/* * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. * All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include "xfs.h" #include "xfs_fs.h" #include "xfs_types.h" #include "xfs_log.h" #include "xfs_inum.h" #include "xfs_trans.h" #include "xfs_sb.h" #include "xfs_dir.h" #include "xfs_dir2.h" #include "xfs_dmapi.h" #include "xfs_mount.h" #include "xfs_da_btree.h" #include "xfs_bmap_btree.h" #include "xfs_alloc_btree.h" #include "xfs_ialloc_btree.h" #include "xfs_alloc.h" #include "xfs_btree.h" #include "xfs_dir_sf.h" #include "xfs_dir2_sf.h" #include "xfs_attr_sf.h" #include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_bmap.h" #include "xfs_dir_leaf.h" #include "xfs_error.h" /* * xfs_dir.c * * Provide the external interfaces to manage directories. */ /*======================================================================== * Function prototypes for the kernel. *========================================================================*/ /* * Functions for the dirops interfaces. */ static void xfs_dir_mount(struct xfs_mount *mp); static int xfs_dir_isempty(struct xfs_inode *dp); static int xfs_dir_init(struct xfs_trans *trans, struct xfs_inode *dir, struct xfs_inode *parent_dir); static int xfs_dir_createname(struct xfs_trans *trans, struct xfs_inode *dp, char *name_string, int name_len, xfs_ino_t inode_number, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total); static int xfs_dir_lookup(struct xfs_trans *tp, struct xfs_inode *dp, char *name_string, int name_length, xfs_ino_t *inode_number); static int xfs_dir_removename(struct xfs_trans *trans, struct xfs_inode *dp, char *name_string, int name_length, xfs_ino_t ino, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total); static int xfs_dir_getdents(struct xfs_trans *tp, struct xfs_inode *dp, struct uio *uiop, int *eofp); static int xfs_dir_replace(struct xfs_trans *tp, struct xfs_inode *dp, char *name_string, int name_length, xfs_ino_t inode_number, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total); static int xfs_dir_canenter(struct xfs_trans *tp, struct xfs_inode *dp, char *name_string, int name_length); static int xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp, xfs_dinode_t *dip); xfs_dirops_t xfsv1_dirops = { .xd_mount = xfs_dir_mount, .xd_isempty = xfs_dir_isempty, .xd_init = xfs_dir_init, .xd_createname = xfs_dir_createname, .xd_lookup = xfs_dir_lookup, .xd_removename = xfs_dir_removename, .xd_getdents = xfs_dir_getdents, .xd_replace = xfs_dir_replace, .xd_canenter = xfs_dir_canenter, .xd_shortform_validate_ondisk = xfs_dir_shortform_validate_ondisk, .xd_shortform_to_single = xfs_dir_shortform_to_leaf, }; /* * Internal routines when dirsize == XFS_LBSIZE(mp). */ STATIC int xfs_dir_leaf_lookup(xfs_da_args_t *args); STATIC int xfs_dir_leaf_removename(xfs_da_args_t *args, int *number_entries, int *total_namebytes); STATIC int xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put); STATIC int xfs_dir_leaf_replace(xfs_da_args_t *args); /* * Internal routines when dirsize > XFS_LBSIZE(mp). */ STATIC int xfs_dir_node_addname(xfs_da_args_t *args); STATIC int xfs_dir_node_lookup(xfs_da_args_t *args); STATIC int xfs_dir_node_removename(xfs_da_args_t *args); STATIC int xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put); STATIC int xfs_dir_node_replace(xfs_da_args_t *args); #if defined(XFS_DIR_TRACE) ktrace_t *xfs_dir_trace_buf; #endif /*======================================================================== * Overall external interface routines. *========================================================================*/ xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot; /* * One-time startup routine called from xfs_init(). */ void xfs_dir_startup(void) { xfs_dir_hash_dot = xfs_da_hashname(".", 1); xfs_dir_hash_dotdot = xfs_da_hashname("..", 2); } /* * Initialize directory-related fields in the mount structure. */ static void xfs_dir_mount(xfs_mount_t *mp) { uint shortcount, leafcount, count; mp->m_dirversion = 1; if (!(mp->m_flags & XFS_MOUNT_ATTR2)) { shortcount = (mp->m_attroffset - (uint)sizeof(xfs_dir_sf_hdr_t)) / (uint)sizeof(xfs_dir_sf_entry_t); leafcount = (XFS_LBSIZE(mp) - (uint)sizeof(xfs_dir_leaf_hdr_t)) / ((uint)sizeof(xfs_dir_leaf_entry_t) + (uint)sizeof(xfs_dir_leaf_name_t)); } else { shortcount = (XFS_BMDR_SPACE_CALC(MINABTPTRS) - (uint)sizeof(xfs_dir_sf_hdr_t)) / (uint)sizeof(xfs_dir_sf_entry_t); leafcount = (XFS_LBSIZE(mp) - (uint)sizeof(xfs_dir_leaf_hdr_t)) / ((uint)sizeof(xfs_dir_leaf_entry_t) + (uint)sizeof(xfs_dir_leaf_name_t)); } count = shortcount > leafcount ? shortcount : leafcount; mp->m_dircook_elog = xfs_da_log2_roundup(count + 1); ASSERT(mp->m_dircook_elog <= mp->m_sb.sb_blocklog); mp->m_dir_node_ents = mp->m_attr_node_ents = (XFS_LBSIZE(mp) - (uint)sizeof(xfs_da_node_hdr_t)) / (uint)sizeof(xfs_da_node_entry_t); mp->m_dir_magicpct = (XFS_LBSIZE(mp) * 37) / 100; mp->m_dirblksize = mp->m_sb.sb_blocksize; mp->m_dirblkfsbs = 1; } /* * Return 1 if directory contains only "." and "..". */ static int xfs_dir_isempty(xfs_inode_t *dp) { xfs_dir_sf_hdr_t *hdr; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); if (dp->i_d.di_size == 0) return(1); if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) return(0); hdr = (xfs_dir_sf_hdr_t *)dp->i_df.if_u1.if_data; return(hdr->count == 0); } /* * Initialize a directory with its "." and ".." entries. */ static int xfs_dir_init(xfs_trans_t *trans, xfs_inode_t *dir, xfs_inode_t *parent_dir) { xfs_da_args_t args; int error; memset((char *)&args, 0, sizeof(args)); args.dp = dir; args.trans = trans; ASSERT((dir->i_d.di_mode & S_IFMT) == S_IFDIR); if ((error = xfs_dir_ino_validate(trans->t_mountp, parent_dir->i_ino))) return error; return(xfs_dir_shortform_create(&args, parent_dir->i_ino)); } /* * Generic handler routine to add a name to a directory. * Transitions directory from shortform to Btree as necessary. */ static int /* error */ xfs_dir_createname(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, xfs_ino_t inum, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total) { xfs_da_args_t args; int retval, newsize, done; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum))) return (retval); XFS_STATS_INC(xs_dir_create); /* * Fill in the arg structure for this request. */ args.name = name; args.namelen = namelen; args.hashval = xfs_da_hashname(name, namelen); args.inumber = inum; args.dp = dp; args.firstblock = firstblock; args.flist = flist; args.total = total; args.whichfork = XFS_DATA_FORK; args.trans = trans; args.justcheck = 0; args.addname = args.oknoent = 1; /* * Decide on what work routines to call based on the inode size. */ done = 0; if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen); if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp)) { retval = xfs_dir_shortform_addname(&args); done = 1; } else { if (total == 0) return XFS_ERROR(ENOSPC); retval = xfs_dir_shortform_to_leaf(&args); done = retval != 0; } } if (!done && xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_addname(&args); done = retval != ENOSPC; if (!done) { if (total == 0) return XFS_ERROR(ENOSPC); retval = xfs_dir_leaf_to_node(&args); done = retval != 0; } } if (!done) { retval = xfs_dir_node_addname(&args); } return(retval); } /* * Generic handler routine to check if a name can be added to a directory, * without adding any blocks to the directory. */ static int /* error */ xfs_dir_canenter(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen) { xfs_da_args_t args; int retval, newsize; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); /* * Fill in the arg structure for this request. */ args.name = name; args.namelen = namelen; args.hashval = xfs_da_hashname(name, namelen); args.inumber = 0; args.dp = dp; args.firstblock = NULL; args.flist = NULL; args.total = 0; args.whichfork = XFS_DATA_FORK; args.trans = trans; args.justcheck = args.addname = args.oknoent = 1; /* * Decide on what work routines to call based on the inode size. */ if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { newsize = XFS_DIR_SF_ENTSIZE_BYNAME(args.namelen); if ((dp->i_d.di_size + newsize) <= XFS_IFORK_DSIZE(dp)) retval = 0; else retval = XFS_ERROR(ENOSPC); } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_addname(&args); } else { retval = xfs_dir_node_addname(&args); } return(retval); } /* * Generic handler routine to remove a name from a directory. * Transitions directory from Btree to shortform as necessary. */ static int /* error */ xfs_dir_removename(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, xfs_ino_t ino, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total) { xfs_da_args_t args; int count, totallen, newsize, retval; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); XFS_STATS_INC(xs_dir_remove); /* * Fill in the arg structure for this request. */ args.name = name; args.namelen = namelen; args.hashval = xfs_da_hashname(name, namelen); args.inumber = ino; args.dp = dp; args.firstblock = firstblock; args.flist = flist; args.total = total; args.whichfork = XFS_DATA_FORK; args.trans = trans; args.justcheck = args.addname = args.oknoent = 0; /* * Decide on what work routines to call based on the inode size. */ if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { retval = xfs_dir_shortform_removename(&args); } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_removename(&args, &count, &totallen); if (retval == 0) { newsize = XFS_DIR_SF_ALLFIT(count, totallen); if (newsize <= XFS_IFORK_DSIZE(dp)) { retval = xfs_dir_leaf_to_shortform(&args); } } } else { retval = xfs_dir_node_removename(&args); } return(retval); } static int /* error */ xfs_dir_lookup(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, xfs_ino_t *inum) { xfs_da_args_t args; int retval; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); XFS_STATS_INC(xs_dir_lookup); /* * Fill in the arg structure for this request. */ args.name = name; args.namelen = namelen; args.hashval = xfs_da_hashname(name, namelen); args.inumber = 0; args.dp = dp; args.firstblock = NULL; args.flist = NULL; args.total = 0; args.whichfork = XFS_DATA_FORK; args.trans = trans; args.justcheck = args.addname = 0; args.oknoent = 1; /* * Decide on what work routines to call based on the inode size. */ if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { retval = xfs_dir_shortform_lookup(&args); } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_lookup(&args); } else { retval = xfs_dir_node_lookup(&args); } if (retval == EEXIST) retval = 0; *inum = args.inumber; return(retval); } /* * Implement readdir. */ static int /* error */ xfs_dir_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp) { xfs_dirent_t *dbp; int alignment, retval; xfs_dir_put_t put; XFS_STATS_INC(xs_dir_getdents); ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); /* * If our caller has given us a single contiguous memory buffer, * just work directly within that buffer. If it's in user memory, * lock it down first. */ alignment = sizeof(xfs_off_t) - 1; if ((uio->uio_iovcnt == 1) && (((__psint_t)uio->uio_iov[0].iov_base & alignment) == 0) && ((uio->uio_iov[0].iov_len & alignment) == 0)) { dbp = NULL; put = xfs_dir_put_dirent64_direct; } else { dbp = kmem_alloc(sizeof(*dbp) + MAXNAMELEN, KM_SLEEP); put = xfs_dir_put_dirent64_uio; } /* * Decide on what work routines to call based on the inode size. */ *eofp = 0; if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { retval = xfs_dir_shortform_getdents(dp, uio, eofp, dbp, put); } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_getdents(trans, dp, uio, eofp, dbp, put); } else { retval = xfs_dir_node_getdents(trans, dp, uio, eofp, dbp, put); } if (dbp != NULL) kmem_free(dbp, sizeof(*dbp) + MAXNAMELEN); return(retval); } static int /* error */ xfs_dir_replace(xfs_trans_t *trans, xfs_inode_t *dp, char *name, int namelen, xfs_ino_t inum, xfs_fsblock_t *firstblock, xfs_bmap_free_t *flist, xfs_extlen_t total) { xfs_da_args_t args; int retval; ASSERT((dp->i_d.di_mode & S_IFMT) == S_IFDIR); if ((retval = xfs_dir_ino_validate(trans->t_mountp, inum))) return retval; /* * Fill in the arg structure for this request. */ args.name = name; args.namelen = namelen; args.hashval = xfs_da_hashname(name, namelen); args.inumber = inum; args.dp = dp; args.firstblock = firstblock; args.flist = flist; args.total = total; args.whichfork = XFS_DATA_FORK; args.trans = trans; args.justcheck = args.addname = args.oknoent = 0; /* * Decide on what work routines to call based on the inode size. */ if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { retval = xfs_dir_shortform_replace(&args); } else if (xfs_bmap_one_block(dp, XFS_DATA_FORK)) { retval = xfs_dir_leaf_replace(&args); } else { retval = xfs_dir_node_replace(&args); } return(retval); } static int xfs_dir_shortform_validate_ondisk(xfs_mount_t *mp, xfs_dinode_t *dp) { xfs_ino_t ino; int namelen_sum; int count; xfs_dir_shortform_t *sf; xfs_dir_sf_entry_t *sfe; int i; if ((INT_GET(dp->di_core.di_mode, ARCH_CONVERT) & S_IFMT) != S_IFDIR) { return 0; } if (INT_GET(dp->di_core.di_format, ARCH_CONVERT) != XFS_DINODE_FMT_LOCAL) { return 0; } if (INT_GET(dp->di_core.di_size, ARCH_CONVERT) < sizeof(sf->hdr)) { xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform size: dp 0x%p", dp); return 1; } sf = (xfs_dir_shortform_t *)(&dp->di_u.di_dirsf); ino = XFS_GET_DIR_INO8(sf->hdr.parent); if (xfs_dir_ino_validate(mp, ino)) return 1; count = sf->hdr.count; if ((count < 0) || ((count * 10) > XFS_LITINO(mp))) { xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform count: dp 0x%p", dp); return(1); } if (count == 0) { return 0; } namelen_sum = 0; sfe = &sf->list[0]; for (i = sf->hdr.count - 1; i >= 0; i--) { ino = XFS_GET_DIR_INO8(sfe->inumber); xfs_dir_ino_validate(mp, ino); if (sfe->namelen >= XFS_LITINO(mp)) { xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform namelen: dp 0x%p", dp); return 1; } namelen_sum += sfe->namelen; sfe = XFS_DIR_SF_NEXTENTRY(sfe); } if (namelen_sum >= XFS_LITINO(mp)) { xfs_fs_cmn_err(CE_WARN, mp, "Invalid shortform namelen: dp 0x%p", dp); return 1; } return 0; } /*======================================================================== * External routines when dirsize == XFS_LBSIZE(dp->i_mount). *========================================================================*/ /* * Add a name to the leaf directory structure * This is the external routine. */ int xfs_dir_leaf_addname(xfs_da_args_t *args) { int index, retval; xfs_dabuf_t *bp; retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, XFS_DATA_FORK); if (retval) return(retval); ASSERT(bp != NULL); retval = xfs_dir_leaf_lookup_int(bp, args, &index); if (retval == ENOENT) retval = xfs_dir_leaf_add(bp, args, index); xfs_da_buf_done(bp); return(retval); } /* * Remove a name from the leaf directory structure * This is the external routine. */ STATIC int xfs_dir_leaf_removename(xfs_da_args_t *args, int *count, int *totallen) { xfs_dir_leafblock_t *leaf; int index, retval; xfs_dabuf_t *bp; retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, XFS_DATA_FORK); if (retval) return(retval); ASSERT(bp != NULL); leaf = bp->data; ASSERT(be16_to_cpu(leaf->hdr.info.magic) == XFS_DIR_LEAF_MAGIC); retval = xfs_dir_leaf_lookup_int(bp, args, &index); if (retval == EEXIST) { (void)xfs_dir_leaf_remove(args->trans, bp, index); *count = INT_GET(leaf->hdr.count, ARCH_CONVERT); *totallen = INT_GET(leaf->hdr.namebytes, ARCH_CONVERT); retval = 0; } xfs_da_buf_done(bp); return(retval); } /* * Look up a name in a leaf directory structure. * This is the external routine. */ STATIC int xfs_dir_leaf_lookup(xfs_da_args_t *args) { int index, retval; xfs_dabuf_t *bp; retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, XFS_DATA_FORK); if (retval) return(retval); ASSERT(bp != NULL); retval = xfs_dir_leaf_lookup_int(bp, args, &index); xfs_da_brelse(args->trans, bp); return(retval); } /* * Copy out directory entries for getdents(), for leaf directories. */ STATIC int xfs_dir_leaf_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put) { xfs_dabuf_t *bp; int retval, eob; retval = xfs_da_read_buf(dp->i_transp, dp, 0, -1, &bp, XFS_DATA_FORK); if (retval) return(retval); ASSERT(bp != NULL); retval = xfs_dir_leaf_getdents_int(bp, dp, 0, uio, &eob, dbp, put, -1); xfs_da_brelse(trans, bp); *eofp = (eob == 0); return(retval); } /* * Look up a name in a leaf directory structure, replace the inode number. * This is the external routine. */ STATIC int xfs_dir_leaf_replace(xfs_da_args_t *args) { int index, retval; xfs_dabuf_t *bp; xfs_ino_t inum; xfs_dir_leafblock_t *leaf; xfs_dir_leaf_entry_t *entry; xfs_dir_leaf_name_t *namest; inum = args->inumber; retval = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp, XFS_DATA_FORK); if (retval) return(retval); ASSERT(bp != NULL); retval = xfs_dir_leaf_lookup_int(bp, args, &index); if (retval == EEXIST) { leaf = bp->data; entry = &leaf->entries[index]; namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT)); /* XXX - replace assert? */ XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber); xfs_da_log_buf(args->trans, bp, XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber))); xfs_da_buf_done(bp); retval = 0; } else xfs_da_brelse(args->trans, bp); return(retval); } /*======================================================================== * External routines when dirsize > XFS_LBSIZE(mp). *========================================================================*/ /* * Add a name to a Btree-format directory. * * This will involve walking down the Btree, and may involve splitting * leaf nodes and even splitting intermediate nodes up to and including * the root node (a special case of an intermediate node). */ STATIC int xfs_dir_node_addname(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; int retval, error; /* * Fill in bucket of arguments/results/context to carry around. */ state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_dir_node_ents; /* * Search to see if name already exists, and get back a pointer * to where it should go. */ error = xfs_da_node_lookup_int(state, &retval); if (error) retval = error; if (retval != ENOENT) goto error; blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); retval = xfs_dir_leaf_add(blk->bp, args, blk->index); if (retval == 0) { /* * Addition succeeded, update Btree hashvals. */ if (!args->justcheck) xfs_da_fixhashpath(state, &state->path); } else { /* * Addition failed, split as many Btree elements as required. */ if (args->total == 0) { ASSERT(retval == ENOSPC); goto error; } retval = xfs_da_split(state); } error: xfs_da_state_free(state); return(retval); } /* * Remove a name from a B-tree directory. * * This will involve walking down the Btree, and may involve joining * leaf nodes and even joining intermediate nodes up to and including * the root node (a special case of an intermediate node). */ STATIC int xfs_dir_node_removename(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; int retval, error; state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_dir_node_ents; /* * Search to see if name exists, and get back a pointer to it. */ error = xfs_da_node_lookup_int(state, &retval); if (error) retval = error; if (retval != EEXIST) { xfs_da_state_free(state); return(retval); } /* * Remove the name and update the hashvals in the tree. */ blk = &state->path.blk[ state->path.active-1 ]; ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); retval = xfs_dir_leaf_remove(args->trans, blk->bp, blk->index); xfs_da_fixhashpath(state, &state->path); /* * Check to see if the tree needs to be collapsed. */ error = 0; if (retval) { error = xfs_da_join(state); } xfs_da_state_free(state); if (error) return(error); return(0); } /* * Look up a filename in a int directory. * Use an internal routine to actually do all the work. */ STATIC int xfs_dir_node_lookup(xfs_da_args_t *args) { xfs_da_state_t *state; int retval, error, i; state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_dir_node_ents; /* * Search to see if name exists, * and get back a pointer to it. */ error = xfs_da_node_lookup_int(state, &retval); if (error) { retval = error; } /* * If not in a transaction, we have to release all the buffers. */ for (i = 0; i < state->path.active; i++) { xfs_da_brelse(args->trans, state->path.blk[i].bp); state->path.blk[i].bp = NULL; } xfs_da_state_free(state); return(retval); } STATIC int xfs_dir_node_getdents(xfs_trans_t *trans, xfs_inode_t *dp, uio_t *uio, int *eofp, xfs_dirent_t *dbp, xfs_dir_put_t put) { xfs_da_intnode_t *node; xfs_da_node_entry_t *btree; xfs_dir_leafblock_t *leaf = NULL; xfs_dablk_t bno, nextbno; xfs_dahash_t cookhash; xfs_mount_t *mp; int error, eob, i; xfs_dabuf_t *bp; xfs_daddr_t nextda; /* * Pick up our context. */ mp = dp->i_mount; bp = NULL; bno = XFS_DA_COOKIE_BNO(mp, uio->uio_offset); cookhash = XFS_DA_COOKIE_HASH(mp, uio->uio_offset); xfs_dir_trace_g_du("node: start", dp, uio); /* * Re-find our place, even if we're confused about what our place is. * * First we check the block number from the magic cookie, it is a * cache of where we ended last time. If we find a leaf block, and * the starting hashval in that block is less than our desired * hashval, then we run with it. */ if (bno > 0) { error = xfs_da_read_buf(trans, dp, bno, -2, &bp, XFS_DATA_FORK); if ((error != 0) && (error != EFSCORRUPTED)) return(error); if (bp) leaf = bp->data; if (bp && be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR_LEAF_MAGIC) { xfs_dir_trace_g_dub("node: block not a leaf", dp, uio, bno); xfs_da_brelse(trans, bp); bp = NULL; } if (bp && INT_GET(leaf->entries[0].hashval, ARCH_CONVERT) > cookhash) { xfs_dir_trace_g_dub("node: leaf hash too large", dp, uio, bno); xfs_da_brelse(trans, bp); bp = NULL; } if (bp && cookhash > INT_GET(leaf->entries[INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1].hashval, ARCH_CONVERT)) { xfs_dir_trace_g_dub("node: leaf hash too small", dp, uio, bno); xfs_da_brelse(trans, bp); bp = NULL; } } /* * If we did not find a leaf block from the blockno in the cookie, * or we there was no blockno in the cookie (eg: first time thru), * the we start at the top of the Btree and re-find our hashval. */ if (bp == NULL) { xfs_dir_trace_g_du("node: start at root" , dp, uio); bno = 0; for (;;) { error = xfs_da_read_buf(trans, dp, bno, -1, &bp, XFS_DATA_FORK); if (error) return(error); if (bp == NULL) return(XFS_ERROR(EFSCORRUPTED)); node = bp->data; if (be16_to_cpu(node->hdr.info.magic) != XFS_DA_NODE_MAGIC) break; btree = &node->btree[0]; xfs_dir_trace_g_dun("node: node detail", dp, uio, node); for (i = 0; i < INT_GET(node->hdr.count, ARCH_CONVERT); btree++, i++) { if (be32_to_cpu(btree->hashval) >= cookhash) { bno = be32_to_cpu(btree->before); break; } } if (i == INT_GET(node->hdr.count, ARCH_CONVERT)) { xfs_da_brelse(trans, bp); xfs_dir_trace_g_du("node: hash beyond EOF", dp, uio); uio->uio_offset = XFS_DA_MAKE_COOKIE(mp, 0, 0, XFS_DA_MAXHASH); *eofp = 1; return(0); } xfs_dir_trace_g_dub("node: going to block", dp, uio, bno); xfs_da_brelse(trans, bp); } } ASSERT(cookhash != XFS_DA_MAXHASH); /* * We've dropped down to the (first) leaf block that contains the * hashval we are interested in. Continue rolling upward thru the * leaf blocks until we fill up our buffer. */ for (;;) { leaf = bp->data; if (unlikely(be16_to_cpu(leaf->hdr.info.magic) != XFS_DIR_LEAF_MAGIC)) { xfs_dir_trace_g_dul("node: not a leaf", dp, uio, leaf); xfs_da_brelse(trans, bp); XFS_CORRUPTION_ERROR("xfs_dir_node_getdents(1)", XFS_ERRLEVEL_LOW, mp, leaf); return XFS_ERROR(EFSCORRUPTED); } xfs_dir_trace_g_dul("node: leaf detail", dp, uio, leaf); if ((nextbno = be32_to_cpu(leaf->hdr.info.forw))) { nextda = xfs_da_reada_buf(trans, dp, nextbno, XFS_DATA_FORK); } else nextda = -1; error = xfs_dir_leaf_getdents_int(bp, dp, bno, uio, &eob, dbp, put, nextda); xfs_da_brelse(trans, bp); bno = nextbno; if (eob) { xfs_dir_trace_g_dub("node: E-O-B", dp, uio, bno); *eofp = 0; return(error); } if (bno == 0) break; error = xfs_da_read_buf(trans, dp, bno, nextda, &bp, XFS_DATA_FORK); if (error) return(error); if (unlikely(bp == NULL)) { XFS_ERROR_REPORT("xfs_dir_node_getdents(2)", XFS_ERRLEVEL_LOW, mp); return(XFS_ERROR(EFSCORRUPTED)); } } *eofp = 1; xfs_dir_trace_g_du("node: E-O-F", dp, uio); return(0); } /* * Look up a filename in an int directory, replace the inode number. * Use an internal routine to actually do the lookup. */ STATIC int xfs_dir_node_replace(xfs_da_args_t *args) { xfs_da_state_t *state; xfs_da_state_blk_t *blk; xfs_dir_leafblock_t *leaf; xfs_dir_leaf_entry_t *entry; xfs_dir_leaf_name_t *namest; xfs_ino_t inum; int retval, error, i; xfs_dabuf_t *bp; state = xfs_da_state_alloc(); state->args = args; state->mp = args->dp->i_mount; state->blocksize = state->mp->m_sb.sb_blocksize; state->node_ents = state->mp->m_dir_node_ents; inum = args->inumber; /* * Search to see if name exists, * and get back a pointer to it. */ error = xfs_da_node_lookup_int(state, &retval); if (error) { retval = error; } if (retval == EEXIST) { blk = &state->path.blk[state->path.active - 1]; ASSERT(blk->magic == XFS_DIR_LEAF_MAGIC); bp = blk->bp; leaf = bp->data; entry = &leaf->entries[blk->index]; namest = XFS_DIR_LEAF_NAMESTRUCT(leaf, INT_GET(entry->nameidx, ARCH_CONVERT)); /* XXX - replace assert ? */ XFS_DIR_SF_PUT_DIRINO(&inum, &namest->inumber); xfs_da_log_buf(args->trans, bp, XFS_DA_LOGRANGE(leaf, namest, sizeof(namest->inumber))); xfs_da_buf_done(bp); blk->bp = NULL; retval = 0; } else { i = state->path.active - 1; xfs_da_brelse(args->trans, state->path.blk[i].bp); state->path.blk[i].bp = NULL; } for (i = 0; i < state->path.active - 1; i++) { xfs_da_brelse(args->trans, state->path.blk[i].bp); state->path.blk[i].bp = NULL; } xfs_da_state_free(state); return(retval); } #if defined(XFS_DIR_TRACE) /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_du(char *where, xfs_inode_t *dp, uio_t *uio) { xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DU, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, NULL, NULL, NULL, NULL, NULL, NULL, NULL); } /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_dub(char *where, xfs_inode_t *dp, uio_t *uio, xfs_dablk_t bno) { xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUB, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, (void *)(unsigned long)bno, NULL, NULL, NULL, NULL, NULL, NULL); } /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_dun(char *where, xfs_inode_t *dp, uio_t *uio, xfs_da_intnode_t *node) { int last = INT_GET(node->hdr.count, ARCH_CONVERT) - 1; xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUN, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, (void *)(unsigned long)be32_to_cpu(node->hdr.info.forw), (void *)(unsigned long) INT_GET(node->hdr.count, ARCH_CONVERT), (void *)(unsigned long) be32_to_cpu(node->btree[0].hashval), (void *)(unsigned long) be32_to_cpu(node->btree[last].hashval), NULL, NULL, NULL); } /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_dul(char *where, xfs_inode_t *dp, uio_t *uio, xfs_dir_leafblock_t *leaf) { int last = INT_GET(leaf->hdr.count, ARCH_CONVERT) - 1; xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUL, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, (void *)(unsigned long)be32_to_cpu(leaf->hdr.info.forw), (void *)(unsigned long) INT_GET(leaf->hdr.count, ARCH_CONVERT), (void *)(unsigned long) INT_GET(leaf->entries[0].hashval, ARCH_CONVERT), (void *)(unsigned long) INT_GET(leaf->entries[last].hashval, ARCH_CONVERT), NULL, NULL, NULL); } /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_due(char *where, xfs_inode_t *dp, uio_t *uio, xfs_dir_leaf_entry_t *entry) { xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUE, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, (void *)(unsigned long) INT_GET(entry->hashval, ARCH_CONVERT), NULL, NULL, NULL, NULL, NULL, NULL); } /* * Add a trace buffer entry for an inode and a uio. */ void xfs_dir_trace_g_duc(char *where, xfs_inode_t *dp, uio_t *uio, xfs_off_t cookie) { xfs_dir_trace_enter(XFS_DIR_KTRACE_G_DUC, where, (void *)dp, (void *)dp->i_mount, (void *)((unsigned long)(uio->uio_offset >> 32)), (void *)((unsigned long)(uio->uio_offset & 0xFFFFFFFF)), (void *)(unsigned long)uio->uio_resid, (void *)((unsigned long)(cookie >> 32)), (void *)((unsigned long)(cookie & 0xFFFFFFFF)), NULL, NULL, NULL, NULL, NULL); } /* * Add a trace buffer entry for the arguments given to the routine, * generic form. */ void xfs_dir_trace_enter(int type, char *where, void * a0, void * a1, void * a2, void * a3, void * a4, void * a5, void * a6, void * a7, void * a8, void * a9, void * a10, void * a11) { ASSERT(xfs_dir_trace_buf); ktrace_enter(xfs_dir_trace_buf, (void *)(unsigned long)type, (void *)where, (void *)a0, (void *)a1, (void *)a2, (void *)a3, (void *)a4, (void *)a5, (void *)a6, (void *)a7, (void *)a8, (void *)a9, (void *)a10, (void *)a11, NULL, NULL); } #endif /* XFS_DIR_TRACE */