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Diffstat (limited to 'fs/xfs/xfs_symlink.c')
-rw-r--r--fs/xfs/xfs_symlink.c196
1 files changed, 13 insertions, 183 deletions
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index f4895b662fcb..2f2a7c005be2 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -18,200 +18,29 @@
*/
#include "xfs.h"
#include "xfs_fs.h"
-#include "xfs_types.h"
+#include "xfs_format.h"
#include "xfs_bit.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
-#include "xfs_dir2.h"
#include "xfs_mount.h"
#include "xfs_da_btree.h"
+#include "xfs_dir2_format.h"
+#include "xfs_dir2.h"
#include "xfs_bmap_btree.h"
#include "xfs_ialloc_btree.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
-#include "xfs_inode_item.h"
-#include "xfs_itable.h"
#include "xfs_ialloc.h"
#include "xfs_alloc.h"
#include "xfs_bmap.h"
+#include "xfs_bmap_util.h"
#include "xfs_error.h"
#include "xfs_quota.h"
-#include "xfs_utils.h"
#include "xfs_trans_space.h"
-#include "xfs_log_priv.h"
#include "xfs_trace.h"
#include "xfs_symlink.h"
-#include "xfs_cksum.h"
-#include "xfs_buf_item.h"
-
-
-/*
- * Each contiguous block has a header, so it is not just a simple pathlen
- * to FSB conversion.
- */
-int
-xfs_symlink_blocks(
- struct xfs_mount *mp,
- int pathlen)
-{
- int buflen = XFS_SYMLINK_BUF_SPACE(mp, mp->m_sb.sb_blocksize);
-
- return (pathlen + buflen - 1) / buflen;
-}
-
-static int
-xfs_symlink_hdr_set(
- struct xfs_mount *mp,
- xfs_ino_t ino,
- uint32_t offset,
- uint32_t size,
- struct xfs_buf *bp)
-{
- struct xfs_dsymlink_hdr *dsl = bp->b_addr;
-
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return 0;
-
- dsl->sl_magic = cpu_to_be32(XFS_SYMLINK_MAGIC);
- dsl->sl_offset = cpu_to_be32(offset);
- dsl->sl_bytes = cpu_to_be32(size);
- uuid_copy(&dsl->sl_uuid, &mp->m_sb.sb_uuid);
- dsl->sl_owner = cpu_to_be64(ino);
- dsl->sl_blkno = cpu_to_be64(bp->b_bn);
- bp->b_ops = &xfs_symlink_buf_ops;
-
- return sizeof(struct xfs_dsymlink_hdr);
-}
-
-/*
- * Checking of the symlink header is split into two parts. the verifier does
- * CRC, location and bounds checking, the unpacking function checks the path
- * parameters and owner.
- */
-bool
-xfs_symlink_hdr_ok(
- struct xfs_mount *mp,
- xfs_ino_t ino,
- uint32_t offset,
- uint32_t size,
- struct xfs_buf *bp)
-{
- struct xfs_dsymlink_hdr *dsl = bp->b_addr;
-
- if (offset != be32_to_cpu(dsl->sl_offset))
- return false;
- if (size != be32_to_cpu(dsl->sl_bytes))
- return false;
- if (ino != be64_to_cpu(dsl->sl_owner))
- return false;
-
- /* ok */
- return true;
-}
-
-static bool
-xfs_symlink_verify(
- struct xfs_buf *bp)
-{
- struct xfs_mount *mp = bp->b_target->bt_mount;
- struct xfs_dsymlink_hdr *dsl = bp->b_addr;
-
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return false;
- if (dsl->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC))
- return false;
- if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_uuid))
- return false;
- if (bp->b_bn != be64_to_cpu(dsl->sl_blkno))
- return false;
- if (be32_to_cpu(dsl->sl_offset) +
- be32_to_cpu(dsl->sl_bytes) >= MAXPATHLEN)
- return false;
- if (dsl->sl_owner == 0)
- return false;
-
- return true;
-}
-
-static void
-xfs_symlink_read_verify(
- struct xfs_buf *bp)
-{
- struct xfs_mount *mp = bp->b_target->bt_mount;
-
- /* no verification of non-crc buffers */
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return;
-
- if (!xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
- offsetof(struct xfs_dsymlink_hdr, sl_crc)) ||
- !xfs_symlink_verify(bp)) {
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
- xfs_buf_ioerror(bp, EFSCORRUPTED);
- }
-}
-
-static void
-xfs_symlink_write_verify(
- struct xfs_buf *bp)
-{
- struct xfs_mount *mp = bp->b_target->bt_mount;
- struct xfs_buf_log_item *bip = bp->b_fspriv;
-
- /* no verification of non-crc buffers */
- if (!xfs_sb_version_hascrc(&mp->m_sb))
- return;
-
- if (!xfs_symlink_verify(bp)) {
- XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
- xfs_buf_ioerror(bp, EFSCORRUPTED);
- return;
- }
-
- if (bip) {
- struct xfs_dsymlink_hdr *dsl = bp->b_addr;
- dsl->sl_lsn = cpu_to_be64(bip->bli_item.li_lsn);
- }
- xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
- offsetof(struct xfs_dsymlink_hdr, sl_crc));
-}
-
-const struct xfs_buf_ops xfs_symlink_buf_ops = {
- .verify_read = xfs_symlink_read_verify,
- .verify_write = xfs_symlink_write_verify,
-};
-
-void
-xfs_symlink_local_to_remote(
- struct xfs_trans *tp,
- struct xfs_buf *bp,
- struct xfs_inode *ip,
- struct xfs_ifork *ifp)
-{
- struct xfs_mount *mp = ip->i_mount;
- char *buf;
-
- if (!xfs_sb_version_hascrc(&mp->m_sb)) {
- bp->b_ops = NULL;
- memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
- return;
- }
-
- /*
- * As this symlink fits in an inode literal area, it must also fit in
- * the smallest buffer the filesystem supports.
- */
- ASSERT(BBTOB(bp->b_length) >=
- ifp->if_bytes + sizeof(struct xfs_dsymlink_hdr));
-
- bp->b_ops = &xfs_symlink_buf_ops;
-
- buf = bp->b_addr;
- buf += xfs_symlink_hdr_set(mp, ip->i_ino, 0, ifp->if_bytes, bp);
- memcpy(buf, ifp->if_u1.if_data, ifp->if_bytes);
-}
/* ----- Kernel only functions below ----- */
STATIC int
@@ -386,8 +215,11 @@ xfs_symlink(
/*
* Make sure that we have allocated dquot(s) on disk.
*/
- error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid,
- XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp, &pdqp);
+ error = xfs_qm_vop_dqalloc(dp,
+ xfs_kuid_to_uid(current_fsuid()),
+ xfs_kgid_to_gid(current_fsgid()), prid,
+ XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT,
+ &udqp, &gdqp, &pdqp);
if (error)
goto std_return;
@@ -402,12 +234,10 @@ xfs_symlink(
else
fs_blocks = xfs_symlink_blocks(mp, pathlen);
resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
- error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
- XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, resblks, 0);
if (error == ENOSPC && fs_blocks == 0) {
resblks = 0;
- error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
- XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_symlink, 0, 0);
}
if (error) {
cancel_flags = 0;
@@ -710,8 +540,8 @@ xfs_inactive_symlink_rmt(
* Put an itruncate log reservation in the new transaction
* for our caller.
*/
- if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
- XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
+ error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
+ if (error) {
ASSERT(XFS_FORCED_SHUTDOWN(mp));
goto error0;
}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-17 14:53:10 +0000