diff options
Diffstat (limited to 'fs/xfs/xfs_attr_list.c')
| -rw-r--r-- | fs/xfs/xfs_attr_list.c | 400 |
1 files changed, 172 insertions, 228 deletions
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c index a58034049995..379b48d015d2 100644 --- a/fs/xfs/xfs_attr_list.c +++ b/fs/xfs/xfs_attr_list.c @@ -6,26 +6,23 @@ */ #include "xfs.h" #include "xfs_fs.h" +#include "xfs_shared.h" #include "xfs_format.h" #include "xfs_log_format.h" #include "xfs_trans_resv.h" -#include "xfs_bit.h" #include "xfs_mount.h" #include "xfs_da_format.h" -#include "xfs_da_btree.h" #include "xfs_inode.h" #include "xfs_trans.h" -#include "xfs_inode_item.h" #include "xfs_bmap.h" +#include "xfs_da_btree.h" #include "xfs_attr.h" #include "xfs_attr_sf.h" -#include "xfs_attr_remote.h" #include "xfs_attr_leaf.h" #include "xfs_error.h" #include "xfs_trace.h" -#include "xfs_buf_item.h" -#include "xfs_cksum.h" #include "xfs_dir2.h" +#include "xfs_health.h" STATIC int xfs_attr_shortform_compare(const void *a, const void *b) @@ -49,30 +46,25 @@ xfs_attr_shortform_compare(const void *a, const void *b) /* * Copy out entries of shortform attribute lists for attr_list(). * Shortform attribute lists are not stored in hashval sorted order. - * If the output buffer is not large enough to hold them all, then we + * If the output buffer is not large enough to hold them all, then * we have to calculate each entries' hashvalue and sort them before * we can begin returning them to the user. */ static int -xfs_attr_shortform_list(xfs_attr_list_context_t *context) +xfs_attr_shortform_list( + struct xfs_attr_list_context *context) { - attrlist_cursor_kern_t *cursor; - xfs_attr_sf_sort_t *sbuf, *sbp; - xfs_attr_shortform_t *sf; - xfs_attr_sf_entry_t *sfe; - xfs_inode_t *dp; - int sbsize, nsbuf, count, i; - - ASSERT(context != NULL); - dp = context->dp; - ASSERT(dp != NULL); - ASSERT(dp->i_afp != NULL); - sf = (xfs_attr_shortform_t *)dp->i_afp->if_u1.if_data; + struct xfs_attrlist_cursor_kern *cursor = &context->cursor; + struct xfs_inode *dp = context->dp; + struct xfs_attr_sf_sort *sbuf, *sbp; + struct xfs_attr_sf_hdr *sf = dp->i_af.if_data; + struct xfs_attr_sf_entry *sfe; + int sbsize, nsbuf, count, i; + int error = 0; + ASSERT(sf != NULL); - if (!sf->hdr.count) + if (!sf->count) return 0; - cursor = context->cursor; - ASSERT(cursor != NULL); trace_xfs_attr_list_sf(context); @@ -87,12 +79,20 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) */ if (context->bufsize == 0 || (XFS_ISRESET_CURSOR(cursor) && - (dp->i_afp->if_bytes + sf->hdr.count * 16) < context->bufsize)) { - for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { + (dp->i_af.if_bytes + sf->count * 16) < context->bufsize)) { + for (i = 0, sfe = xfs_attr_sf_firstentry(sf); i < sf->count; i++) { + if (XFS_IS_CORRUPT(context->dp->i_mount, + !xfs_attr_namecheck(sfe->flags, + sfe->nameval, + sfe->namelen))) { + xfs_dirattr_mark_sick(context->dp, XFS_ATTR_FORK); + return -EFSCORRUPTED; + } context->put_listent(context, sfe->flags, sfe->nameval, (int)sfe->namelen, + &sfe->nameval[sfe->namelen], (int)sfe->valuelen); /* * Either search callback finished early or @@ -100,7 +100,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) */ if (context->seen_enough) break; - sfe = XFS_ATTR_SF_NEXTENTRY(sfe); + sfe = xfs_attr_sf_nextentry(sfe); } trace_xfs_attr_list_sf_all(context); return 0; @@ -113,34 +113,41 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) /* * It didn't all fit, so we have to sort everything on hashval. */ - sbsize = sf->hdr.count * sizeof(*sbuf); - sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS); + sbsize = sf->count * sizeof(*sbuf); + sbp = sbuf = kmalloc(sbsize, + GFP_KERNEL | __GFP_NOLOCKDEP | __GFP_NOFAIL); /* * Scan the attribute list for the rest of the entries, storing * the relevant info from only those that match into a buffer. */ nsbuf = 0; - for (i = 0, sfe = &sf->list[0]; i < sf->hdr.count; i++) { + for (i = 0, sfe = xfs_attr_sf_firstentry(sf); i < sf->count; i++) { if (unlikely( ((char *)sfe < (char *)sf) || - ((char *)sfe >= ((char *)sf + dp->i_afp->if_bytes)))) { + ((char *)sfe >= ((char *)sf + dp->i_af.if_bytes)) || + !xfs_attr_check_namespace(sfe->flags))) { XFS_CORRUPTION_ERROR("xfs_attr_shortform_list", XFS_ERRLEVEL_LOW, context->dp->i_mount, sfe, sizeof(*sfe)); - kmem_free(sbuf); + kfree(sbuf); + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); return -EFSCORRUPTED; } sbp->entno = i; - sbp->hash = xfs_da_hashname(sfe->nameval, sfe->namelen); sbp->name = sfe->nameval; sbp->namelen = sfe->namelen; /* These are bytes, and both on-disk, don't endian-flip */ + sbp->value = &sfe->nameval[sfe->namelen]; sbp->valuelen = sfe->valuelen; sbp->flags = sfe->flags; - sfe = XFS_ATTR_SF_NEXTENTRY(sfe); + sbp->hash = xfs_attr_hashval(dp->i_mount, sfe->flags, + sfe->nameval, sfe->namelen, + sfe->nameval + sfe->namelen, + sfe->valuelen); + sfe = xfs_attr_sf_nextentry(sfe); sbp++; nsbuf++; } @@ -166,10 +173,8 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) break; } } - if (i == nsbuf) { - kmem_free(sbuf); - return 0; - } + if (i == nsbuf) + goto out; /* * Loop putting entries into the user buffer. @@ -179,18 +184,26 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) cursor->hashval = sbp->hash; cursor->offset = 0; } + if (XFS_IS_CORRUPT(context->dp->i_mount, + !xfs_attr_namecheck(sbp->flags, sbp->name, + sbp->namelen))) { + xfs_dirattr_mark_sick(context->dp, XFS_ATTR_FORK); + error = -EFSCORRUPTED; + goto out; + } context->put_listent(context, sbp->flags, sbp->name, sbp->namelen, + sbp->value, sbp->valuelen); if (context->seen_enough) break; cursor->offset++; } - - kmem_free(sbuf); - return 0; +out: + kfree(sbuf); + return error; } /* @@ -200,7 +213,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) STATIC int xfs_attr_node_list_lookup( struct xfs_attr_list_context *context, - struct attrlist_cursor_kern *cursor, + struct xfs_attrlist_cursor_kern *cursor, struct xfs_buf **pbp) { struct xfs_da3_icnode_hdr nodehdr; @@ -210,6 +223,7 @@ xfs_attr_node_list_lookup( struct xfs_mount *mp = dp->i_mount; struct xfs_trans *tp = context->tp; struct xfs_buf *bp; + xfs_failaddr_t fa; int i; int error = 0; unsigned int expected_level = 0; @@ -218,7 +232,7 @@ xfs_attr_node_list_lookup( ASSERT(*pbp == NULL); cursor->blkno = 0; for (;;) { - error = xfs_da3_node_read(tp, dp, cursor->blkno, -1, &bp, + error = xfs_da3_node_read(tp, dp, cursor->blkno, &bp, XFS_ATTR_FORK); if (error) return error; @@ -234,7 +248,11 @@ xfs_attr_node_list_lookup( goto out_corruptbuf; } - dp->d_ops->node_hdr_from_disk(&nodehdr, node); + fa = xfs_da3_node_header_check(bp, dp->i_ino); + if (fa) + goto out_corruptbuf; + + xfs_da3_node_hdr_from_disk(mp, &nodehdr, node); /* Tree taller than we can handle; bail out! */ if (nodehdr.level >= XFS_DA_NODE_MAXDEPTH) @@ -248,7 +266,7 @@ xfs_attr_node_list_lookup( else expected_level--; - btree = dp->d_ops->node_tree_p(node); + btree = nodehdr.btree; for (i = 0; i < nodehdr.count; btree++, i++) { if (cursor->hashval <= be32_to_cpu(btree->hashval)) { cursor->blkno = be32_to_cpu(btree->before); @@ -263,8 +281,16 @@ xfs_attr_node_list_lookup( return 0; /* We can't point back to the root. */ - if (cursor->blkno == 0) + if (XFS_IS_CORRUPT(mp, cursor->blkno == 0)) { + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); return -EFSCORRUPTED; + } + } + + fa = xfs_attr3_leaf_header_check(bp, dp->i_ino); + if (fa) { + __xfs_buf_mark_corrupt(bp, fa); + goto out_releasebuf; } if (expected_level != 0) @@ -274,7 +300,10 @@ xfs_attr_node_list_lookup( return 0; out_corruptbuf: + xfs_buf_mark_corrupt(bp); +out_releasebuf: xfs_trans_brelse(tp, bp); + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); return -EFSCORRUPTED; } @@ -282,18 +311,18 @@ STATIC int xfs_attr_node_list( struct xfs_attr_list_context *context) { + struct xfs_attrlist_cursor_kern *cursor = &context->cursor; struct xfs_attr3_icleaf_hdr leafhdr; - struct attrlist_cursor_kern *cursor; struct xfs_attr_leafblock *leaf; struct xfs_da_intnode *node; struct xfs_buf *bp; struct xfs_inode *dp = context->dp; struct xfs_mount *mp = dp->i_mount; - int error; + xfs_failaddr_t fa; + int error = 0; trace_xfs_attr_node_list(context); - cursor = context->cursor; cursor->initted = 1; /* @@ -303,44 +332,60 @@ xfs_attr_node_list( */ bp = NULL; if (cursor->blkno > 0) { - error = xfs_da3_node_read(context->tp, dp, cursor->blkno, -1, - &bp, XFS_ATTR_FORK); - if ((error != 0) && (error != -EFSCORRUPTED)) + struct xfs_attr_leaf_entry *entries; + + error = xfs_da3_node_read(context->tp, dp, cursor->blkno, &bp, + XFS_ATTR_FORK); + if (xfs_metadata_is_sick(error)) + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); + if (error != 0 && error != -EFSCORRUPTED) return error; - if (bp) { - struct xfs_attr_leaf_entry *entries; + if (!bp) + goto need_lookup; - node = bp->b_addr; - switch (be16_to_cpu(node->hdr.info.magic)) { - case XFS_DA_NODE_MAGIC: - case XFS_DA3_NODE_MAGIC: - trace_xfs_attr_list_wrong_blk(context); + node = bp->b_addr; + switch (be16_to_cpu(node->hdr.info.magic)) { + case XFS_DA_NODE_MAGIC: + case XFS_DA3_NODE_MAGIC: + trace_xfs_attr_list_wrong_blk(context); + fa = xfs_da3_node_header_check(bp, dp->i_ino); + if (fa) { + __xfs_buf_mark_corrupt(bp, fa); + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); + } + xfs_trans_brelse(context->tp, bp); + bp = NULL; + break; + case XFS_ATTR_LEAF_MAGIC: + case XFS_ATTR3_LEAF_MAGIC: + leaf = bp->b_addr; + fa = xfs_attr3_leaf_header_check(bp, dp->i_ino); + if (fa) { + __xfs_buf_mark_corrupt(bp, fa); xfs_trans_brelse(context->tp, bp); + xfs_dirattr_mark_sick(dp, XFS_ATTR_FORK); bp = NULL; break; - case XFS_ATTR_LEAF_MAGIC: - case XFS_ATTR3_LEAF_MAGIC: - leaf = bp->b_addr; - xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, - &leafhdr, leaf); - entries = xfs_attr3_leaf_entryp(leaf); - if (cursor->hashval > be32_to_cpu( - entries[leafhdr.count - 1].hashval)) { - trace_xfs_attr_list_wrong_blk(context); - xfs_trans_brelse(context->tp, bp); - bp = NULL; - } else if (cursor->hashval <= be32_to_cpu( - entries[0].hashval)) { - trace_xfs_attr_list_wrong_blk(context); - xfs_trans_brelse(context->tp, bp); - bp = NULL; - } - break; - default: + } + xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, + &leafhdr, leaf); + entries = xfs_attr3_leaf_entryp(leaf); + if (cursor->hashval > be32_to_cpu( + entries[leafhdr.count - 1].hashval)) { + trace_xfs_attr_list_wrong_blk(context); + xfs_trans_brelse(context->tp, bp); + bp = NULL; + } else if (cursor->hashval <= be32_to_cpu( + entries[0].hashval)) { trace_xfs_attr_list_wrong_blk(context); xfs_trans_brelse(context->tp, bp); bp = NULL; } + break; + default: + trace_xfs_attr_list_wrong_blk(context); + xfs_trans_brelse(context->tp, bp); + bp = NULL; } } @@ -350,6 +395,7 @@ xfs_attr_node_list( * Note that start of node block is same as start of leaf block. */ if (bp == NULL) { +need_lookup: error = xfs_attr_node_list_lookup(context, cursor, &bp); if (error || !bp) return error; @@ -363,29 +409,32 @@ xfs_attr_node_list( */ for (;;) { leaf = bp->b_addr; - xfs_attr3_leaf_list_int(bp, context); + error = xfs_attr3_leaf_list_int(bp, context); + if (error) + break; xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &leafhdr, leaf); if (context->seen_enough || leafhdr.forw == 0) break; cursor->blkno = leafhdr.forw; xfs_trans_brelse(context->tp, bp); - error = xfs_attr3_leaf_read(context->tp, dp, cursor->blkno, -1, &bp); + error = xfs_attr3_leaf_read(context->tp, dp, dp->i_ino, + cursor->blkno, &bp); if (error) return error; } xfs_trans_brelse(context->tp, bp); - return 0; + return error; } /* * Copy out attribute list entries for attr_list(), for leaf attribute lists. */ -void +int xfs_attr3_leaf_list_int( struct xfs_buf *bp, struct xfs_attr_list_context *context) { - struct attrlist_cursor_kern *cursor; + struct xfs_attrlist_cursor_kern *cursor = &context->cursor; struct xfs_attr_leafblock *leaf; struct xfs_attr3_icleaf_hdr ichdr; struct xfs_attr_leaf_entry *entries; @@ -399,7 +448,6 @@ xfs_attr3_leaf_list_int( xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf); entries = xfs_attr3_leaf_entryp(leaf); - cursor = context->cursor; cursor->initted = 1; /* @@ -422,7 +470,7 @@ xfs_attr3_leaf_list_int( } if (i == ichdr.count) { trace_xfs_attr_list_notfound(context); - return; + return 0; } } else { entry = &entries[0]; @@ -435,6 +483,7 @@ xfs_attr3_leaf_list_int( */ for (; i < ichdr.count; entry++, i++) { char *name; + void *value; int namelen, valuelen; if (be32_to_cpu(entry->hashval) != cursor->hashval) { @@ -443,8 +492,8 @@ xfs_attr3_leaf_list_int( } if ((entry->flags & XFS_ATTR_INCOMPLETE) && - !(context->flags & ATTR_INCOMPLETE)) - continue; /* skip incomplete entries */ + !context->allow_incomplete) + continue; if (entry->flags & XFS_ATTR_LOCAL) { xfs_attr_leaf_name_local_t *name_loc; @@ -452,6 +501,7 @@ xfs_attr3_leaf_list_int( name_loc = xfs_attr3_leaf_name_local(leaf, i); name = name_loc->nameval; namelen = name_loc->namelen; + value = &name_loc->nameval[name_loc->namelen]; valuelen = be16_to_cpu(name_loc->valuelen); } else { xfs_attr_leaf_name_remote_t *name_rmt; @@ -459,197 +509,91 @@ xfs_attr3_leaf_list_int( name_rmt = xfs_attr3_leaf_name_remote(leaf, i); name = name_rmt->name; namelen = name_rmt->namelen; + value = NULL; valuelen = be32_to_cpu(name_rmt->valuelen); } + if (XFS_IS_CORRUPT(context->dp->i_mount, + !xfs_attr_namecheck(entry->flags, name, + namelen))) { + xfs_dirattr_mark_sick(context->dp, XFS_ATTR_FORK); + return -EFSCORRUPTED; + } context->put_listent(context, entry->flags, - name, namelen, valuelen); + name, namelen, value, valuelen); if (context->seen_enough) break; cursor->offset++; } trace_xfs_attr_list_leaf_end(context); - return; + return 0; } /* * Copy out attribute entries for attr_list(), for leaf attribute lists. */ STATIC int -xfs_attr_leaf_list(xfs_attr_list_context_t *context) +xfs_attr_leaf_list( + struct xfs_attr_list_context *context) { - int error; - struct xfs_buf *bp; + struct xfs_buf *bp; + int error; trace_xfs_attr_leaf_list(context); - context->cursor->blkno = 0; - error = xfs_attr3_leaf_read(context->tp, context->dp, 0, -1, &bp); + context->cursor.blkno = 0; + error = xfs_attr3_leaf_read(context->tp, context->dp, + context->dp->i_ino, 0, &bp); if (error) return error; - xfs_attr3_leaf_list_int(bp, context); + error = xfs_attr3_leaf_list_int(bp, context); xfs_trans_brelse(context->tp, bp); - return 0; + return error; } int -xfs_attr_list_int_ilocked( +xfs_attr_list_ilocked( struct xfs_attr_list_context *context) { struct xfs_inode *dp = context->dp; + int error; - ASSERT(xfs_isilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL)); + xfs_assert_ilocked(dp, XFS_ILOCK_SHARED | XFS_ILOCK_EXCL); /* * Decide on what work routines to call based on the inode size. */ if (!xfs_inode_hasattr(dp)) return 0; - else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) + if (dp->i_af.if_format == XFS_DINODE_FMT_LOCAL) return xfs_attr_shortform_list(context); - else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) + + /* Prerequisite for xfs_attr_is_leaf */ + error = xfs_iread_extents(NULL, dp, XFS_ATTR_FORK); + if (error) + return error; + + if (xfs_attr_is_leaf(dp)) return xfs_attr_leaf_list(context); return xfs_attr_node_list(context); } int -xfs_attr_list_int( - xfs_attr_list_context_t *context) +xfs_attr_list( + struct xfs_attr_list_context *context) { - int error; - xfs_inode_t *dp = context->dp; - uint lock_mode; + struct xfs_inode *dp = context->dp; + uint lock_mode; + int error; XFS_STATS_INC(dp->i_mount, xs_attr_list); - if (XFS_FORCED_SHUTDOWN(dp->i_mount)) + if (xfs_is_shutdown(dp->i_mount)) return -EIO; lock_mode = xfs_ilock_attr_map_shared(dp); - error = xfs_attr_list_int_ilocked(context); + error = xfs_attr_list_ilocked(context); xfs_iunlock(dp, lock_mode); return error; } - -#define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \ - (((struct attrlist_ent *) 0)->a_name - (char *) 0) -#define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \ - ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(uint32_t)-1) \ - & ~(sizeof(uint32_t)-1)) - -/* - * Format an attribute and copy it out to the user's buffer. - * Take care to check values and protect against them changing later, - * we may be reading them directly out of a user buffer. - */ -STATIC void -xfs_attr_put_listent( - xfs_attr_list_context_t *context, - int flags, - unsigned char *name, - int namelen, - int valuelen) -{ - struct attrlist *alist = (struct attrlist *)context->alist; - attrlist_ent_t *aep; - int arraytop; - - ASSERT(!(context->flags & ATTR_KERNOVAL)); - ASSERT(context->count >= 0); - ASSERT(context->count < (ATTR_MAX_VALUELEN/8)); - ASSERT(context->firstu >= sizeof(*alist)); - ASSERT(context->firstu <= context->bufsize); - - /* - * Only list entries in the right namespace. - */ - if (((context->flags & ATTR_SECURE) == 0) != - ((flags & XFS_ATTR_SECURE) == 0)) - return; - if (((context->flags & ATTR_ROOT) == 0) != - ((flags & XFS_ATTR_ROOT) == 0)) - return; - - arraytop = sizeof(*alist) + - context->count * sizeof(alist->al_offset[0]); - context->firstu -= ATTR_ENTSIZE(namelen); - if (context->firstu < arraytop) { - trace_xfs_attr_list_full(context); - alist->al_more = 1; - context->seen_enough = 1; - return; - } - - aep = (attrlist_ent_t *)&context->alist[context->firstu]; - aep->a_valuelen = valuelen; - memcpy(aep->a_name, name, namelen); - aep->a_name[namelen] = 0; - alist->al_offset[context->count++] = context->firstu; - alist->al_count = context->count; - trace_xfs_attr_list_add(context); - return; -} - -/* - * Generate a list of extended attribute names and optionally - * also value lengths. Positive return value follows the XFS - * convention of being an error, zero or negative return code - * is the length of the buffer returned (negated), indicating - * success. - */ -int -xfs_attr_list( - xfs_inode_t *dp, - char *buffer, - int bufsize, - int flags, - attrlist_cursor_kern_t *cursor) -{ - xfs_attr_list_context_t context; - struct attrlist *alist; - int error; - - /* - * Validate the cursor. - */ - if (cursor->pad1 || cursor->pad2) - return -EINVAL; - if ((cursor->initted == 0) && - (cursor->hashval || cursor->blkno || cursor->offset)) - return -EINVAL; - - /* Only internal consumers can retrieve incomplete attrs. */ - if (flags & ATTR_INCOMPLETE) - return -EINVAL; - - /* - * Check for a properly aligned buffer. - */ - if (((long)buffer) & (sizeof(int)-1)) - return -EFAULT; - if (flags & ATTR_KERNOVAL) - bufsize = 0; - - /* - * Initialize the output buffer. - */ - memset(&context, 0, sizeof(context)); - context.dp = dp; - context.cursor = cursor; - context.resynch = 1; - context.flags = flags; - context.alist = buffer; - context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */ - context.firstu = context.bufsize; - context.put_listent = xfs_attr_put_listent; - - alist = (struct attrlist *)context.alist; - alist->al_count = 0; - alist->al_more = 0; - alist->al_offset[0] = context.bufsize; - - error = xfs_attr_list_int(&context); - ASSERT(error <= 0); - return error; -} |