[XFS] Add op_flags field and helpers to xfs_da_args
authorBarry Naujok <bnaujok@sgi.com>
Wed, 21 May 2008 06:42:05 +0000 (16:42 +1000)
committerNiv Sardi <xaiki@debian.org>
Mon, 28 Jul 2008 06:58:37 +0000 (16:58 +1000)
The end of the xfs_da_args structure has 4 unsigned char fields for
true/false information on directory and attr operations using the
xfs_da_args structure.

The following converts these 4 into a op_flags field that uses the first 4
bits for these fields and allows expansion for future operation
information (eg. case-insensitive lookup request).

SGI-PV: 981520
SGI-Modid: xfs-linux-melb:xfs-kern:31206a

Signed-off-by: Barry Naujok <bnaujok@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>
fs/xfs/xfs_attr.c
fs/xfs/xfs_attr_leaf.c
fs/xfs/xfs_da_btree.c
fs/xfs/xfs_da_btree.h
fs/xfs/xfs_dir2.c
fs/xfs/xfs_dir2_block.c
fs/xfs/xfs_dir2_leaf.c
fs/xfs/xfs_dir2_node.c
fs/xfs/xfs_dir2_sf.c
fs/xfs/xfs_dir2_trace.c

index 5e5dbe6..557dad6 100644 (file)
@@ -241,8 +241,7 @@ xfs_attr_set_int(xfs_inode_t *dp, struct xfs_name *name,
        args.firstblock = &firstblock;
        args.flist = &flist;
        args.whichfork = XFS_ATTR_FORK;
-       args.addname = 1;
-       args.oknoent = 1;
+       args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
 
        /*
         * Determine space new attribute will use, and if it would be
@@ -974,7 +973,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
                        xfs_da_brelse(args->trans, bp);
                        return(retval);
                }
-               args->rename = 1;                       /* an atomic rename */
+               args->op_flags |= XFS_DA_OP_RENAME;     /* an atomic rename */
                args->blkno2 = args->blkno;             /* set 2nd entry info*/
                args->index2 = args->index;
                args->rmtblkno2 = args->rmtblkno;
@@ -1054,7 +1053,7 @@ xfs_attr_leaf_addname(xfs_da_args_t *args)
         * so that one disappears and one appears atomically.  Then we
         * must remove the "old" attribute/value pair.
         */
-       if (args->rename) {
+       if (args->op_flags & XFS_DA_OP_RENAME) {
                /*
                 * In a separate transaction, set the incomplete flag on the
                 * "old" attr and clear the incomplete flag on the "new" attr.
@@ -1307,7 +1306,7 @@ restart:
        } else if (retval == EEXIST) {
                if (args->flags & ATTR_CREATE)
                        goto out;
-               args->rename = 1;                       /* atomic rename op */
+               args->op_flags |= XFS_DA_OP_RENAME;     /* atomic rename op */
                args->blkno2 = args->blkno;             /* set 2nd entry info*/
                args->index2 = args->index;
                args->rmtblkno2 = args->rmtblkno;
@@ -1425,7 +1424,7 @@ restart:
         * so that one disappears and one appears atomically.  Then we
         * must remove the "old" attribute/value pair.
         */
-       if (args->rename) {
+       if (args->op_flags & XFS_DA_OP_RENAME) {
                /*
                 * In a separate transaction, set the incomplete flag on the
                 * "old" attr and clear the incomplete flag on the "new" attr.
index a85e9ca..cb345e6 100644 (file)
@@ -369,9 +369,10 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
         * Fix up the start offset of the attribute fork
         */
        totsize -= size;
-       if (totsize == sizeof(xfs_attr_sf_hdr_t) && !args->addname &&
-           (mp->m_flags & XFS_MOUNT_ATTR2) && 
-           (dp->i_d.di_format != XFS_DINODE_FMT_BTREE)) {
+       if (totsize == sizeof(xfs_attr_sf_hdr_t) &&
+                               !(args->op_flags & XFS_DA_OP_ADDNAME) &&
+                               (mp->m_flags & XFS_MOUNT_ATTR2) &&
+                               (dp->i_d.di_format != XFS_DINODE_FMT_BTREE)) {
                /*
                 * Last attribute now removed, revert to original
                 * inode format making all literal area available
@@ -389,9 +390,10 @@ xfs_attr_shortform_remove(xfs_da_args_t *args)
                xfs_idata_realloc(dp, -size, XFS_ATTR_FORK);
                dp->i_d.di_forkoff = xfs_attr_shortform_bytesfit(dp, totsize);
                ASSERT(dp->i_d.di_forkoff);
-               ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) || args->addname ||
-                       !(mp->m_flags & XFS_MOUNT_ATTR2) ||
-                       dp->i_d.di_format == XFS_DINODE_FMT_BTREE);
+               ASSERT(totsize > sizeof(xfs_attr_sf_hdr_t) ||
+                               (args->op_flags & XFS_DA_OP_ADDNAME) ||
+                               !(mp->m_flags & XFS_MOUNT_ATTR2) ||
+                               dp->i_d.di_format == XFS_DINODE_FMT_BTREE);
                dp->i_afp->if_ext_max =
                        XFS_IFORK_ASIZE(dp) / (uint)sizeof(xfs_bmbt_rec_t);
                dp->i_df.if_ext_max =
@@ -531,7 +533,7 @@ xfs_attr_shortform_to_leaf(xfs_da_args_t *args)
        nargs.total = args->total;
        nargs.whichfork = XFS_ATTR_FORK;
        nargs.trans = args->trans;
-       nargs.oknoent = 1;
+       nargs.op_flags = XFS_DA_OP_OKNOENT;
 
        sfe = &sf->list[0];
        for (i = 0; i < sf->hdr.count; i++) {
@@ -853,7 +855,7 @@ xfs_attr_leaf_to_shortform(xfs_dabuf_t *bp, xfs_da_args_t *args, int forkoff)
        nargs.total = args->total;
        nargs.whichfork = XFS_ATTR_FORK;
        nargs.trans = args->trans;
-       nargs.oknoent = 1;
+       nargs.op_flags = XFS_DA_OP_OKNOENT;
        entry = &leaf->entries[0];
        for (i = 0; i < be16_to_cpu(leaf->hdr.count); entry++, i++) {
                if (entry->flags & XFS_ATTR_INCOMPLETE)
@@ -1155,7 +1157,7 @@ xfs_attr_leaf_add_work(xfs_dabuf_t *bp, xfs_da_args_t *args, int mapindex)
        entry->hashval = cpu_to_be32(args->hashval);
        entry->flags = tmp ? XFS_ATTR_LOCAL : 0;
        entry->flags |= XFS_ATTR_NSP_ARGS_TO_ONDISK(args->flags);
-       if (args->rename) {
+       if (args->op_flags & XFS_DA_OP_RENAME) {
                entry->flags |= XFS_ATTR_INCOMPLETE;
                if ((args->blkno2 == args->blkno) &&
                    (args->index2 <= args->index)) {
index ae4b18c..edc0aef 100644 (file)
@@ -1431,7 +1431,7 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
        }
        if (level < 0) {
                *result = XFS_ERROR(ENOENT);    /* we're out of our tree */
-               ASSERT(args->oknoent);
+               ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
                return(0);
        }
 
index e64c692..8face64 100644 (file)
@@ -132,14 +132,19 @@ typedef struct xfs_da_args {
        int             index2;         /* index of 2nd attr in blk */
        xfs_dablk_t     rmtblkno2;      /* remote attr value starting blkno */
        int             rmtblkcnt2;     /* remote attr value block count */
-       unsigned char   justcheck;      /* T/F: check for ok with no space */
-       unsigned char   rename;         /* T/F: this is an atomic rename op */
-       unsigned char   addname;        /* T/F: this is an add operation */
-       unsigned char   oknoent;        /* T/F: ok to return ENOENT, else die */
+       int             op_flags;       /* operation flags */
        enum xfs_dacmp  cmpresult;      /* name compare result for lookups */
 } xfs_da_args_t;
 
 /*
+ * Operation flags:
+ */
+#define XFS_DA_OP_JUSTCHECK    0x0001  /* check for ok with no space */
+#define XFS_DA_OP_RENAME       0x0002  /* this is an atomic rename op */
+#define XFS_DA_OP_ADDNAME      0x0004  /* this is an add operation */
+#define XFS_DA_OP_OKNOENT      0x0008  /* lookup/add op, ENOENT ok, else die */
+
+/*
  * Structure to describe buffer(s) for a block.
  * This is needed in the directory version 2 format case, when
  * multiple non-contiguous fsblocks might be needed to cover one
index 675899b..3387acd 100644 (file)
@@ -46,6 +46,8 @@
 
 struct xfs_name xfs_name_dotdot = {"..", 2};
 
+extern const struct xfs_nameops xfs_default_nameops;
+
 void
 xfs_dir_mount(
        xfs_mount_t     *mp)
@@ -173,8 +175,7 @@ xfs_dir_createname(
        args.total = total;
        args.whichfork = XFS_DATA_FORK;
        args.trans = tp;
-       args.justcheck = 0;
-       args.addname = args.oknoent = 1;
+       args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
 
        if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
                rval = xfs_dir2_sf_addname(&args);
@@ -215,7 +216,7 @@ xfs_dir_lookup(
        args.dp = dp;
        args.whichfork = XFS_DATA_FORK;
        args.trans = tp;
-       args.oknoent = 1;
+       args.op_flags = XFS_DA_OP_OKNOENT;
        args.cmpresult = XFS_CMP_DIFFERENT;
 
        if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
@@ -267,7 +268,7 @@ xfs_dir_removename(
        args.total = total;
        args.whichfork = XFS_DATA_FORK;
        args.trans = tp;
-       args.justcheck = args.addname = args.oknoent = 0;
+       args.op_flags = 0;
 
        if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
                rval = xfs_dir2_sf_removename(&args);
@@ -350,7 +351,7 @@ xfs_dir_replace(
        args.total = total;
        args.whichfork = XFS_DATA_FORK;
        args.trans = tp;
-       args.justcheck = args.addname = args.oknoent = 0;
+       args.op_flags = 0;
 
        if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
                rval = xfs_dir2_sf_replace(&args);
@@ -394,7 +395,8 @@ xfs_dir_canenter(
        args.dp = dp;
        args.whichfork = XFS_DATA_FORK;
        args.trans = tp;
-       args.justcheck = args.addname = args.oknoent = 1;
+       args.op_flags = XFS_DA_OP_JUSTCHECK | XFS_DA_OP_ADDNAME |
+                                                       XFS_DA_OP_OKNOENT;
 
        if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL)
                rval = xfs_dir2_sf_addname(&args);
index 9858849..dee2259 100644 (file)
@@ -215,7 +215,7 @@ xfs_dir2_block_addname(
        /*
         * If this isn't a real add, we're done with the buffer.
         */
-       if (args->justcheck)
+       if (args->op_flags & XFS_DA_OP_JUSTCHECK)
                xfs_da_brelse(tp, bp);
        /*
         * If we don't have space for the new entry & leaf ...
@@ -225,7 +225,7 @@ xfs_dir2_block_addname(
                 * Not trying to actually do anything, or don't have
                 * a space reservation: return no-space.
                 */
-               if (args->justcheck || args->total == 0)
+               if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
                        return XFS_ERROR(ENOSPC);
                /*
                 * Convert to the next larger format.
@@ -240,7 +240,7 @@ xfs_dir2_block_addname(
        /*
         * Just checking, and it would work, so say so.
         */
-       if (args->justcheck)
+       if (args->op_flags & XFS_DA_OP_JUSTCHECK)
                return 0;
        needlog = needscan = 0;
        /*
@@ -674,7 +674,7 @@ xfs_dir2_block_lookup_int(
                else
                        high = mid - 1;
                if (low > high) {
-                       ASSERT(args->oknoent);
+                       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
                        xfs_da_brelse(tp, bp);
                        return XFS_ERROR(ENOENT);
                }
@@ -713,7 +713,7 @@ xfs_dir2_block_lookup_int(
        } while (++mid < be32_to_cpu(btp->count) &&
                        be32_to_cpu(blp[mid].hashval) == hash);
 
-       ASSERT(args->oknoent);
+       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
        /*
         * Here, we can only be doing a lookup (not a rename or replace).
         * If a case-insensitive match was found earlier, return success.
index b52903b..2ebbed4 100644 (file)
@@ -263,20 +263,21 @@ xfs_dir2_leaf_addname(
         * If we don't have enough free bytes but we can make enough
         * by compacting out stale entries, we'll do that.
         */
-       if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] < needbytes &&
-           be16_to_cpu(leaf->hdr.stale) > 1) {
+       if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] <
+                               needbytes && be16_to_cpu(leaf->hdr.stale) > 1) {
                compact = 1;
        }
        /*
         * Otherwise if we don't have enough free bytes we need to
         * convert to node form.
         */
-       else if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] <
-                needbytes) {
+       else if ((char *)bestsp - (char *)&leaf->ents[be16_to_cpu(
+                                               leaf->hdr.count)] < needbytes) {
                /*
                 * Just checking or no space reservation, give up.
                 */
-               if (args->justcheck || args->total == 0) {
+               if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
+                                                       args->total == 0) {
                        xfs_da_brelse(tp, lbp);
                        return XFS_ERROR(ENOSPC);
                }
@@ -301,7 +302,7 @@ xfs_dir2_leaf_addname(
         * If just checking, then it will fit unless we needed to allocate
         * a new data block.
         */
-       if (args->justcheck) {
+       if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
                xfs_da_brelse(tp, lbp);
                return use_block == -1 ? XFS_ERROR(ENOSPC) : 0;
        }
@@ -1414,7 +1415,7 @@ xfs_dir2_leaf_lookup_int(
                        cbp = dbp;
                }
        }
-       ASSERT(args->oknoent);
+       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
        /*
         * Here, we can only be doing a lookup (not a rename or replace).
         * If a case-insensitive match was found earlier, release the current
index fedf8f9..c71cff8 100644 (file)
@@ -226,7 +226,7 @@ xfs_dir2_leafn_add(
        ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
               be32_to_cpu(leaf->ents[index].hashval) >= args->hashval);
 
-       if (args->justcheck)
+       if (args->op_flags & XFS_DA_OP_JUSTCHECK)
                return 0;
 
        /*
@@ -515,7 +515,7 @@ xfs_dir2_leafn_lookup_for_addname(
        /* Didn't find any space */
        fi = -1;
 out:
-       ASSERT(args->oknoent);
+       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
        if (curbp) {
                /* Giving back a free block. */
                state->extravalid = 1;
@@ -638,7 +638,8 @@ xfs_dir2_leafn_lookup_for_entry(
        /* Didn't find an exact match. */
        error = ENOENT;
        di = -1;
-       ASSERT(index == be16_to_cpu(leaf->hdr.count) || args->oknoent);
+       ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
+                                       (args->op_flags & XFS_DA_OP_OKNOENT));
 out:
        if (curbp) {
                /* Giving back a data block. */
@@ -669,7 +670,7 @@ xfs_dir2_leafn_lookup_int(
        int                     *indexp,        /* out: leaf entry index */
        xfs_da_state_t          *state)         /* state to fill in */
 {
-       if (args->addname)
+       if (args->op_flags & XFS_DA_OP_ADDNAME)
                return xfs_dir2_leafn_lookup_for_addname(bp, args, indexp,
                                                        state);
        return xfs_dir2_leafn_lookup_for_entry(bp, args, indexp, state);
@@ -1383,7 +1384,7 @@ xfs_dir2_node_addname(
                /*
                 * It worked, fix the hash values up the btree.
                 */
-               if (!args->justcheck)
+               if (!(args->op_flags & XFS_DA_OP_JUSTCHECK))
                        xfs_da_fixhashpath(state, &state->path);
        } else {
                /*
@@ -1566,7 +1567,8 @@ xfs_dir2_node_addname_int(
                /*
                 * Not allowed to allocate, return failure.
                 */
-               if (args->justcheck || args->total == 0) {
+               if ((args->op_flags & XFS_DA_OP_JUSTCHECK) ||
+                                                       args->total == 0) {
                        /*
                         * Drop the freespace buffer unless it came from our
                         * caller.
@@ -1712,7 +1714,7 @@ xfs_dir2_node_addname_int(
                /*
                 * If just checking, we succeeded.
                 */
-               if (args->justcheck) {
+               if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
                        if ((fblk == NULL || fblk->bp == NULL) && fbp != NULL)
                                xfs_da_buf_done(fbp);
                        return 0;
index dcd09ca..9409fd3 100644 (file)
@@ -332,7 +332,7 @@ xfs_dir2_sf_addname(
                /*
                 * Just checking or no space reservation, it doesn't fit.
                 */
-               if (args->justcheck || args->total == 0)
+               if ((args->op_flags & XFS_DA_OP_JUSTCHECK) || args->total == 0)
                        return XFS_ERROR(ENOSPC);
                /*
                 * Convert to block form then add the name.
@@ -345,7 +345,7 @@ xfs_dir2_sf_addname(
        /*
         * Just checking, it fits.
         */
-       if (args->justcheck)
+       if (args->op_flags & XFS_DA_OP_JUSTCHECK)
                return 0;
        /*
         * Do it the easy way - just add it at the end.
@@ -869,7 +869,7 @@ xfs_dir2_sf_lookup(
                                return XFS_ERROR(EEXIST);
                }
        }
-       ASSERT(args->oknoent);
+       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
        /*
         * Here, we can only be doing a lookup (not a rename or replace).
         * If a case-insensitive match was found earlier, return "found".
@@ -1071,7 +1071,7 @@ xfs_dir2_sf_replace(
                 * Didn't find it.
                 */
                if (i == sfp->hdr.count) {
-                       ASSERT(args->oknoent);
+                       ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
 #if XFS_BIG_INUMS
                        if (i8elevated)
                                xfs_dir2_sf_toino4(args);
index f3fb2ff..6cc7c0c 100644 (file)
@@ -85,7 +85,8 @@ xfs_dir2_trace_args(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck, NULL, NULL);
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
+               NULL, NULL);
 }
 
 void
@@ -100,7 +101,7 @@ xfs_dir2_trace_args_b(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck,
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
                (void *)(bp ? bp->bps[0] : NULL), NULL);
 }
 
@@ -117,7 +118,7 @@ xfs_dir2_trace_args_bb(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck,
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
                (void *)(lbp ? lbp->bps[0] : NULL),
                (void *)(dbp ? dbp->bps[0] : NULL));
 }
@@ -157,8 +158,8 @@ xfs_dir2_trace_args_db(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck, (void *)(long)db,
-               (void *)dbp);
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
+               (void *)(long)db, (void *)dbp);
 }
 
 void
@@ -173,7 +174,7 @@ xfs_dir2_trace_args_i(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck,
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
                (void *)((unsigned long)(i >> 32)),
                (void *)((unsigned long)(i & 0xFFFFFFFF)));
 }
@@ -190,7 +191,8 @@ xfs_dir2_trace_args_s(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck, (void *)(long)s, NULL);
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
+               (void *)(long)s, NULL);
 }
 
 void
@@ -208,7 +210,7 @@ xfs_dir2_trace_args_sb(
                (void *)((unsigned long)(args->inumber >> 32)),
                (void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
                (void *)args->dp, (void *)args->trans,
-               (void *)(unsigned long)args->justcheck, (void *)(long)s,
-               (void *)dbp);
+               (void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
+               (void *)(long)s, (void *)dbp);
 }
 #endif /* XFS_DIR2_TRACE */