
- int error;
-
- buf_flags |= XBF_UNMAPPED;
- error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, imap->im_blkno,
- (int)imap->im_len, buf_flags, &bp,
- &xfs_inode_buf_ops);
- if (error) {
- if (error == EAGAIN) {
- ASSERT(buf_flags & XBF_TRYLOCK);
- return error;
- }
-
- if (error == EFSCORRUPTED &&
- (iget_flags & XFS_IGET_UNTRUSTED))
- return XFS_ERROR(EINVAL);
-
- xfs_warn(mp, "%s: xfs_trans_read_buf() returned error %d.",
- __func__, error);
- return error;
- }
-
- *bpp = bp;
- *dipp = (struct xfs_dinode *)xfs_buf_offset(bp, imap->im_boffset);
- 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)
-{
- xfs_attr_shortform_t *atp;
- int size;
- int error = 0;
- xfs_fsize_t di_size;
-
- if (unlikely(be32_to_cpu(dip->di_nextents) +
- be16_to_cpu(dip->di_anextents) >
- be64_to_cpu(dip->di_nblocks))) {
- xfs_warn(ip->i_mount,
- "corrupt dinode %Lu, extent total = %d, nblocks = %Lu.",
- (unsigned long long)ip->i_ino,
- (int)(be32_to_cpu(dip->di_nextents) +
- be16_to_cpu(dip->di_anextents)),
- (unsigned long long)
- be64_to_cpu(dip->di_nblocks));
- XFS_CORRUPTION_ERROR("xfs_iformat(1)", XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- if (unlikely(dip->di_forkoff > ip->i_mount->m_sb.sb_inodesize)) {
- xfs_warn(ip->i_mount, "corrupt dinode %Lu, forkoff = 0x%x.",
- (unsigned long long)ip->i_ino,
- dip->di_forkoff);
- XFS_CORRUPTION_ERROR("xfs_iformat(2)", XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- if (unlikely((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) &&
- !ip->i_mount->m_rtdev_targp)) {
- xfs_warn(ip->i_mount,
- "corrupt dinode %Lu, has realtime flag set.",
- ip->i_ino);
- XFS_CORRUPTION_ERROR("xfs_iformat(realtime)",
- XFS_ERRLEVEL_LOW, ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- switch (ip->i_d.di_mode & S_IFMT) {
- case S_IFIFO:
- case S_IFCHR:
- case S_IFBLK:
- case S_IFSOCK:
- if (unlikely(dip->di_format != XFS_DINODE_FMT_DEV)) {
- XFS_CORRUPTION_ERROR("xfs_iformat(3)", XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
- ip->i_d.di_size = 0;
- ip->i_df.if_u2.if_rdev = xfs_dinode_get_rdev(dip);
- break;
-
- case S_IFREG:
- case S_IFLNK:
- case S_IFDIR:
- switch (dip->di_format) {
- case XFS_DINODE_FMT_LOCAL:
- /*
- * no local regular files yet
- */
- if (unlikely(S_ISREG(be16_to_cpu(dip->di_mode)))) {
- xfs_warn(ip->i_mount,
- "corrupt inode %Lu (local format for regular file).",
- (unsigned long long) ip->i_ino);
- XFS_CORRUPTION_ERROR("xfs_iformat(4)",
- XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- di_size = be64_to_cpu(dip->di_size);
- if (unlikely(di_size > XFS_DFORK_DSIZE(dip, ip->i_mount))) {
- xfs_warn(ip->i_mount,
- "corrupt inode %Lu (bad size %Ld for local inode).",
- (unsigned long long) ip->i_ino,
- (long long) di_size);
- XFS_CORRUPTION_ERROR("xfs_iformat(5)",
- XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- size = (int)di_size;
- error = xfs_iformat_local(ip, dip, XFS_DATA_FORK, size);
- break;
- case XFS_DINODE_FMT_EXTENTS:
- error = xfs_iformat_extents(ip, dip, XFS_DATA_FORK);
- break;
- case XFS_DINODE_FMT_BTREE:
- error = xfs_iformat_btree(ip, dip, XFS_DATA_FORK);
- break;
- default:
- XFS_ERROR_REPORT("xfs_iformat(6)", XFS_ERRLEVEL_LOW,
- ip->i_mount);
- return XFS_ERROR(EFSCORRUPTED);
- }
- break;
-
- default:
- XFS_ERROR_REPORT("xfs_iformat(7)", XFS_ERRLEVEL_LOW, ip->i_mount);
- return XFS_ERROR(EFSCORRUPTED);
- }
- if (error) {
- return error;
- }
- if (!XFS_DFORK_Q(dip))
- return 0;
-
- ASSERT(ip->i_afp == NULL);
- ip->i_afp = kmem_zone_zalloc(xfs_ifork_zone, KM_SLEEP | KM_NOFS);
-
- switch (dip->di_aformat) {
- case XFS_DINODE_FMT_LOCAL:
- atp = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip);
- size = be16_to_cpu(atp->hdr.totsize);
-
- if (unlikely(size < sizeof(struct xfs_attr_sf_hdr))) {
- xfs_warn(ip->i_mount,
- "corrupt inode %Lu (bad attr fork size %Ld).",
- (unsigned long long) ip->i_ino,
- (long long) size);
- XFS_CORRUPTION_ERROR("xfs_iformat(8)",
- XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- error = xfs_iformat_local(ip, dip, XFS_ATTR_FORK, size);
- break;
- case XFS_DINODE_FMT_EXTENTS:
- error = xfs_iformat_extents(ip, dip, XFS_ATTR_FORK);
- break;
- case XFS_DINODE_FMT_BTREE:
- error = xfs_iformat_btree(ip, dip, XFS_ATTR_FORK);
- 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)
-{
- 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 memcpy() below.
- */
- if (unlikely(size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) {
- xfs_warn(ip->i_mount,
- "corrupt inode %Lu (bad size %d for local fork, size = %d).",
- (unsigned long long) ip->i_ino, size,
- XFS_DFORK_SIZE(dip, ip->i_mount, whichfork));
- XFS_CORRUPTION_ERROR("xfs_iformat_local", XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- 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, KM_SLEEP | KM_NOFS);
- }
- ifp->if_bytes = size;
- ifp->if_real_bytes = real_size;
- if (size)
- memcpy(ifp->if_u1.if_data, XFS_DFORK_PTR(dip, whichfork), 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)
-{
- xfs_bmbt_rec_t *dp;
- xfs_ifork_t *ifp;
- int nex;
- int size;
- int i;
-
- ifp = XFS_IFORK_PTR(ip, whichfork);
- nex = XFS_DFORK_NEXTENTS(dip, whichfork);
- 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 memcpy() below.
- */
- if (unlikely(size < 0 || size > XFS_DFORK_SIZE(dip, ip->i_mount, whichfork))) {
- xfs_warn(ip->i_mount, "corrupt inode %Lu ((a)extents = %d).",
- (unsigned long long) ip->i_ino, nex);
- XFS_CORRUPTION_ERROR("xfs_iformat_extents(1)", XFS_ERRLEVEL_LOW,
- ip->i_mount, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- ifp->if_real_bytes = 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
- xfs_iext_add(ifp, 0, nex);
-
- ifp->if_bytes = size;
- if (size) {
- dp = (xfs_bmbt_rec_t *) XFS_DFORK_PTR(dip, whichfork);
- xfs_validate_extents(ifp, nex, XFS_EXTFMT_INODE(ip));
- for (i = 0; i < nex; i++, dp++) {
- xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i);
- ep->l0 = get_unaligned_be64(&dp->l0);
- ep->l1 = get_unaligned_be64(&dp->l1);
- }
- XFS_BMAP_TRACE_EXLIST(ip, nex, whichfork);
- if (whichfork != XFS_DATA_FORK ||
- XFS_EXTFMT_INODE(ip) == XFS_EXTFMT_NOSTATE)
- if (unlikely(xfs_check_nostate_extents(
- ifp, 0, nex))) {
- XFS_ERROR_REPORT("xfs_iformat_extents(2)",
- XFS_ERRLEVEL_LOW,
- ip->i_mount);
- 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)
-{
- struct xfs_mount *mp = ip->i_mount;
- 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(dip, whichfork);
- size = XFS_BMAP_BROOT_SPACE(mp, dfp);
- nrecs = be16_to_cpu(dfp->bb_numrecs);
-
- /*
- * 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 (unlikely(XFS_IFORK_NEXTENTS(ip, whichfork) <=
- XFS_IFORK_MAXEXT(ip, whichfork) ||
- XFS_BMDR_SPACE_CALC(nrecs) >
- XFS_DFORK_SIZE(dip, mp, whichfork) ||
- XFS_IFORK_NEXTENTS(ip, whichfork) > ip->i_d.di_nblocks)) {
- xfs_warn(mp, "corrupt inode %Lu (btree).",
- (unsigned long long) ip->i_ino);
- XFS_CORRUPTION_ERROR("xfs_iformat_btree", XFS_ERRLEVEL_LOW,
- mp, dip);
- return XFS_ERROR(EFSCORRUPTED);
- }
-
- ifp->if_broot_bytes = size;
- ifp->if_broot = kmem_alloc(size, KM_SLEEP | KM_NOFS);
- ASSERT(ifp->if_broot != NULL);
- /*
- * Copy and convert from the on-disk structure
- * to the in-memory structure.
- */
- xfs_bmdr_to_bmbt(ip, dfp, XFS_DFORK_SIZE(dip, ip->i_mount, whichfork),
- ifp->if_broot, size);
- ifp->if_flags &= ~XFS_IFEXTENTS;
- ifp->if_flags |= XFS_IFBROOT;
-
- return 0;
-}
-
-STATIC void
-xfs_dinode_from_disk(
- xfs_icdinode_t *to,
- xfs_dinode_t *from)
-{
- to->di_magic = be16_to_cpu(from->di_magic);
- to->di_mode = be16_to_cpu(from->di_mode);
- to->di_version = from ->di_version;
- to->di_format = from->di_format;
- to->di_onlink = be16_to_cpu(from->di_onlink);
- to->di_uid = be32_to_cpu(from->di_uid);
- to->di_gid = be32_to_cpu(from->di_gid);
- to->di_nlink = be32_to_cpu(from->di_nlink);
- to->di_projid_lo = be16_to_cpu(from->di_projid_lo);
- to->di_projid_hi = be16_to_cpu(from->di_projid_hi);
- memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
- to->di_flushiter = be16_to_cpu(from->di_flushiter);
- to->di_atime.t_sec = be32_to_cpu(from->di_atime.t_sec);
- to->di_atime.t_nsec = be32_to_cpu(from->di_atime.t_nsec);
- to->di_mtime.t_sec = be32_to_cpu(from->di_mtime.t_sec);
- to->di_mtime.t_nsec = be32_to_cpu(from->di_mtime.t_nsec);
- to->di_ctime.t_sec = be32_to_cpu(from->di_ctime.t_sec);
- to->di_ctime.t_nsec = be32_to_cpu(from->di_ctime.t_nsec);
- to->di_size = be64_to_cpu(from->di_size);
- to->di_nblocks = be64_to_cpu(from->di_nblocks);
- to->di_extsize = be32_to_cpu(from->di_extsize);
- to->di_nextents = be32_to_cpu(from->di_nextents);
- to->di_anextents = be16_to_cpu(from->di_anextents);
- to->di_forkoff = from->di_forkoff;
- to->di_aformat = from->di_aformat;
- to->di_dmevmask = be32_to_cpu(from->di_dmevmask);
- to->di_dmstate = be16_to_cpu(from->di_dmstate);
- to->di_flags = be16_to_cpu(from->di_flags);
- to->di_gen = be32_to_cpu(from->di_gen);
-
- if (to->di_version == 3) {
- to->di_changecount = be64_to_cpu(from->di_changecount);
- to->di_crtime.t_sec = be32_to_cpu(from->di_crtime.t_sec);
- to->di_crtime.t_nsec = be32_to_cpu(from->di_crtime.t_nsec);
- to->di_flags2 = be64_to_cpu(from->di_flags2);
- to->di_ino = be64_to_cpu(from->di_ino);
- to->di_lsn = be64_to_cpu(from->di_lsn);
- memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
- uuid_copy(&to->di_uuid, &from->di_uuid);
- }
-}
-
-void
-xfs_dinode_to_disk(
- xfs_dinode_t *to,
- xfs_icdinode_t *from)
-{
- to->di_magic = cpu_to_be16(from->di_magic);
- to->di_mode = cpu_to_be16(from->di_mode);
- to->di_version = from ->di_version;
- to->di_format = from->di_format;
- to->di_onlink = cpu_to_be16(from->di_onlink);
- to->di_uid = cpu_to_be32(from->di_uid);
- to->di_gid = cpu_to_be32(from->di_gid);
- to->di_nlink = cpu_to_be32(from->di_nlink);
- to->di_projid_lo = cpu_to_be16(from->di_projid_lo);
- to->di_projid_hi = cpu_to_be16(from->di_projid_hi);
- memcpy(to->di_pad, from->di_pad, sizeof(to->di_pad));
- to->di_flushiter = cpu_to_be16(from->di_flushiter);
- to->di_atime.t_sec = cpu_to_be32(from->di_atime.t_sec);
- to->di_atime.t_nsec = cpu_to_be32(from->di_atime.t_nsec);
- to->di_mtime.t_sec = cpu_to_be32(from->di_mtime.t_sec);
- to->di_mtime.t_nsec = cpu_to_be32(from->di_mtime.t_nsec);
- to->di_ctime.t_sec = cpu_to_be32(from->di_ctime.t_sec);
- to->di_ctime.t_nsec = cpu_to_be32(from->di_ctime.t_nsec);
- to->di_size = cpu_to_be64(from->di_size);
- to->di_nblocks = cpu_to_be64(from->di_nblocks);
- to->di_extsize = cpu_to_be32(from->di_extsize);
- to->di_nextents = cpu_to_be32(from->di_nextents);
- to->di_anextents = cpu_to_be16(from->di_anextents);
- to->di_forkoff = from->di_forkoff;
- to->di_aformat = from->di_aformat;
- to->di_dmevmask = cpu_to_be32(from->di_dmevmask);
- to->di_dmstate = cpu_to_be16(from->di_dmstate);
- to->di_flags = cpu_to_be16(from->di_flags);
- to->di_gen = cpu_to_be32(from->di_gen);
-
- if (from->di_version == 3) {
- to->di_changecount = cpu_to_be64(from->di_changecount);
- to->di_crtime.t_sec = cpu_to_be32(from->di_crtime.t_sec);
- to->di_crtime.t_nsec = cpu_to_be32(from->di_crtime.t_nsec);
- to->di_flags2 = cpu_to_be64(from->di_flags2);
- to->di_ino = cpu_to_be64(from->di_ino);
- to->di_lsn = cpu_to_be64(from->di_lsn);
- memcpy(to->di_pad2, from->di_pad2, sizeof(to->di_pad2));
- uuid_copy(&to->di_uuid, &from->di_uuid);
- }
-}
-
STATIC uint
_xfs_dic2xflags(
__uint16_t di_flags)
(XFS_DFORK_Q(dip) ? XFS_XFLAG_HASATTR : 0);
}
-static bool
-xfs_dinode_verify(
- struct xfs_mount *mp,
- struct xfs_inode *ip,
- struct xfs_dinode *dip)
-{
- if (dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))
- return false;
-
- /* only version 3 or greater inodes are extensively verified here */
- if (dip->di_version < 3)
- return true;
-
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return false;
- if (!xfs_verify_cksum((char *)dip, mp->m_sb.sb_inodesize,
- offsetof(struct xfs_dinode, di_crc)))
- return false;
- if (be64_to_cpu(dip->di_ino) != ip->i_ino)
- return false;
- if (!uuid_equal(&dip->di_uuid, &mp->m_sb.sb_uuid))
- return false;
- return true;
-}
-
-void
-xfs_dinode_calc_crc(
- struct xfs_mount *mp,
- struct xfs_dinode *dip)
-{
- __uint32_t crc;
-
- if (dip->di_version < 3)
- return;
-
- ASSERT(xfs_sb_version_hascrc(&mp->m_sb));
- crc = xfs_start_cksum((char *)dip, mp->m_sb.sb_inodesize,
- offsetof(struct xfs_dinode, di_crc));
- dip->di_crc = xfs_end_cksum(crc);
-}
-
/*
- * Read the disk inode attributes into the in-core inode structure.
+ * Allocate an inode on disk and return a copy of its in-core version.
+ * The in-core inode is locked exclusively. Set mode, nlink, and rdev
+ * appropriately within the inode. The uid and gid for the inode are
+ * set according to the contents of the given cred structure.
+ *
+ * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc()
+ * has a free inode available, call xfs_iget() to obtain the in-core
+ * version of the allocated inode. Finally, fill in the inode and
+ * log its initial contents. In this case, ialloc_context would be
+ * set to NULL.
+ *
+ * If xfs_dialloc() does not have an available inode, it will replenish
+ * its supply by doing an allocation. Since we can only do one
+ * allocation within a transaction without deadlocks, we must commit
+ * the current transaction before returning the inode itself.
+ * In this case, therefore, we will set ialloc_context and return.
+ * The caller should then commit the current transaction, start a new
+ * transaction, and call xfs_ialloc() again to actually get the inode.
+ *
+ * To ensure that some other process does not grab the inode that
+ * was allocated during the first call to xfs_ialloc(), this routine
+ * also returns the [locked] bp pointing to the head of the freelist
+ * as ialloc_context. The caller should hold this buffer across
+ * the commit and pass it back into this routine on the second call.
*
- * If we are initialising a new inode and we are not utilising the
- * XFS_MOUNT_IKEEP inode cluster mode, we can simple build the new inode core
- * with a random generation number. If we are keeping inodes around, we need to
- * read the inode cluster to get the existing generation number off disk.
+ * If we are allocating quota inodes, we do not have a parent inode
+ * to attach to or associate with (i.e. pip == NULL) because they
+ * are not linked into the directory structure - they are attached
+ * directly to the superblock - and so have no parent.
*/
int
-xfs_iread(
- xfs_mount_t *mp,
+xfs_ialloc(
xfs_trans_t *tp,
- xfs_inode_t *ip,
- uint iget_flags)
+ xfs_inode_t *pip,
+ umode_t mode,
+ xfs_nlink_t nlink,
+ xfs_dev_t rdev,
+ prid_t prid,
+ int okalloc,
+ xfs_buf_t **ialloc_context,
+ xfs_inode_t **ipp)
{
- xfs_buf_t *bp;
- xfs_dinode_t *dip;
+ struct xfs_mount *mp = tp->t_mountp;
+ xfs_ino_t ino;
+ xfs_inode_t *ip;
+ uint flags;
int error;
+ timespec_t tv;
+ int filestreams = 0;
/*
- * Fill in the location information in the in-core inode.
+ * Call the space management code to pick
+ * the on-disk inode to be allocated.
*/
- error = xfs_imap(mp, tp, ip->i_ino, &ip->i_imap, iget_flags);
+ error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc,
+ ialloc_context, &ino);
if (error)
return error;
-
- /* shortcut IO on inode allocation if possible */
- if ((iget_flags & XFS_IGET_CREATE) &&
- !(mp->m_flags & XFS_MOUNT_IKEEP)) {
- /* initialise the on-disk inode core */
- memset(&ip->i_d, 0, sizeof(ip->i_d));
- ip->i_d.di_magic = XFS_DINODE_MAGIC;
- ip->i_d.di_gen = prandom_u32();
- if (xfs_sb_version_hascrc(&mp->m_sb)) {
- ip->i_d.di_version = 3;
- ip->i_d.di_ino = ip->i_ino;
- uuid_copy(&ip->i_d.di_uuid, &mp->m_sb.sb_uuid);
- } else
- ip->i_d.di_version = 2;
+ if (*ialloc_context || ino == NULLFSINO) {
+ *ipp = NULL;
return 0;
}
+ ASSERT(*ialloc_context == NULL);
/*
- * Get pointers to the on-disk inode and the buffer containing it.
+ * Get the in-core inode with the lock held exclusively.
+ * This is because we're setting fields here we need
+ * to prevent others from looking at until we're done.
*/
- error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &bp, 0, iget_flags);
+ error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE,
+ XFS_ILOCK_EXCL, &ip);
if (error)
return error;
+ ASSERT(ip != NULL);
- /* even unallocated inodes are verified */
- if (!xfs_dinode_verify(mp, ip, dip)) {
- xfs_alert(mp, "%s: validation failed for inode %lld failed",
- __func__, ip->i_ino);
-
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, dip);
- error = XFS_ERROR(EFSCORRUPTED);
- goto out_brelse;
- }
-
- /*
- * 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 (dip->di_mode) {
- xfs_dinode_from_disk(&ip->i_d, dip);
- error = xfs_iformat(ip, dip);
- if (error) {
-#ifdef DEBUG
- xfs_alert(mp, "%s: xfs_iformat() returned error %d",
- __func__, error);
-#endif /* DEBUG */
- goto out_brelse;
- }
- } else {
- /*
- * Partial initialisation of the in-core inode. Just the bits
- * that xfs_ialloc won't overwrite or relies on being correct.
- */
- ip->i_d.di_magic = be16_to_cpu(dip->di_magic);
- ip->i_d.di_version = dip->di_version;
- ip->i_d.di_gen = be32_to_cpu(dip->di_gen);
- ip->i_d.di_flushiter = be16_to_cpu(dip->di_flushiter);
-
- if (dip->di_version == 3) {
- ip->i_d.di_ino = be64_to_cpu(dip->di_ino);
- uuid_copy(&ip->i_d.di_uuid, &dip->di_uuid);
- }
-
- /*
- * 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;
- }
-
- /*
- * 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 == 1) {
- ip->i_d.di_nlink = ip->i_d.di_onlink;
- ip->i_d.di_onlink = 0;
- xfs_set_projid(ip, 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_imap_to_bp() 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 cache where other
- * processes can find it. Thus we don't have to worry about the inode
- * being changed just because we released the buffer.
- */
- out_brelse:
- xfs_trans_brelse(tp, bp);
- return error;
-}
-
-/*
- * 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;
- xfs_extnum_t nextents;
-
- if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
- XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW,
- ip->i_mount);
- return XFS_ERROR(EFSCORRUPTED);
- }
- nextents = XFS_IFORK_NEXTENTS(ip, whichfork);
- ifp = XFS_IFORK_PTR(ip, whichfork);
-
- /*
- * We know that the size is valid (it's checked in iformat_btree)
- */
- ifp->if_bytes = ifp->if_real_bytes = 0;
- ifp->if_flags |= XFS_IFEXTENTS;
- xfs_iext_add(ifp, 0, nextents);
- error = xfs_bmap_read_extents(tp, ip, whichfork);
- if (error) {
- xfs_iext_destroy(ifp);
- ifp->if_flags &= ~XFS_IFEXTENTS;
- return error;
- }
- xfs_validate_extents(ifp, nextents, XFS_EXTFMT_INODE(ip));
- return 0;
-}
-
-/*
- * Allocate an inode on disk and return a copy of its in-core version.
- * The in-core inode is locked exclusively. Set mode, nlink, and rdev
- * appropriately within the inode. The uid and gid for the inode are
- * set according to the contents of the given cred structure.
- *
- * Use xfs_dialloc() to allocate the on-disk inode. If xfs_dialloc()
- * has a free inode available, call xfs_iget() to obtain the in-core
- * version of the allocated inode. Finally, fill in the inode and
- * log its initial contents. In this case, ialloc_context would be
- * set to NULL.
- *
- * If xfs_dialloc() does not have an available inode, it will replenish
- * its supply by doing an allocation. Since we can only do one
- * allocation within a transaction without deadlocks, we must commit
- * the current transaction before returning the inode itself.
- * In this case, therefore, we will set ialloc_context and return.
- * The caller should then commit the current transaction, start a new
- * transaction, and call xfs_ialloc() again to actually get the inode.
- *
- * To ensure that some other process does not grab the inode that
- * was allocated during the first call to xfs_ialloc(), this routine
- * also returns the [locked] bp pointing to the head of the freelist
- * as ialloc_context. The caller should hold this buffer across
- * the commit and pass it back into this routine on the second call.
- *
- * If we are allocating quota inodes, we do not have a parent inode
- * to attach to or associate with (i.e. pip == NULL) because they
- * are not linked into the directory structure - they are attached
- * directly to the superblock - and so have no parent.
- */
-int
-xfs_ialloc(
- xfs_trans_t *tp,
- xfs_inode_t *pip,
- umode_t mode,
- xfs_nlink_t nlink,
- xfs_dev_t rdev,
- prid_t prid,
- int okalloc,
- xfs_buf_t **ialloc_context,
- xfs_inode_t **ipp)
-{
- struct xfs_mount *mp = tp->t_mountp;
- xfs_ino_t ino;
- xfs_inode_t *ip;
- uint flags;
- int error;
- timespec_t tv;
- int filestreams = 0;
-
- /*
- * Call the space management code to pick
- * the on-disk inode to be allocated.
- */
- error = xfs_dialloc(tp, pip ? pip->i_ino : 0, mode, okalloc,
- ialloc_context, &ino);
- if (error)
- return error;
- if (*ialloc_context || ino == NULLFSINO) {
- *ipp = NULL;
- return 0;
- }
- ASSERT(*ialloc_context == NULL);
-
- /*
- * Get the in-core inode with the lock held exclusively.
- * This is because we're setting fields here we need
- * to prevent others from looking at until we're done.
- */
- error = xfs_iget(mp, tp, ino, XFS_IGET_CREATE,
- XFS_ILOCK_EXCL, &ip);
- if (error)
- return error;
- ASSERT(ip != NULL);
-
- ip->i_d.di_mode = mode;
- ip->i_d.di_onlink = 0;
- ip->i_d.di_nlink = nlink;
- ASSERT(ip->i_d.di_nlink == nlink);
- ip->i_d.di_uid = current_fsuid();
- ip->i_d.di_gid = current_fsgid();
- xfs_set_projid(ip, prid);
- memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
+ ip->i_d.di_mode = mode;
+ ip->i_d.di_onlink = 0;
+ ip->i_d.di_nlink = nlink;
+ ASSERT(ip->i_d.di_nlink == nlink);
+ ip->i_d.di_uid = current_fsuid();
+ ip->i_d.di_gid = current_fsgid();
+ xfs_set_projid(ip, prid);
+ memset(&(ip->i_d.di_pad[0]), 0, sizeof(ip->i_d.di_pad));
/*
* If the superblock version is up to where we support new format
return error;
}
-/*
- * 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)
-{
- struct xfs_mount *mp = ip->i_mount;
- int cur_max;
- xfs_ifork_t *ifp;
- struct xfs_btree_block *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 = XFS_BMAP_BROOT_SPACE_CALC(mp, rec_diff);
- ifp->if_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS);
- 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_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0);
- new_max = cur_max + rec_diff;
- new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max);
- ifp->if_broot = kmem_realloc(ifp->if_broot, new_size,
- XFS_BMAP_BROOT_SPACE_CALC(mp, cur_max),
- KM_SLEEP | KM_NOFS);
- op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1,
- ifp->if_broot_bytes);
- np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1,
- (int)new_size);
- ifp->if_broot_bytes = (int)new_size;
- ASSERT(XFS_BMAP_BMDR_SPACE(ifp->if_broot) <=
- XFS_IFORK_SIZE(ip, whichfork));
- memmove(np, op, 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_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0);
- new_max = cur_max + rec_diff;
- ASSERT(new_max >= 0);
- if (new_max > 0)
- new_size = XFS_BMAP_BROOT_SPACE_CALC(mp, new_max);
- else
- new_size = 0;
- if (new_size > 0) {
- new_broot = kmem_alloc(new_size, KM_SLEEP | KM_NOFS);
- /*
- * First copy over the btree block header.
- */
- memcpy(new_broot, ifp->if_broot,
- XFS_BMBT_BLOCK_LEN(ip->i_mount));
- } 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_BMBT_REC_ADDR(mp, ifp->if_broot, 1);
- np = (char *)XFS_BMBT_REC_ADDR(mp, new_broot, 1);
- memcpy(np, op, new_max * (uint)sizeof(xfs_bmbt_rec_t));
-
- /*
- * Then copy the pointers.
- */
- op = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, ifp->if_broot, 1,
- ifp->if_broot_bytes);
- np = (char *)XFS_BMAP_BROOT_PTR_ADDR(mp, new_broot, 1,
- (int)new_size);
- memcpy(np, op, new_max * (uint)sizeof(xfs_dfsbno_t));
- }
- kmem_free(ifp->if_broot);
- ifp->if_broot = new_broot;
- ifp->if_broot_bytes = (int)new_size;
- if (ifp->if_broot)
- ASSERT(XFS_BMAP_BMDR_SPACE(ifp->if_broot) <=
- XFS_IFORK_SIZE(ip, whichfork));
- return;
-}
-
-
-/*
- * 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_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);
- memcpy(ifp->if_u2.if_inline_data, ifp->if_u1.if_data,
- new_size);
- kmem_free(ifp->if_u1.if_data);
- 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 | KM_NOFS);
- } 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 | KM_NOFS);
- }
- } else {
- ASSERT(ifp->if_real_bytes == 0);
- ifp->if_u1.if_data = kmem_alloc(real_size,
- KM_SLEEP | KM_NOFS);
- memcpy(ifp->if_u1.if_data, ifp->if_u2.if_inline_data,
- ifp->if_bytes);
- }
- }
- ifp->if_real_bytes = real_size;
- ifp->if_bytes = new_size;
- ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork));
-}
-
-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 = 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_u1.if_data = NULL;
- ifp->if_real_bytes = 0;
- }
- } else if ((ifp->if_flags & XFS_IFEXTENTS) &&
- ((ifp->if_flags & XFS_IFEXTIREC) ||
- ((ifp->if_u1.if_extents != NULL) &&
- (ifp->if_u1.if_extents != ifp->if_u2.if_inline_ext)))) {
- ASSERT(ifp->if_real_bytes != 0);
- xfs_iext_destroy(ifp);
- }
- 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;
- }
-}
-
/*
* This is called to unpin an inode. The caller must have the inode locked
* in at least shared mode so that the buffer cannot be subsequently pinned
__xfs_iunpin_wait(ip);
}
-/*
- * 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
- * memcpy() 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_t *dp,
- int whichfork)
+STATIC int
+xfs_iflush_cluster(
+ xfs_inode_t *ip,
+ xfs_buf_t *bp)
{
- int copied;
+ xfs_mount_t *mp = ip->i_mount;
+ struct xfs_perag *pag;
+ unsigned long first_index, mask;
+ unsigned long inodes_per_cluster;
+ int ilist_size;
+ xfs_inode_t **ilist;
+ xfs_inode_t *iq;
+ int nr_found;
+ int clcount = 0;
+ int bufwasdelwri;
int i;
- xfs_ifork_t *ifp;
- int nrecs;
- xfs_fsblock_t start_block;
- ifp = XFS_IFORK_PTR(ip, whichfork);
- ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
- ASSERT(ifp->if_bytes > 0);
-
- nrecs = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- XFS_BMAP_TRACE_EXLIST(ip, nrecs, whichfork);
- ASSERT(nrecs > 0);
+ pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
- /*
- * 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.
- */
- copied = 0;
- for (i = 0; i < nrecs; i++) {
- xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, i);
- start_block = xfs_bmbt_get_startblock(ep);
- if (isnullstartblock(start_block)) {
- /*
- * It's a delayed allocation extent, so skip it.
- */
- continue;
- }
+ inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog;
+ ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
+ ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS);
+ if (!ilist)
+ goto out_put;
- /* Translate to on disk format */
- put_unaligned(cpu_to_be64(ep->l0), &dp->l0);
- put_unaligned(cpu_to_be64(ep->l1), &dp->l1);
- dp++;
- copied++;
- }
- ASSERT(copied != 0);
- xfs_validate_extents(ifp, copied, XFS_EXTFMT_INODE(ip));
+ mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
+ first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
+ rcu_read_lock();
+ /* really need a gang lookup range call here */
+ nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist,
+ first_index, inodes_per_cluster);
+ if (nr_found == 0)
+ goto out_free;
- 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.
- */
-/*ARGSUSED*/
-STATIC void
-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;
- 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)
- return;
- 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) {
- ASSERT(whichfork == XFS_ATTR_FORK);
- return;
- }
- cp = XFS_DFORK_PTR(dip, whichfork);
- mp = ip->i_mount;
- switch (XFS_IFORK_FORMAT(ip, whichfork)) {
- case XFS_DINODE_FMT_LOCAL:
- if ((iip->ili_fields & dataflag[whichfork]) &&
- (ifp->if_bytes > 0)) {
- ASSERT(ifp->if_u1.if_data != NULL);
- ASSERT(ifp->if_bytes <= XFS_IFORK_SIZE(ip, whichfork));
- memcpy(cp, ifp->if_u1.if_data, ifp->if_bytes);
- }
- break;
-
- case XFS_DINODE_FMT_EXTENTS:
- ASSERT((ifp->if_flags & XFS_IFEXTENTS) ||
- !(iip->ili_fields & extflag[whichfork]));
- if ((iip->ili_fields & extflag[whichfork]) &&
- (ifp->if_bytes > 0)) {
- ASSERT(xfs_iext_get_ext(ifp, 0));
- ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0);
- (void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp,
- whichfork);
- }
- break;
-
- case XFS_DINODE_FMT_BTREE:
- if ((iip->ili_fields & brootflag[whichfork]) &&
- (ifp->if_broot_bytes > 0)) {
- ASSERT(ifp->if_broot != NULL);
- ASSERT(XFS_BMAP_BMDR_SPACE(ifp->if_broot) <=
- XFS_IFORK_SIZE(ip, whichfork));
- xfs_bmbt_to_bmdr(mp, ifp->if_broot, ifp->if_broot_bytes,
- (xfs_bmdr_block_t *)cp,
- XFS_DFORK_SIZE(dip, mp, whichfork));
- }
- break;
-
- case XFS_DINODE_FMT_DEV:
- if (iip->ili_fields & XFS_ILOG_DEV) {
- ASSERT(whichfork == XFS_DATA_FORK);
- xfs_dinode_put_rdev(dip, ip->i_df.if_u2.if_rdev);
- }
- break;
-
- case XFS_DINODE_FMT_UUID:
- if (iip->ili_fields & XFS_ILOG_UUID) {
- ASSERT(whichfork == XFS_DATA_FORK);
- memcpy(XFS_DFORK_DPTR(dip),
- &ip->i_df.if_u2.if_uuid,
- sizeof(uuid_t));
- }
- break;
-
- default:
- ASSERT(0);
- break;
- }
-}
-
-STATIC int
-xfs_iflush_cluster(
- xfs_inode_t *ip,
- xfs_buf_t *bp)
-{
- xfs_mount_t *mp = ip->i_mount;
- struct xfs_perag *pag;
- unsigned long first_index, mask;
- unsigned long inodes_per_cluster;
- int ilist_size;
- xfs_inode_t **ilist;
- xfs_inode_t *iq;
- int nr_found;
- int clcount = 0;
- int bufwasdelwri;
- int i;
-
- pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
-
- inodes_per_cluster = XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog;
- ilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
- ilist = kmem_alloc(ilist_size, KM_MAYFAIL|KM_NOFS);
- if (!ilist)
- goto out_put;
-
- mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1);
- first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
- rcu_read_lock();
- /* really need a gang lookup range call here */
- nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist,
- first_index, inodes_per_cluster);
- if (nr_found == 0)
- goto out_free;
-
- for (i = 0; i < nr_found; i++) {
- iq = ilist[i];
- if (iq == ip)
- continue;
+ for (i = 0; i < nr_found; i++) {
+ iq = ilist[i];
+ if (iq == ip)
+ continue;
/*
* because this is an RCU protected lookup, we could find a
__func__, ip->i_ino, ip->i_d.di_forkoff, ip);
goto corrupt_out;
}
+
/*
- * bump the flush iteration count, used to detect flushes which
- * postdate a log record during recovery. This is redundant as we now
- * log every change and hence this can't happen. Still, it doesn't hurt.
+ * Inode item log recovery for v1/v2 inodes are dependent on the
+ * di_flushiter count for correct sequencing. We bump the flush
+ * iteration count so we can detect flushes which postdate a log record
+ * during recovery. This is redundant as we now log every change and
+ * hence this can't happen but we need to still do it to ensure
+ * backwards compatibility with old kernels that predate logging all
+ * inode changes.
*/
- ip->i_d.di_flushiter++;
+ if (ip->i_d.di_version < 3)
+ ip->i_d.di_flushiter++;
/*
* Copy the dirty parts of the inode into the on-disk
return XFS_ERROR(EFSCORRUPTED);
}
-/*
- * Return a pointer to the extent record at file index idx.
- */
-xfs_bmbt_rec_host_t *
-xfs_iext_get_ext(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t idx) /* index of target extent */
-{
- ASSERT(idx >= 0);
- ASSERT(idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t));
-
- if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) {
- return ifp->if_u1.if_ext_irec->er_extbuf;
- } else if (ifp->if_flags & XFS_IFEXTIREC) {
- xfs_ext_irec_t *erp; /* irec pointer */
- int erp_idx = 0; /* irec index */
- xfs_extnum_t page_idx = idx; /* ext index in target list */
-
- erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0);
- return &erp->er_extbuf[page_idx];
- } else if (ifp->if_bytes) {
- return &ifp->if_u1.if_extents[idx];
- } else {
- return NULL;
- }
-}
-
-/*
- * Insert new item(s) into the extent records for incore inode
- * fork 'ifp'. 'count' new items are inserted at index 'idx'.
- */
-void
-xfs_iext_insert(
- xfs_inode_t *ip, /* incore inode pointer */
- xfs_extnum_t idx, /* starting index of new items */
- xfs_extnum_t count, /* number of inserted items */
- xfs_bmbt_irec_t *new, /* items to insert */
- int state) /* type of extent conversion */
-{
- xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df;
- xfs_extnum_t i; /* extent record index */
-
- trace_xfs_iext_insert(ip, idx, new, state, _RET_IP_);
-
- ASSERT(ifp->if_flags & XFS_IFEXTENTS);
- xfs_iext_add(ifp, idx, count);
- for (i = idx; i < idx + count; i++, new++)
- xfs_bmbt_set_all(xfs_iext_get_ext(ifp, i), new);
-}
-
-/*
- * This is called when the amount of space required for incore file
- * extents needs to be increased. The ext_diff parameter stores the
- * number of new extents being added and the idx parameter contains
- * the extent index where the new extents will be added. If the new
- * extents are being appended, then we just need to (re)allocate and
- * initialize the space. Otherwise, if the new extents are being
- * inserted into the middle of the existing entries, a bit more work
- * is required to make room for the new extents to be inserted. The
- * caller is responsible for filling in the new extent entries upon
- * return.
- */
-void
-xfs_iext_add(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t idx, /* index to begin adding exts */
- int ext_diff) /* number of extents to add */
-{
- int byte_diff; /* new bytes being added */
- int new_size; /* size of extents after adding */
- xfs_extnum_t nextents; /* number of extents in file */
-
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- ASSERT((idx >= 0) && (idx <= nextents));
- byte_diff = ext_diff * sizeof(xfs_bmbt_rec_t);
- new_size = ifp->if_bytes + byte_diff;
- /*
- * If the new number of extents (nextents + ext_diff)
- * fits inside the inode, then continue to use the inline
- * extent buffer.
- */
- if (nextents + ext_diff <= XFS_INLINE_EXTS) {
- if (idx < nextents) {
- memmove(&ifp->if_u2.if_inline_ext[idx + ext_diff],
- &ifp->if_u2.if_inline_ext[idx],
- (nextents - idx) * sizeof(xfs_bmbt_rec_t));
- memset(&ifp->if_u2.if_inline_ext[idx], 0, byte_diff);
- }
- ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
- ifp->if_real_bytes = 0;
- }
- /*
- * Otherwise use a linear (direct) extent list.
- * If the extents are currently inside the inode,
- * xfs_iext_realloc_direct will switch us from
- * inline to direct extent allocation mode.
- */
- else if (nextents + ext_diff <= XFS_LINEAR_EXTS) {
- xfs_iext_realloc_direct(ifp, new_size);
- if (idx < nextents) {
- memmove(&ifp->if_u1.if_extents[idx + ext_diff],
- &ifp->if_u1.if_extents[idx],
- (nextents - idx) * sizeof(xfs_bmbt_rec_t));
- memset(&ifp->if_u1.if_extents[idx], 0, byte_diff);
- }
- }
- /* Indirection array */
- else {
- xfs_ext_irec_t *erp;
- int erp_idx = 0;
- int page_idx = idx;
-
- ASSERT(nextents + ext_diff > XFS_LINEAR_EXTS);
- if (ifp->if_flags & XFS_IFEXTIREC) {
- erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 1);
- } else {
- xfs_iext_irec_init(ifp);
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- erp = ifp->if_u1.if_ext_irec;
- }
- /* Extents fit in target extent page */
- if (erp && erp->er_extcount + ext_diff <= XFS_LINEAR_EXTS) {
- if (page_idx < erp->er_extcount) {
- memmove(&erp->er_extbuf[page_idx + ext_diff],
- &erp->er_extbuf[page_idx],
- (erp->er_extcount - page_idx) *
- sizeof(xfs_bmbt_rec_t));
- memset(&erp->er_extbuf[page_idx], 0, byte_diff);
- }
- erp->er_extcount += ext_diff;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff);
- }
- /* Insert a new extent page */
- else if (erp) {
- xfs_iext_add_indirect_multi(ifp,
- erp_idx, page_idx, ext_diff);
- }
- /*
- * If extent(s) are being appended to the last page in
- * the indirection array and the new extent(s) don't fit
- * in the page, then erp is NULL and erp_idx is set to
- * the next index needed in the indirection array.
- */
- else {
- int count = ext_diff;
-
- while (count) {
- erp = xfs_iext_irec_new(ifp, erp_idx);
- erp->er_extcount = count;
- count -= MIN(count, (int)XFS_LINEAR_EXTS);
- if (count) {
- erp_idx++;
- }
- }
- }
- }
- ifp->if_bytes = new_size;
-}
-
-/*
- * This is called when incore extents are being added to the indirection
- * array and the new extents do not fit in the target extent list. The
- * erp_idx parameter contains the irec index for the target extent list
- * in the indirection array, and the idx parameter contains the extent
- * index within the list. The number of extents being added is stored
- * in the count parameter.
- *
- * |-------| |-------|
- * | | | | idx - number of extents before idx
- * | idx | | count |
- * | | | | count - number of extents being inserted at idx
- * |-------| |-------|
- * | count | | nex2 | nex2 - number of extents after idx + count
- * |-------| |-------|
- */
-void
-xfs_iext_add_indirect_multi(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int erp_idx, /* target extent irec index */
- xfs_extnum_t idx, /* index within target list */
- int count) /* new extents being added */
-{
- int byte_diff; /* new bytes being added */
- xfs_ext_irec_t *erp; /* pointer to irec entry */
- xfs_extnum_t ext_diff; /* number of extents to add */
- xfs_extnum_t ext_cnt; /* new extents still needed */
- xfs_extnum_t nex2; /* extents after idx + count */
- xfs_bmbt_rec_t *nex2_ep = NULL; /* temp list for nex2 extents */
- int nlists; /* number of irec's (lists) */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- nex2 = erp->er_extcount - idx;
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
-
- /*
- * Save second part of target extent list
- * (all extents past */
- if (nex2) {
- byte_diff = nex2 * sizeof(xfs_bmbt_rec_t);
- nex2_ep = (xfs_bmbt_rec_t *) kmem_alloc(byte_diff, KM_NOFS);
- memmove(nex2_ep, &erp->er_extbuf[idx], byte_diff);
- erp->er_extcount -= nex2;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -nex2);
- memset(&erp->er_extbuf[idx], 0, byte_diff);
- }
-
- /*
- * Add the new extents to the end of the target
- * list, then allocate new irec record(s) and
- * extent buffer(s) as needed to store the rest
- * of the new extents.
- */
- ext_cnt = count;
- ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS - erp->er_extcount);
- if (ext_diff) {
- erp->er_extcount += ext_diff;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff);
- ext_cnt -= ext_diff;
- }
- while (ext_cnt) {
- erp_idx++;
- erp = xfs_iext_irec_new(ifp, erp_idx);
- ext_diff = MIN(ext_cnt, (int)XFS_LINEAR_EXTS);
- erp->er_extcount = ext_diff;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, ext_diff);
- ext_cnt -= ext_diff;
- }
-
- /* Add nex2 extents back to indirection array */
- if (nex2) {
- xfs_extnum_t ext_avail;
- int i;
-
- byte_diff = nex2 * sizeof(xfs_bmbt_rec_t);
- ext_avail = XFS_LINEAR_EXTS - erp->er_extcount;
- i = 0;
- /*
- * If nex2 extents fit in the current page, append
- * nex2_ep after the new extents.
- */
- if (nex2 <= ext_avail) {
- i = erp->er_extcount;
- }
- /*
- * Otherwise, check if space is available in the
- * next page.
- */
- else if ((erp_idx < nlists - 1) &&
- (nex2 <= (ext_avail = XFS_LINEAR_EXTS -
- ifp->if_u1.if_ext_irec[erp_idx+1].er_extcount))) {
- erp_idx++;
- erp++;
- /* Create a hole for nex2 extents */
- memmove(&erp->er_extbuf[nex2], erp->er_extbuf,
- erp->er_extcount * sizeof(xfs_bmbt_rec_t));
- }
- /*
- * Final choice, create a new extent page for
- * nex2 extents.
- */
- else {
- erp_idx++;
- erp = xfs_iext_irec_new(ifp, erp_idx);
- }
- memmove(&erp->er_extbuf[i], nex2_ep, byte_diff);
- kmem_free(nex2_ep);
- erp->er_extcount += nex2;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, nex2);
- }
-}
-
-/*
- * This is called when the amount of space required for incore file
- * extents needs to be decreased. The ext_diff parameter stores the
- * number of extents to be removed and the idx parameter contains
- * the extent index where the extents will be removed from.
- *
- * If the amount of space needed has decreased below the linear
- * limit, XFS_IEXT_BUFSZ, then switch to using the contiguous
- * extent array. Otherwise, use kmem_realloc() to adjust the
- * size to what is needed.
- */
-void
-xfs_iext_remove(
- xfs_inode_t *ip, /* incore inode pointer */
- xfs_extnum_t idx, /* index to begin removing exts */
- int ext_diff, /* number of extents to remove */
- int state) /* type of extent conversion */
-{
- xfs_ifork_t *ifp = (state & BMAP_ATTRFORK) ? ip->i_afp : &ip->i_df;
- xfs_extnum_t nextents; /* number of extents in file */
- int new_size; /* size of extents after removal */
-
- trace_xfs_iext_remove(ip, idx, state, _RET_IP_);
-
- ASSERT(ext_diff > 0);
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- new_size = (nextents - ext_diff) * sizeof(xfs_bmbt_rec_t);
-
- if (new_size == 0) {
- xfs_iext_destroy(ifp);
- } else if (ifp->if_flags & XFS_IFEXTIREC) {
- xfs_iext_remove_indirect(ifp, idx, ext_diff);
- } else if (ifp->if_real_bytes) {
- xfs_iext_remove_direct(ifp, idx, ext_diff);
- } else {
- xfs_iext_remove_inline(ifp, idx, ext_diff);
- }
- ifp->if_bytes = new_size;
-}
-
-/*
- * This removes ext_diff extents from the inline buffer, beginning
- * at extent index idx.
- */
-void
-xfs_iext_remove_inline(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t idx, /* index to begin removing exts */
- int ext_diff) /* number of extents to remove */
-{
- int nextents; /* number of extents in file */
-
- ASSERT(!(ifp->if_flags & XFS_IFEXTIREC));
- ASSERT(idx < XFS_INLINE_EXTS);
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- ASSERT(((nextents - ext_diff) > 0) &&
- (nextents - ext_diff) < XFS_INLINE_EXTS);
-
- if (idx + ext_diff < nextents) {
- memmove(&ifp->if_u2.if_inline_ext[idx],
- &ifp->if_u2.if_inline_ext[idx + ext_diff],
- (nextents - (idx + ext_diff)) *
- sizeof(xfs_bmbt_rec_t));
- memset(&ifp->if_u2.if_inline_ext[nextents - ext_diff],
- 0, ext_diff * sizeof(xfs_bmbt_rec_t));
- } else {
- memset(&ifp->if_u2.if_inline_ext[idx], 0,
- ext_diff * sizeof(xfs_bmbt_rec_t));
- }
-}
-
-/*
- * This removes ext_diff extents from a linear (direct) extent list,
- * beginning at extent index idx. If the extents are being removed
- * from the end of the list (ie. truncate) then we just need to re-
- * allocate the list to remove the extra space. Otherwise, if the
- * extents are being removed from the middle of the existing extent
- * entries, then we first need to move the extent records beginning
- * at idx + ext_diff up in the list to overwrite the records being
- * removed, then remove the extra space via kmem_realloc.
- */
-void
-xfs_iext_remove_direct(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t idx, /* index to begin removing exts */
- int ext_diff) /* number of extents to remove */
-{
- xfs_extnum_t nextents; /* number of extents in file */
- int new_size; /* size of extents after removal */
-
- ASSERT(!(ifp->if_flags & XFS_IFEXTIREC));
- new_size = ifp->if_bytes -
- (ext_diff * sizeof(xfs_bmbt_rec_t));
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
-
- if (new_size == 0) {
- xfs_iext_destroy(ifp);
- return;
- }
- /* Move extents up in the list (if needed) */
- if (idx + ext_diff < nextents) {
- memmove(&ifp->if_u1.if_extents[idx],
- &ifp->if_u1.if_extents[idx + ext_diff],
- (nextents - (idx + ext_diff)) *
- sizeof(xfs_bmbt_rec_t));
- }
- memset(&ifp->if_u1.if_extents[nextents - ext_diff],
- 0, ext_diff * sizeof(xfs_bmbt_rec_t));
- /*
- * Reallocate the direct extent list. If the extents
- * will fit inside the inode then xfs_iext_realloc_direct
- * will switch from direct to inline extent allocation
- * mode for us.
- */
- xfs_iext_realloc_direct(ifp, new_size);
- ifp->if_bytes = new_size;
-}
-
-/*
- * This is called when incore extents are being removed from the
- * indirection array and the extents being removed span multiple extent
- * buffers. The idx parameter contains the file extent index where we
- * want to begin removing extents, and the count parameter contains
- * how many extents need to be removed.
- *
- * |-------| |-------|
- * | nex1 | | | nex1 - number of extents before idx
- * |-------| | count |
- * | | | | count - number of extents being removed at idx
- * | count | |-------|
- * | | | nex2 | nex2 - number of extents after idx + count
- * |-------| |-------|
- */
-void
-xfs_iext_remove_indirect(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t idx, /* index to begin removing extents */
- int count) /* number of extents to remove */
-{
- xfs_ext_irec_t *erp; /* indirection array pointer */
- int erp_idx = 0; /* indirection array index */
- xfs_extnum_t ext_cnt; /* extents left to remove */
- xfs_extnum_t ext_diff; /* extents to remove in current list */
- xfs_extnum_t nex1; /* number of extents before idx */
- xfs_extnum_t nex2; /* extents after idx + count */
- int page_idx = idx; /* index in target extent list */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- erp = xfs_iext_idx_to_irec(ifp, &page_idx, &erp_idx, 0);
- ASSERT(erp != NULL);
- nex1 = page_idx;
- ext_cnt = count;
- while (ext_cnt) {
- nex2 = MAX((erp->er_extcount - (nex1 + ext_cnt)), 0);
- ext_diff = MIN(ext_cnt, (erp->er_extcount - nex1));
- /*
- * Check for deletion of entire list;
- * xfs_iext_irec_remove() updates extent offsets.
- */
- if (ext_diff == erp->er_extcount) {
- xfs_iext_irec_remove(ifp, erp_idx);
- ext_cnt -= ext_diff;
- nex1 = 0;
- if (ext_cnt) {
- ASSERT(erp_idx < ifp->if_real_bytes /
- XFS_IEXT_BUFSZ);
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- nex1 = 0;
- continue;
- } else {
- break;
- }
- }
- /* Move extents up (if needed) */
- if (nex2) {
- memmove(&erp->er_extbuf[nex1],
- &erp->er_extbuf[nex1 + ext_diff],
- nex2 * sizeof(xfs_bmbt_rec_t));
- }
- /* Zero out rest of page */
- memset(&erp->er_extbuf[nex1 + nex2], 0, (XFS_IEXT_BUFSZ -
- ((nex1 + nex2) * sizeof(xfs_bmbt_rec_t))));
- /* Update remaining counters */
- erp->er_extcount -= ext_diff;
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1, -ext_diff);
- ext_cnt -= ext_diff;
- nex1 = 0;
- erp_idx++;
- erp++;
- }
- ifp->if_bytes -= count * sizeof(xfs_bmbt_rec_t);
- xfs_iext_irec_compact(ifp);
-}
-
-/*
- * Create, destroy, or resize a linear (direct) block of extents.
- */
-void
-xfs_iext_realloc_direct(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int new_size) /* new size of extents */
-{
- int rnew_size; /* real new size of extents */
-
- rnew_size = new_size;
-
- ASSERT(!(ifp->if_flags & XFS_IFEXTIREC) ||
- ((new_size >= 0) && (new_size <= XFS_IEXT_BUFSZ) &&
- (new_size != ifp->if_real_bytes)));
-
- /* Free extent records */
- if (new_size == 0) {
- xfs_iext_destroy(ifp);
- }
- /* Resize direct extent list and zero any new bytes */
- else if (ifp->if_real_bytes) {
- /* Check if extents will fit inside the inode */
- if (new_size <= XFS_INLINE_EXTS * sizeof(xfs_bmbt_rec_t)) {
- xfs_iext_direct_to_inline(ifp, new_size /
- (uint)sizeof(xfs_bmbt_rec_t));
- ifp->if_bytes = new_size;
- return;
- }
- if (!is_power_of_2(new_size)){
- rnew_size = roundup_pow_of_two(new_size);
- }
- if (rnew_size != ifp->if_real_bytes) {
- ifp->if_u1.if_extents =
- kmem_realloc(ifp->if_u1.if_extents,
- rnew_size,
- ifp->if_real_bytes, KM_NOFS);
- }
- if (rnew_size > ifp->if_real_bytes) {
- memset(&ifp->if_u1.if_extents[ifp->if_bytes /
- (uint)sizeof(xfs_bmbt_rec_t)], 0,
- rnew_size - ifp->if_real_bytes);
- }
- }
- /*
- * Switch from the inline extent buffer to a direct
- * extent list. Be sure to include the inline extent
- * bytes in new_size.
- */
- else {
- new_size += ifp->if_bytes;
- if (!is_power_of_2(new_size)) {
- rnew_size = roundup_pow_of_two(new_size);
- }
- xfs_iext_inline_to_direct(ifp, rnew_size);
- }
- ifp->if_real_bytes = rnew_size;
- ifp->if_bytes = new_size;
-}
-
-/*
- * Switch from linear (direct) extent records to inline buffer.
- */
-void
-xfs_iext_direct_to_inline(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t nextents) /* number of extents in file */
-{
- ASSERT(ifp->if_flags & XFS_IFEXTENTS);
- ASSERT(nextents <= XFS_INLINE_EXTS);
- /*
- * The inline buffer was zeroed when we switched
- * from inline to direct extent allocation mode,
- * so we don't need to clear it here.
- */
- memcpy(ifp->if_u2.if_inline_ext, ifp->if_u1.if_extents,
- nextents * sizeof(xfs_bmbt_rec_t));
- kmem_free(ifp->if_u1.if_extents);
- ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
- ifp->if_real_bytes = 0;
-}
-
-/*
- * Switch from inline buffer to linear (direct) extent records.
- * new_size should already be rounded up to the next power of 2
- * by the caller (when appropriate), so use new_size as it is.
- * However, since new_size may be rounded up, we can't update
- * if_bytes here. It is the caller's responsibility to update
- * if_bytes upon return.
- */
-void
-xfs_iext_inline_to_direct(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int new_size) /* number of extents in file */
-{
- ifp->if_u1.if_extents = kmem_alloc(new_size, KM_NOFS);
- memset(ifp->if_u1.if_extents, 0, new_size);
- if (ifp->if_bytes) {
- memcpy(ifp->if_u1.if_extents, ifp->if_u2.if_inline_ext,
- ifp->if_bytes);
- memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS *
- sizeof(xfs_bmbt_rec_t));
- }
- ifp->if_real_bytes = new_size;
-}
-
-/*
- * Resize an extent indirection array to new_size bytes.
- */
-STATIC void
-xfs_iext_realloc_indirect(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int new_size) /* new indirection array size */
-{
- int nlists; /* number of irec's (ex lists) */
- int size; /* current indirection array size */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- size = nlists * sizeof(xfs_ext_irec_t);
- ASSERT(ifp->if_real_bytes);
- ASSERT((new_size >= 0) && (new_size != size));
- if (new_size == 0) {
- xfs_iext_destroy(ifp);
- } else {
- ifp->if_u1.if_ext_irec = (xfs_ext_irec_t *)
- kmem_realloc(ifp->if_u1.if_ext_irec,
- new_size, size, KM_NOFS);
- }
-}
-
-/*
- * Switch from indirection array to linear (direct) extent allocations.
- */
-STATIC void
-xfs_iext_indirect_to_direct(
- xfs_ifork_t *ifp) /* inode fork pointer */
-{
- xfs_bmbt_rec_host_t *ep; /* extent record pointer */
- xfs_extnum_t nextents; /* number of extents in file */
- int size; /* size of file extents */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- ASSERT(nextents <= XFS_LINEAR_EXTS);
- size = nextents * sizeof(xfs_bmbt_rec_t);
-
- xfs_iext_irec_compact_pages(ifp);
- ASSERT(ifp->if_real_bytes == XFS_IEXT_BUFSZ);
-
- ep = ifp->if_u1.if_ext_irec->er_extbuf;
- kmem_free(ifp->if_u1.if_ext_irec);
- ifp->if_flags &= ~XFS_IFEXTIREC;
- ifp->if_u1.if_extents = ep;
- ifp->if_bytes = size;
- if (nextents < XFS_LINEAR_EXTS) {
- xfs_iext_realloc_direct(ifp, size);
- }
-}
-
-/*
- * Free incore file extents.
- */
-void
-xfs_iext_destroy(
- xfs_ifork_t *ifp) /* inode fork pointer */
-{
- if (ifp->if_flags & XFS_IFEXTIREC) {
- int erp_idx;
- int nlists;
-
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- for (erp_idx = nlists - 1; erp_idx >= 0 ; erp_idx--) {
- xfs_iext_irec_remove(ifp, erp_idx);
- }
- ifp->if_flags &= ~XFS_IFEXTIREC;
- } else if (ifp->if_real_bytes) {
- kmem_free(ifp->if_u1.if_extents);
- } else if (ifp->if_bytes) {
- memset(ifp->if_u2.if_inline_ext, 0, XFS_INLINE_EXTS *
- sizeof(xfs_bmbt_rec_t));
- }
- ifp->if_u1.if_extents = NULL;
- ifp->if_real_bytes = 0;
- ifp->if_bytes = 0;
-}
-
-/*
- * Return a pointer to the extent record for file system block bno.
- */
-xfs_bmbt_rec_host_t * /* pointer to found extent record */
-xfs_iext_bno_to_ext(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_fileoff_t bno, /* block number to search for */
- xfs_extnum_t *idxp) /* index of target extent */
-{
- xfs_bmbt_rec_host_t *base; /* pointer to first extent */
- xfs_filblks_t blockcount = 0; /* number of blocks in extent */
- xfs_bmbt_rec_host_t *ep = NULL; /* pointer to target extent */
- xfs_ext_irec_t *erp = NULL; /* indirection array pointer */
- int high; /* upper boundary in search */
- xfs_extnum_t idx = 0; /* index of target extent */
- int low; /* lower boundary in search */
- xfs_extnum_t nextents; /* number of file extents */
- xfs_fileoff_t startoff = 0; /* start offset of extent */
-
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- if (nextents == 0) {
- *idxp = 0;
- return NULL;
- }
- low = 0;
- if (ifp->if_flags & XFS_IFEXTIREC) {
- /* Find target extent list */
- int erp_idx = 0;
- erp = xfs_iext_bno_to_irec(ifp, bno, &erp_idx);
- base = erp->er_extbuf;
- high = erp->er_extcount - 1;
- } else {
- base = ifp->if_u1.if_extents;
- high = nextents - 1;
- }
- /* Binary search extent records */
- while (low <= high) {
- idx = (low + high) >> 1;
- ep = base + idx;
- startoff = xfs_bmbt_get_startoff(ep);
- blockcount = xfs_bmbt_get_blockcount(ep);
- if (bno < startoff) {
- high = idx - 1;
- } else if (bno >= startoff + blockcount) {
- low = idx + 1;
- } else {
- /* Convert back to file-based extent index */
- if (ifp->if_flags & XFS_IFEXTIREC) {
- idx += erp->er_extoff;
- }
- *idxp = idx;
- return ep;
- }
- }
- /* Convert back to file-based extent index */
- if (ifp->if_flags & XFS_IFEXTIREC) {
- idx += erp->er_extoff;
- }
- if (bno >= startoff + blockcount) {
- if (++idx == nextents) {
- ep = NULL;
- } else {
- ep = xfs_iext_get_ext(ifp, idx);
- }
- }
- *idxp = idx;
- return ep;
-}
-
-/*
- * Return a pointer to the indirection array entry containing the
- * extent record for filesystem block bno. Store the index of the
- * target irec in *erp_idxp.
- */
-xfs_ext_irec_t * /* pointer to found extent record */
-xfs_iext_bno_to_irec(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_fileoff_t bno, /* block number to search for */
- int *erp_idxp) /* irec index of target ext list */
-{
- xfs_ext_irec_t *erp = NULL; /* indirection array pointer */
- xfs_ext_irec_t *erp_next; /* next indirection array entry */
- int erp_idx; /* indirection array index */
- int nlists; /* number of extent irec's (lists) */
- int high; /* binary search upper limit */
- int low; /* binary search lower limit */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- erp_idx = 0;
- low = 0;
- high = nlists - 1;
- while (low <= high) {
- erp_idx = (low + high) >> 1;
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- erp_next = erp_idx < nlists - 1 ? erp + 1 : NULL;
- if (bno < xfs_bmbt_get_startoff(erp->er_extbuf)) {
- high = erp_idx - 1;
- } else if (erp_next && bno >=
- xfs_bmbt_get_startoff(erp_next->er_extbuf)) {
- low = erp_idx + 1;
- } else {
- break;
- }
- }
- *erp_idxp = erp_idx;
- return erp;
-}
-
-/*
- * Return a pointer to the indirection array entry containing the
- * extent record at file extent index *idxp. Store the index of the
- * target irec in *erp_idxp and store the page index of the target
- * extent record in *idxp.
- */
-xfs_ext_irec_t *
-xfs_iext_idx_to_irec(
- xfs_ifork_t *ifp, /* inode fork pointer */
- xfs_extnum_t *idxp, /* extent index (file -> page) */
- int *erp_idxp, /* pointer to target irec */
- int realloc) /* new bytes were just added */
-{
- xfs_ext_irec_t *prev; /* pointer to previous irec */
- xfs_ext_irec_t *erp = NULL; /* pointer to current irec */
- int erp_idx; /* indirection array index */
- int nlists; /* number of irec's (ex lists) */
- int high; /* binary search upper limit */
- int low; /* binary search lower limit */
- xfs_extnum_t page_idx = *idxp; /* extent index in target list */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- ASSERT(page_idx >= 0);
- ASSERT(page_idx <= ifp->if_bytes / sizeof(xfs_bmbt_rec_t));
- ASSERT(page_idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t) || realloc);
-
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- erp_idx = 0;
- low = 0;
- high = nlists - 1;
-
- /* Binary search extent irec's */
- while (low <= high) {
- erp_idx = (low + high) >> 1;
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- prev = erp_idx > 0 ? erp - 1 : NULL;
- if (page_idx < erp->er_extoff || (page_idx == erp->er_extoff &&
- realloc && prev && prev->er_extcount < XFS_LINEAR_EXTS)) {
- high = erp_idx - 1;
- } else if (page_idx > erp->er_extoff + erp->er_extcount ||
- (page_idx == erp->er_extoff + erp->er_extcount &&
- !realloc)) {
- low = erp_idx + 1;
- } else if (page_idx == erp->er_extoff + erp->er_extcount &&
- erp->er_extcount == XFS_LINEAR_EXTS) {
- ASSERT(realloc);
- page_idx = 0;
- erp_idx++;
- erp = erp_idx < nlists ? erp + 1 : NULL;
- break;
- } else {
- page_idx -= erp->er_extoff;
- break;
- }
- }
- *idxp = page_idx;
- *erp_idxp = erp_idx;
- return(erp);
-}
-
-/*
- * Allocate and initialize an indirection array once the space needed
- * for incore extents increases above XFS_IEXT_BUFSZ.
- */
-void
-xfs_iext_irec_init(
- xfs_ifork_t *ifp) /* inode fork pointer */
-{
- xfs_ext_irec_t *erp; /* indirection array pointer */
- xfs_extnum_t nextents; /* number of extents in file */
-
- ASSERT(!(ifp->if_flags & XFS_IFEXTIREC));
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
- ASSERT(nextents <= XFS_LINEAR_EXTS);
-
- erp = kmem_alloc(sizeof(xfs_ext_irec_t), KM_NOFS);
-
- if (nextents == 0) {
- ifp->if_u1.if_extents = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS);
- } else if (!ifp->if_real_bytes) {
- xfs_iext_inline_to_direct(ifp, XFS_IEXT_BUFSZ);
- } else if (ifp->if_real_bytes < XFS_IEXT_BUFSZ) {
- xfs_iext_realloc_direct(ifp, XFS_IEXT_BUFSZ);
- }
- erp->er_extbuf = ifp->if_u1.if_extents;
- erp->er_extcount = nextents;
- erp->er_extoff = 0;
-
- ifp->if_flags |= XFS_IFEXTIREC;
- ifp->if_real_bytes = XFS_IEXT_BUFSZ;
- ifp->if_bytes = nextents * sizeof(xfs_bmbt_rec_t);
- ifp->if_u1.if_ext_irec = erp;
-
- return;
-}
-
-/*
- * Allocate and initialize a new entry in the indirection array.
- */
-xfs_ext_irec_t *
-xfs_iext_irec_new(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int erp_idx) /* index for new irec */
-{
- xfs_ext_irec_t *erp; /* indirection array pointer */
- int i; /* loop counter */
- int nlists; /* number of irec's (ex lists) */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
-
- /* Resize indirection array */
- xfs_iext_realloc_indirect(ifp, ++nlists *
- sizeof(xfs_ext_irec_t));
- /*
- * Move records down in the array so the
- * new page can use erp_idx.
- */
- erp = ifp->if_u1.if_ext_irec;
- for (i = nlists - 1; i > erp_idx; i--) {
- memmove(&erp[i], &erp[i-1], sizeof(xfs_ext_irec_t));
- }
- ASSERT(i == erp_idx);
-
- /* Initialize new extent record */
- erp = ifp->if_u1.if_ext_irec;
- erp[erp_idx].er_extbuf = kmem_alloc(XFS_IEXT_BUFSZ, KM_NOFS);
- ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ;
- memset(erp[erp_idx].er_extbuf, 0, XFS_IEXT_BUFSZ);
- erp[erp_idx].er_extcount = 0;
- erp[erp_idx].er_extoff = erp_idx > 0 ?
- erp[erp_idx-1].er_extoff + erp[erp_idx-1].er_extcount : 0;
- return (&erp[erp_idx]);
-}
-
-/*
- * Remove a record from the indirection array.
- */
-void
-xfs_iext_irec_remove(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int erp_idx) /* irec index to remove */
-{
- xfs_ext_irec_t *erp; /* indirection array pointer */
- int i; /* loop counter */
- int nlists; /* number of irec's (ex lists) */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- if (erp->er_extbuf) {
- xfs_iext_irec_update_extoffs(ifp, erp_idx + 1,
- -erp->er_extcount);
- kmem_free(erp->er_extbuf);
- }
- /* Compact extent records */
- erp = ifp->if_u1.if_ext_irec;
- for (i = erp_idx; i < nlists - 1; i++) {
- memmove(&erp[i], &erp[i+1], sizeof(xfs_ext_irec_t));
- }
- /*
- * Manually free the last extent record from the indirection
- * array. A call to xfs_iext_realloc_indirect() with a size
- * of zero would result in a call to xfs_iext_destroy() which
- * would in turn call this function again, creating a nasty
- * infinite loop.
- */
- if (--nlists) {
- xfs_iext_realloc_indirect(ifp,
- nlists * sizeof(xfs_ext_irec_t));
- } else {
- kmem_free(ifp->if_u1.if_ext_irec);
- }
- ifp->if_real_bytes = nlists * XFS_IEXT_BUFSZ;
-}
-
-/*
- * This is called to clean up large amounts of unused memory allocated
- * by the indirection array. Before compacting anything though, verify
- * that the indirection array is still needed and switch back to the
- * linear extent list (or even the inline buffer) if possible. The
- * compaction policy is as follows:
- *
- * Full Compaction: Extents fit into a single page (or inline buffer)
- * Partial Compaction: Extents occupy less than 50% of allocated space
- * No Compaction: Extents occupy at least 50% of allocated space
- */
-void
-xfs_iext_irec_compact(
- xfs_ifork_t *ifp) /* inode fork pointer */
-{
- xfs_extnum_t nextents; /* number of extents in file */
- int nlists; /* number of irec's (ex lists) */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
-
- if (nextents == 0) {
- xfs_iext_destroy(ifp);
- } else if (nextents <= XFS_INLINE_EXTS) {
- xfs_iext_indirect_to_direct(ifp);
- xfs_iext_direct_to_inline(ifp, nextents);
- } else if (nextents <= XFS_LINEAR_EXTS) {
- xfs_iext_indirect_to_direct(ifp);
- } else if (nextents < (nlists * XFS_LINEAR_EXTS) >> 1) {
- xfs_iext_irec_compact_pages(ifp);
- }
-}
-
-/*
- * Combine extents from neighboring extent pages.
- */
-void
-xfs_iext_irec_compact_pages(
- xfs_ifork_t *ifp) /* inode fork pointer */
-{
- xfs_ext_irec_t *erp, *erp_next;/* pointers to irec entries */
- int erp_idx = 0; /* indirection array index */
- int nlists; /* number of irec's (ex lists) */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- while (erp_idx < nlists - 1) {
- erp = &ifp->if_u1.if_ext_irec[erp_idx];
- erp_next = erp + 1;
- if (erp_next->er_extcount <=
- (XFS_LINEAR_EXTS - erp->er_extcount)) {
- memcpy(&erp->er_extbuf[erp->er_extcount],
- erp_next->er_extbuf, erp_next->er_extcount *
- sizeof(xfs_bmbt_rec_t));
- erp->er_extcount += erp_next->er_extcount;
- /*
- * Free page before removing extent record
- * so er_extoffs don't get modified in
- * xfs_iext_irec_remove.
- */
- kmem_free(erp_next->er_extbuf);
- erp_next->er_extbuf = NULL;
- xfs_iext_irec_remove(ifp, erp_idx + 1);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- } else {
- erp_idx++;
- }
- }
-}
-
-/*
- * This is called to update the er_extoff field in the indirection
- * array when extents have been added or removed from one of the
- * extent lists. erp_idx contains the irec index to begin updating
- * at and ext_diff contains the number of extents that were added
- * or removed.
- */
-void
-xfs_iext_irec_update_extoffs(
- xfs_ifork_t *ifp, /* inode fork pointer */
- int erp_idx, /* irec index to update */
- int ext_diff) /* number of new extents */
-{
- int i; /* loop counter */
- int nlists; /* number of irec's (ex lists */
-
- ASSERT(ifp->if_flags & XFS_IFEXTIREC);
- nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
- for (i = erp_idx; i < nlists; i++) {
- ifp->if_u1.if_ext_irec[i].er_extoff += ext_diff;
- }
-}
-
/*
* Test whether it is appropriate to check an inode for and free post EOF
* blocks. The 'force' parameter determines whether we should also consider
return true;
}
-
projects / mirror_ubuntu-bionic-kernel.git / blobdiff