10b61f8a4SDave Chinner // SPDX-License-Identifier: GPL-2.0 230f712c9SDave Chinner /* 330f712c9SDave Chinner * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. 430f712c9SDave Chinner * All Rights Reserved. 530f712c9SDave Chinner */ 630f712c9SDave Chinner #include "xfs.h" 730f712c9SDave Chinner #include "xfs_fs.h" 830f712c9SDave Chinner #include "xfs_format.h" 930f712c9SDave Chinner #include "xfs_log_format.h" 1030f712c9SDave Chinner #include "xfs_trans_resv.h" 1130f712c9SDave Chinner #include "xfs_mount.h" 123ab78df2SDarrick J. Wong #include "xfs_defer.h" 1330f712c9SDave Chinner #include "xfs_da_format.h" 1430f712c9SDave Chinner #include "xfs_da_btree.h" 1530f712c9SDave Chinner #include "xfs_inode.h" 1630f712c9SDave Chinner #include "xfs_trans.h" 1730f712c9SDave Chinner #include "xfs_inode_item.h" 1830f712c9SDave Chinner #include "xfs_bmap.h" 1930f712c9SDave Chinner #include "xfs_dir2.h" 2030f712c9SDave Chinner #include "xfs_dir2_priv.h" 2191fb9afcSDarrick J. Wong #include "xfs_ialloc.h" 22e9e899a2SDarrick J. Wong #include "xfs_errortag.h" 2330f712c9SDave Chinner #include "xfs_error.h" 2430f712c9SDave Chinner #include "xfs_trace.h" 2530f712c9SDave Chinner 2630f712c9SDave Chinner struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; 2730f712c9SDave Chinner 281b767ee3SDave Chinner /* 291fc4d33fSAmir Goldstein * Convert inode mode to directory entry filetype 301b767ee3SDave Chinner */ 31a5c46e5eSDarrick J. Wong unsigned char 32a5c46e5eSDarrick J. Wong xfs_mode_to_ftype( 33a5c46e5eSDarrick J. Wong int mode) 341fc4d33fSAmir Goldstein { 351fc4d33fSAmir Goldstein switch (mode & S_IFMT) { 361fc4d33fSAmir Goldstein case S_IFREG: 371fc4d33fSAmir Goldstein return XFS_DIR3_FT_REG_FILE; 381fc4d33fSAmir Goldstein case S_IFDIR: 391fc4d33fSAmir Goldstein return XFS_DIR3_FT_DIR; 401fc4d33fSAmir Goldstein case S_IFCHR: 411fc4d33fSAmir Goldstein return XFS_DIR3_FT_CHRDEV; 421fc4d33fSAmir Goldstein case S_IFBLK: 431fc4d33fSAmir Goldstein return XFS_DIR3_FT_BLKDEV; 441fc4d33fSAmir Goldstein case S_IFIFO: 451fc4d33fSAmir Goldstein return XFS_DIR3_FT_FIFO; 461fc4d33fSAmir Goldstein case S_IFSOCK: 471fc4d33fSAmir Goldstein return XFS_DIR3_FT_SOCK; 481fc4d33fSAmir Goldstein case S_IFLNK: 491fc4d33fSAmir Goldstein return XFS_DIR3_FT_SYMLINK; 501fc4d33fSAmir Goldstein default: 511fc4d33fSAmir Goldstein return XFS_DIR3_FT_UNKNOWN; 521fc4d33fSAmir Goldstein } 531fc4d33fSAmir Goldstein } 5430f712c9SDave Chinner 5530f712c9SDave Chinner /* 5630f712c9SDave Chinner * ASCII case-insensitive (ie. A-Z) support for directories that was 5730f712c9SDave Chinner * used in IRIX. 5830f712c9SDave Chinner */ 5930f712c9SDave Chinner STATIC xfs_dahash_t 6030f712c9SDave Chinner xfs_ascii_ci_hashname( 6130f712c9SDave Chinner struct xfs_name *name) 6230f712c9SDave Chinner { 6330f712c9SDave Chinner xfs_dahash_t hash; 6430f712c9SDave Chinner int i; 6530f712c9SDave Chinner 6630f712c9SDave Chinner for (i = 0, hash = 0; i < name->len; i++) 6730f712c9SDave Chinner hash = tolower(name->name[i]) ^ rol32(hash, 7); 6830f712c9SDave Chinner 6930f712c9SDave Chinner return hash; 7030f712c9SDave Chinner } 7130f712c9SDave Chinner 7230f712c9SDave Chinner STATIC enum xfs_dacmp 7330f712c9SDave Chinner xfs_ascii_ci_compname( 7430f712c9SDave Chinner struct xfs_da_args *args, 7530f712c9SDave Chinner const unsigned char *name, 7630f712c9SDave Chinner int len) 7730f712c9SDave Chinner { 7830f712c9SDave Chinner enum xfs_dacmp result; 7930f712c9SDave Chinner int i; 8030f712c9SDave Chinner 8130f712c9SDave Chinner if (args->namelen != len) 8230f712c9SDave Chinner return XFS_CMP_DIFFERENT; 8330f712c9SDave Chinner 8430f712c9SDave Chinner result = XFS_CMP_EXACT; 8530f712c9SDave Chinner for (i = 0; i < len; i++) { 8630f712c9SDave Chinner if (args->name[i] == name[i]) 8730f712c9SDave Chinner continue; 8830f712c9SDave Chinner if (tolower(args->name[i]) != tolower(name[i])) 8930f712c9SDave Chinner return XFS_CMP_DIFFERENT; 9030f712c9SDave Chinner result = XFS_CMP_CASE; 9130f712c9SDave Chinner } 9230f712c9SDave Chinner 9330f712c9SDave Chinner return result; 9430f712c9SDave Chinner } 9530f712c9SDave Chinner 96cf7841c1SBhumika Goyal static const struct xfs_nameops xfs_ascii_ci_nameops = { 9730f712c9SDave Chinner .hashname = xfs_ascii_ci_hashname, 9830f712c9SDave Chinner .compname = xfs_ascii_ci_compname, 9930f712c9SDave Chinner }; 10030f712c9SDave Chinner 10130f712c9SDave Chinner int 10230f712c9SDave Chinner xfs_da_mount( 10330f712c9SDave Chinner struct xfs_mount *mp) 10430f712c9SDave Chinner { 10530f712c9SDave Chinner struct xfs_da_geometry *dageo; 10630f712c9SDave Chinner int nodehdr_size; 10730f712c9SDave Chinner 10830f712c9SDave Chinner 10930f712c9SDave Chinner ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); 110ac503a4cSDarrick J. Wong ASSERT(xfs_dir2_dirblock_bytes(&mp->m_sb) <= XFS_MAX_BLOCKSIZE); 11130f712c9SDave Chinner 11230f712c9SDave Chinner mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); 11330f712c9SDave Chinner mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); 11430f712c9SDave Chinner 11530f712c9SDave Chinner nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; 11630f712c9SDave Chinner mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), 11730f712c9SDave Chinner KM_SLEEP | KM_MAYFAIL); 11830f712c9SDave Chinner mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), 11930f712c9SDave Chinner KM_SLEEP | KM_MAYFAIL); 12030f712c9SDave Chinner if (!mp->m_dir_geo || !mp->m_attr_geo) { 12130f712c9SDave Chinner kmem_free(mp->m_dir_geo); 12230f712c9SDave Chinner kmem_free(mp->m_attr_geo); 1232451337dSDave Chinner return -ENOMEM; 12430f712c9SDave Chinner } 12530f712c9SDave Chinner 12630f712c9SDave Chinner /* set up directory geometry */ 12730f712c9SDave Chinner dageo = mp->m_dir_geo; 12830f712c9SDave Chinner dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; 12930f712c9SDave Chinner dageo->fsblog = mp->m_sb.sb_blocklog; 130ac503a4cSDarrick J. Wong dageo->blksize = xfs_dir2_dirblock_bytes(&mp->m_sb); 13130f712c9SDave Chinner dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; 13230f712c9SDave Chinner 13330f712c9SDave Chinner /* 13430f712c9SDave Chinner * Now we've set up the block conversion variables, we can calculate the 13530f712c9SDave Chinner * segment block constants using the geometry structure. 13630f712c9SDave Chinner */ 13730f712c9SDave Chinner dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); 13830f712c9SDave Chinner dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); 13930f712c9SDave Chinner dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); 14030f712c9SDave Chinner dageo->node_ents = (dageo->blksize - nodehdr_size) / 14130f712c9SDave Chinner (uint)sizeof(xfs_da_node_entry_t); 14230f712c9SDave Chinner dageo->magicpct = (dageo->blksize * 37) / 100; 14330f712c9SDave Chinner 14430f712c9SDave Chinner /* set up attribute geometry - single fsb only */ 14530f712c9SDave Chinner dageo = mp->m_attr_geo; 14630f712c9SDave Chinner dageo->blklog = mp->m_sb.sb_blocklog; 14730f712c9SDave Chinner dageo->fsblog = mp->m_sb.sb_blocklog; 14830f712c9SDave Chinner dageo->blksize = 1 << dageo->blklog; 14930f712c9SDave Chinner dageo->fsbcount = 1; 15030f712c9SDave Chinner dageo->node_ents = (dageo->blksize - nodehdr_size) / 15130f712c9SDave Chinner (uint)sizeof(xfs_da_node_entry_t); 15230f712c9SDave Chinner dageo->magicpct = (dageo->blksize * 37) / 100; 15330f712c9SDave Chinner 15430f712c9SDave Chinner if (xfs_sb_version_hasasciici(&mp->m_sb)) 15530f712c9SDave Chinner mp->m_dirnameops = &xfs_ascii_ci_nameops; 15630f712c9SDave Chinner else 15730f712c9SDave Chinner mp->m_dirnameops = &xfs_default_nameops; 15830f712c9SDave Chinner 15930f712c9SDave Chinner return 0; 16030f712c9SDave Chinner } 16130f712c9SDave Chinner 16230f712c9SDave Chinner void 16330f712c9SDave Chinner xfs_da_unmount( 16430f712c9SDave Chinner struct xfs_mount *mp) 16530f712c9SDave Chinner { 16630f712c9SDave Chinner kmem_free(mp->m_dir_geo); 16730f712c9SDave Chinner kmem_free(mp->m_attr_geo); 16830f712c9SDave Chinner } 16930f712c9SDave Chinner 17030f712c9SDave Chinner /* 17130f712c9SDave Chinner * Return 1 if directory contains only "." and "..". 17230f712c9SDave Chinner */ 17330f712c9SDave Chinner int 17430f712c9SDave Chinner xfs_dir_isempty( 17530f712c9SDave Chinner xfs_inode_t *dp) 17630f712c9SDave Chinner { 17730f712c9SDave Chinner xfs_dir2_sf_hdr_t *sfp; 17830f712c9SDave Chinner 179c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 18030f712c9SDave Chinner if (dp->i_d.di_size == 0) /* might happen during shutdown. */ 18130f712c9SDave Chinner return 1; 18230f712c9SDave Chinner if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) 18330f712c9SDave Chinner return 0; 18430f712c9SDave Chinner sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; 18530f712c9SDave Chinner return !sfp->count; 18630f712c9SDave Chinner } 18730f712c9SDave Chinner 18830f712c9SDave Chinner /* 18930f712c9SDave Chinner * Validate a given inode number. 19030f712c9SDave Chinner */ 19130f712c9SDave Chinner int 19230f712c9SDave Chinner xfs_dir_ino_validate( 19330f712c9SDave Chinner xfs_mount_t *mp, 19430f712c9SDave Chinner xfs_ino_t ino) 19530f712c9SDave Chinner { 19691fb9afcSDarrick J. Wong bool ino_ok = xfs_verify_dir_ino(mp, ino); 19730f712c9SDave Chinner 1989e24cfd0SDarrick J. Wong if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE))) { 19930f712c9SDave Chinner xfs_warn(mp, "Invalid inode number 0x%Lx", 20030f712c9SDave Chinner (unsigned long long) ino); 20130f712c9SDave Chinner XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); 2022451337dSDave Chinner return -EFSCORRUPTED; 20330f712c9SDave Chinner } 20430f712c9SDave Chinner return 0; 20530f712c9SDave Chinner } 20630f712c9SDave Chinner 20730f712c9SDave Chinner /* 20830f712c9SDave Chinner * Initialize a directory with its "." and ".." entries. 20930f712c9SDave Chinner */ 21030f712c9SDave Chinner int 21130f712c9SDave Chinner xfs_dir_init( 21230f712c9SDave Chinner xfs_trans_t *tp, 21330f712c9SDave Chinner xfs_inode_t *dp, 21430f712c9SDave Chinner xfs_inode_t *pdp) 21530f712c9SDave Chinner { 21630f712c9SDave Chinner struct xfs_da_args *args; 21730f712c9SDave Chinner int error; 21830f712c9SDave Chinner 219c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 22030f712c9SDave Chinner error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); 22130f712c9SDave Chinner if (error) 22230f712c9SDave Chinner return error; 22330f712c9SDave Chinner 22430f712c9SDave Chinner args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); 22530f712c9SDave Chinner if (!args) 2262451337dSDave Chinner return -ENOMEM; 22730f712c9SDave Chinner 22830f712c9SDave Chinner args->geo = dp->i_mount->m_dir_geo; 22930f712c9SDave Chinner args->dp = dp; 23030f712c9SDave Chinner args->trans = tp; 23130f712c9SDave Chinner error = xfs_dir2_sf_create(args, pdp->i_ino); 23230f712c9SDave Chinner kmem_free(args); 23330f712c9SDave Chinner return error; 23430f712c9SDave Chinner } 23530f712c9SDave Chinner 23630f712c9SDave Chinner /* 237b16ed7c1SEric Sandeen * Enter a name in a directory, or check for available space. 238b16ed7c1SEric Sandeen * If inum is 0, only the available space test is performed. 23930f712c9SDave Chinner */ 24030f712c9SDave Chinner int 24130f712c9SDave Chinner xfs_dir_createname( 24232a9b7c6SBrian Foster struct xfs_trans *tp, 24332a9b7c6SBrian Foster struct xfs_inode *dp, 24430f712c9SDave Chinner struct xfs_name *name, 24530f712c9SDave Chinner xfs_ino_t inum, /* new entry inode number */ 24630f712c9SDave Chinner xfs_extlen_t total) /* bmap's total block count */ 24730f712c9SDave Chinner { 24830f712c9SDave Chinner struct xfs_da_args *args; 24930f712c9SDave Chinner int rval; 25030f712c9SDave Chinner int v; /* type-checking value */ 25130f712c9SDave Chinner 252c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 253c9cfdb38SBrian Foster 254b16ed7c1SEric Sandeen if (inum) { 25530f712c9SDave Chinner rval = xfs_dir_ino_validate(tp->t_mountp, inum); 25630f712c9SDave Chinner if (rval) 25730f712c9SDave Chinner return rval; 258ff6d6af2SBill O'Donnell XFS_STATS_INC(dp->i_mount, xs_dir_create); 259b16ed7c1SEric Sandeen } 26030f712c9SDave Chinner 26130f712c9SDave Chinner args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); 26230f712c9SDave Chinner if (!args) 2632451337dSDave Chinner return -ENOMEM; 26430f712c9SDave Chinner 26530f712c9SDave Chinner args->geo = dp->i_mount->m_dir_geo; 26630f712c9SDave Chinner args->name = name->name; 26730f712c9SDave Chinner args->namelen = name->len; 26830f712c9SDave Chinner args->filetype = name->type; 26930f712c9SDave Chinner args->hashval = dp->i_mount->m_dirnameops->hashname(name); 27030f712c9SDave Chinner args->inumber = inum; 27130f712c9SDave Chinner args->dp = dp; 27230f712c9SDave Chinner args->total = total; 27330f712c9SDave Chinner args->whichfork = XFS_DATA_FORK; 27430f712c9SDave Chinner args->trans = tp; 27530f712c9SDave Chinner args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; 276b16ed7c1SEric Sandeen if (!inum) 277b16ed7c1SEric Sandeen args->op_flags |= XFS_DA_OP_JUSTCHECK; 27830f712c9SDave Chinner 27930f712c9SDave Chinner if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { 28030f712c9SDave Chinner rval = xfs_dir2_sf_addname(args); 28130f712c9SDave Chinner goto out_free; 28230f712c9SDave Chinner } 28330f712c9SDave Chinner 28430f712c9SDave Chinner rval = xfs_dir2_isblock(args, &v); 28530f712c9SDave Chinner if (rval) 28630f712c9SDave Chinner goto out_free; 28730f712c9SDave Chinner if (v) { 28830f712c9SDave Chinner rval = xfs_dir2_block_addname(args); 28930f712c9SDave Chinner goto out_free; 29030f712c9SDave Chinner } 29130f712c9SDave Chinner 29230f712c9SDave Chinner rval = xfs_dir2_isleaf(args, &v); 29330f712c9SDave Chinner if (rval) 29430f712c9SDave Chinner goto out_free; 29530f712c9SDave Chinner if (v) 29630f712c9SDave Chinner rval = xfs_dir2_leaf_addname(args); 29730f712c9SDave Chinner else 29830f712c9SDave Chinner rval = xfs_dir2_node_addname(args); 29930f712c9SDave Chinner 30030f712c9SDave Chinner out_free: 30130f712c9SDave Chinner kmem_free(args); 30230f712c9SDave Chinner return rval; 30330f712c9SDave Chinner } 30430f712c9SDave Chinner 30530f712c9SDave Chinner /* 30630f712c9SDave Chinner * If doing a CI lookup and case-insensitive match, dup actual name into 30730f712c9SDave Chinner * args.value. Return EEXIST for success (ie. name found) or an error. 30830f712c9SDave Chinner */ 30930f712c9SDave Chinner int 31030f712c9SDave Chinner xfs_dir_cilookup_result( 31130f712c9SDave Chinner struct xfs_da_args *args, 31230f712c9SDave Chinner const unsigned char *name, 31330f712c9SDave Chinner int len) 31430f712c9SDave Chinner { 31530f712c9SDave Chinner if (args->cmpresult == XFS_CMP_DIFFERENT) 3162451337dSDave Chinner return -ENOENT; 31730f712c9SDave Chinner if (args->cmpresult != XFS_CMP_CASE || 31830f712c9SDave Chinner !(args->op_flags & XFS_DA_OP_CILOOKUP)) 3192451337dSDave Chinner return -EEXIST; 32030f712c9SDave Chinner 32130f712c9SDave Chinner args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); 32230f712c9SDave Chinner if (!args->value) 3232451337dSDave Chinner return -ENOMEM; 32430f712c9SDave Chinner 32530f712c9SDave Chinner memcpy(args->value, name, len); 32630f712c9SDave Chinner args->valuelen = len; 3272451337dSDave Chinner return -EEXIST; 32830f712c9SDave Chinner } 32930f712c9SDave Chinner 33030f712c9SDave Chinner /* 33130f712c9SDave Chinner * Lookup a name in a directory, give back the inode number. 33230f712c9SDave Chinner * If ci_name is not NULL, returns the actual name in ci_name if it differs 33330f712c9SDave Chinner * to name, or ci_name->name is set to NULL for an exact match. 33430f712c9SDave Chinner */ 33530f712c9SDave Chinner 33630f712c9SDave Chinner int 33730f712c9SDave Chinner xfs_dir_lookup( 33830f712c9SDave Chinner xfs_trans_t *tp, 33930f712c9SDave Chinner xfs_inode_t *dp, 34030f712c9SDave Chinner struct xfs_name *name, 34130f712c9SDave Chinner xfs_ino_t *inum, /* out: inode number */ 34230f712c9SDave Chinner struct xfs_name *ci_name) /* out: actual name if CI match */ 34330f712c9SDave Chinner { 34430f712c9SDave Chinner struct xfs_da_args *args; 34530f712c9SDave Chinner int rval; 34630f712c9SDave Chinner int v; /* type-checking value */ 347dbad7c99SDave Chinner int lock_mode; 34830f712c9SDave Chinner 349c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 350ff6d6af2SBill O'Donnell XFS_STATS_INC(dp->i_mount, xs_dir_lookup); 35130f712c9SDave Chinner 35230f712c9SDave Chinner /* 35330f712c9SDave Chinner * We need to use KM_NOFS here so that lockdep will not throw false 35430f712c9SDave Chinner * positive deadlock warnings on a non-transactional lookup path. It is 35530f712c9SDave Chinner * safe to recurse into inode recalim in that case, but lockdep can't 35630f712c9SDave Chinner * easily be taught about it. Hence KM_NOFS avoids having to add more 35730f712c9SDave Chinner * lockdep Doing this avoids having to add a bunch of lockdep class 35830f712c9SDave Chinner * annotations into the reclaim path for the ilock. 35930f712c9SDave Chinner */ 36030f712c9SDave Chinner args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); 36130f712c9SDave Chinner args->geo = dp->i_mount->m_dir_geo; 36230f712c9SDave Chinner args->name = name->name; 36330f712c9SDave Chinner args->namelen = name->len; 36430f712c9SDave Chinner args->filetype = name->type; 36530f712c9SDave Chinner args->hashval = dp->i_mount->m_dirnameops->hashname(name); 36630f712c9SDave Chinner args->dp = dp; 36730f712c9SDave Chinner args->whichfork = XFS_DATA_FORK; 36830f712c9SDave Chinner args->trans = tp; 36930f712c9SDave Chinner args->op_flags = XFS_DA_OP_OKNOENT; 37030f712c9SDave Chinner if (ci_name) 37130f712c9SDave Chinner args->op_flags |= XFS_DA_OP_CILOOKUP; 37230f712c9SDave Chinner 373dbad7c99SDave Chinner lock_mode = xfs_ilock_data_map_shared(dp); 37430f712c9SDave Chinner if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { 37530f712c9SDave Chinner rval = xfs_dir2_sf_lookup(args); 37630f712c9SDave Chinner goto out_check_rval; 37730f712c9SDave Chinner } 37830f712c9SDave Chinner 37930f712c9SDave Chinner rval = xfs_dir2_isblock(args, &v); 38030f712c9SDave Chinner if (rval) 38130f712c9SDave Chinner goto out_free; 38230f712c9SDave Chinner if (v) { 38330f712c9SDave Chinner rval = xfs_dir2_block_lookup(args); 38430f712c9SDave Chinner goto out_check_rval; 38530f712c9SDave Chinner } 38630f712c9SDave Chinner 38730f712c9SDave Chinner rval = xfs_dir2_isleaf(args, &v); 38830f712c9SDave Chinner if (rval) 38930f712c9SDave Chinner goto out_free; 39030f712c9SDave Chinner if (v) 39130f712c9SDave Chinner rval = xfs_dir2_leaf_lookup(args); 39230f712c9SDave Chinner else 39330f712c9SDave Chinner rval = xfs_dir2_node_lookup(args); 39430f712c9SDave Chinner 39530f712c9SDave Chinner out_check_rval: 3962451337dSDave Chinner if (rval == -EEXIST) 39730f712c9SDave Chinner rval = 0; 39830f712c9SDave Chinner if (!rval) { 39930f712c9SDave Chinner *inum = args->inumber; 40030f712c9SDave Chinner if (ci_name) { 40130f712c9SDave Chinner ci_name->name = args->value; 40230f712c9SDave Chinner ci_name->len = args->valuelen; 40330f712c9SDave Chinner } 40430f712c9SDave Chinner } 40530f712c9SDave Chinner out_free: 406dbad7c99SDave Chinner xfs_iunlock(dp, lock_mode); 40730f712c9SDave Chinner kmem_free(args); 40830f712c9SDave Chinner return rval; 40930f712c9SDave Chinner } 41030f712c9SDave Chinner 41130f712c9SDave Chinner /* 41230f712c9SDave Chinner * Remove an entry from a directory. 41330f712c9SDave Chinner */ 41430f712c9SDave Chinner int 41530f712c9SDave Chinner xfs_dir_removename( 41632a9b7c6SBrian Foster struct xfs_trans *tp, 41732a9b7c6SBrian Foster struct xfs_inode *dp, 41830f712c9SDave Chinner struct xfs_name *name, 41930f712c9SDave Chinner xfs_ino_t ino, 42030f712c9SDave Chinner xfs_extlen_t total) /* bmap's total block count */ 42130f712c9SDave Chinner { 42230f712c9SDave Chinner struct xfs_da_args *args; 42330f712c9SDave Chinner int rval; 42430f712c9SDave Chinner int v; /* type-checking value */ 42530f712c9SDave Chinner 426c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 427c9cfdb38SBrian Foster ASSERT(tp->t_dfops); 428ff6d6af2SBill O'Donnell XFS_STATS_INC(dp->i_mount, xs_dir_remove); 42930f712c9SDave Chinner 43030f712c9SDave Chinner args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); 43130f712c9SDave Chinner if (!args) 4322451337dSDave Chinner return -ENOMEM; 43330f712c9SDave Chinner 43430f712c9SDave Chinner args->geo = dp->i_mount->m_dir_geo; 43530f712c9SDave Chinner args->name = name->name; 43630f712c9SDave Chinner args->namelen = name->len; 43730f712c9SDave Chinner args->filetype = name->type; 43830f712c9SDave Chinner args->hashval = dp->i_mount->m_dirnameops->hashname(name); 43930f712c9SDave Chinner args->inumber = ino; 44030f712c9SDave Chinner args->dp = dp; 44130f712c9SDave Chinner args->total = total; 44230f712c9SDave Chinner args->whichfork = XFS_DATA_FORK; 44330f712c9SDave Chinner args->trans = tp; 44430f712c9SDave Chinner 44530f712c9SDave Chinner if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { 44630f712c9SDave Chinner rval = xfs_dir2_sf_removename(args); 44730f712c9SDave Chinner goto out_free; 44830f712c9SDave Chinner } 44930f712c9SDave Chinner 45030f712c9SDave Chinner rval = xfs_dir2_isblock(args, &v); 45130f712c9SDave Chinner if (rval) 45230f712c9SDave Chinner goto out_free; 45330f712c9SDave Chinner if (v) { 45430f712c9SDave Chinner rval = xfs_dir2_block_removename(args); 45530f712c9SDave Chinner goto out_free; 45630f712c9SDave Chinner } 45730f712c9SDave Chinner 45830f712c9SDave Chinner rval = xfs_dir2_isleaf(args, &v); 45930f712c9SDave Chinner if (rval) 46030f712c9SDave Chinner goto out_free; 46130f712c9SDave Chinner if (v) 46230f712c9SDave Chinner rval = xfs_dir2_leaf_removename(args); 46330f712c9SDave Chinner else 46430f712c9SDave Chinner rval = xfs_dir2_node_removename(args); 46530f712c9SDave Chinner out_free: 46630f712c9SDave Chinner kmem_free(args); 46730f712c9SDave Chinner return rval; 46830f712c9SDave Chinner } 46930f712c9SDave Chinner 47030f712c9SDave Chinner /* 47130f712c9SDave Chinner * Replace the inode number of a directory entry. 47230f712c9SDave Chinner */ 47330f712c9SDave Chinner int 47430f712c9SDave Chinner xfs_dir_replace( 47532a9b7c6SBrian Foster struct xfs_trans *tp, 47632a9b7c6SBrian Foster struct xfs_inode *dp, 47730f712c9SDave Chinner struct xfs_name *name, /* name of entry to replace */ 47830f712c9SDave Chinner xfs_ino_t inum, /* new inode number */ 47930f712c9SDave Chinner xfs_extlen_t total) /* bmap's total block count */ 48030f712c9SDave Chinner { 48130f712c9SDave Chinner struct xfs_da_args *args; 48230f712c9SDave Chinner int rval; 48330f712c9SDave Chinner int v; /* type-checking value */ 48430f712c9SDave Chinner 485c19b3b05SDave Chinner ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); 486c9cfdb38SBrian Foster ASSERT(tp->t_dfops); 48730f712c9SDave Chinner 48830f712c9SDave Chinner rval = xfs_dir_ino_validate(tp->t_mountp, inum); 48930f712c9SDave Chinner if (rval) 49030f712c9SDave Chinner return rval; 49130f712c9SDave Chinner 49230f712c9SDave Chinner args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); 49330f712c9SDave Chinner if (!args) 4942451337dSDave Chinner return -ENOMEM; 49530f712c9SDave Chinner 49630f712c9SDave Chinner args->geo = dp->i_mount->m_dir_geo; 49730f712c9SDave Chinner args->name = name->name; 49830f712c9SDave Chinner args->namelen = name->len; 49930f712c9SDave Chinner args->filetype = name->type; 50030f712c9SDave Chinner args->hashval = dp->i_mount->m_dirnameops->hashname(name); 50130f712c9SDave Chinner args->inumber = inum; 50230f712c9SDave Chinner args->dp = dp; 50330f712c9SDave Chinner args->total = total; 50430f712c9SDave Chinner args->whichfork = XFS_DATA_FORK; 50530f712c9SDave Chinner args->trans = tp; 50630f712c9SDave Chinner 50730f712c9SDave Chinner if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { 50830f712c9SDave Chinner rval = xfs_dir2_sf_replace(args); 50930f712c9SDave Chinner goto out_free; 51030f712c9SDave Chinner } 51130f712c9SDave Chinner 51230f712c9SDave Chinner rval = xfs_dir2_isblock(args, &v); 51330f712c9SDave Chinner if (rval) 51430f712c9SDave Chinner goto out_free; 51530f712c9SDave Chinner if (v) { 51630f712c9SDave Chinner rval = xfs_dir2_block_replace(args); 51730f712c9SDave Chinner goto out_free; 51830f712c9SDave Chinner } 51930f712c9SDave Chinner 52030f712c9SDave Chinner rval = xfs_dir2_isleaf(args, &v); 52130f712c9SDave Chinner if (rval) 52230f712c9SDave Chinner goto out_free; 52330f712c9SDave Chinner if (v) 52430f712c9SDave Chinner rval = xfs_dir2_leaf_replace(args); 52530f712c9SDave Chinner else 52630f712c9SDave Chinner rval = xfs_dir2_node_replace(args); 52730f712c9SDave Chinner out_free: 52830f712c9SDave Chinner kmem_free(args); 52930f712c9SDave Chinner return rval; 53030f712c9SDave Chinner } 53130f712c9SDave Chinner 53230f712c9SDave Chinner /* 53330f712c9SDave Chinner * See if this entry can be added to the directory without allocating space. 53430f712c9SDave Chinner */ 53530f712c9SDave Chinner int 53630f712c9SDave Chinner xfs_dir_canenter( 53730f712c9SDave Chinner xfs_trans_t *tp, 53830f712c9SDave Chinner xfs_inode_t *dp, 53994f3cad5SEric Sandeen struct xfs_name *name) /* name of entry to add */ 54030f712c9SDave Chinner { 541381eee69SBrian Foster return xfs_dir_createname(tp, dp, name, 0, 0); 54230f712c9SDave Chinner } 54330f712c9SDave Chinner 54430f712c9SDave Chinner /* 54530f712c9SDave Chinner * Utility routines. 54630f712c9SDave Chinner */ 54730f712c9SDave Chinner 54830f712c9SDave Chinner /* 54930f712c9SDave Chinner * Add a block to the directory. 55030f712c9SDave Chinner * 55130f712c9SDave Chinner * This routine is for data and free blocks, not leaf/node blocks which are 55230f712c9SDave Chinner * handled by xfs_da_grow_inode. 55330f712c9SDave Chinner */ 55430f712c9SDave Chinner int 55530f712c9SDave Chinner xfs_dir2_grow_inode( 55630f712c9SDave Chinner struct xfs_da_args *args, 55730f712c9SDave Chinner int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ 55830f712c9SDave Chinner xfs_dir2_db_t *dbp) /* out: block number added */ 55930f712c9SDave Chinner { 56030f712c9SDave Chinner struct xfs_inode *dp = args->dp; 56130f712c9SDave Chinner struct xfs_mount *mp = dp->i_mount; 56230f712c9SDave Chinner xfs_fileoff_t bno; /* directory offset of new block */ 56330f712c9SDave Chinner int count; /* count of filesystem blocks */ 56430f712c9SDave Chinner int error; 56530f712c9SDave Chinner 56630f712c9SDave Chinner trace_xfs_dir2_grow_inode(args, space); 56730f712c9SDave Chinner 56830f712c9SDave Chinner /* 56930f712c9SDave Chinner * Set lowest possible block in the space requested. 57030f712c9SDave Chinner */ 57130f712c9SDave Chinner bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); 57230f712c9SDave Chinner count = args->geo->fsbcount; 57330f712c9SDave Chinner 57430f712c9SDave Chinner error = xfs_da_grow_inode_int(args, &bno, count); 57530f712c9SDave Chinner if (error) 57630f712c9SDave Chinner return error; 57730f712c9SDave Chinner 57830f712c9SDave Chinner *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); 57930f712c9SDave Chinner 58030f712c9SDave Chinner /* 58130f712c9SDave Chinner * Update file's size if this is the data space and it grew. 58230f712c9SDave Chinner */ 58330f712c9SDave Chinner if (space == XFS_DIR2_DATA_SPACE) { 58430f712c9SDave Chinner xfs_fsize_t size; /* directory file (data) size */ 58530f712c9SDave Chinner 58630f712c9SDave Chinner size = XFS_FSB_TO_B(mp, bno + count); 58730f712c9SDave Chinner if (size > dp->i_d.di_size) { 58830f712c9SDave Chinner dp->i_d.di_size = size; 58930f712c9SDave Chinner xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); 59030f712c9SDave Chinner } 59130f712c9SDave Chinner } 59230f712c9SDave Chinner return 0; 59330f712c9SDave Chinner } 59430f712c9SDave Chinner 59530f712c9SDave Chinner /* 59630f712c9SDave Chinner * See if the directory is a single-block form directory. 59730f712c9SDave Chinner */ 59830f712c9SDave Chinner int 59930f712c9SDave Chinner xfs_dir2_isblock( 60030f712c9SDave Chinner struct xfs_da_args *args, 60130f712c9SDave Chinner int *vp) /* out: 1 is block, 0 is not block */ 60230f712c9SDave Chinner { 60330f712c9SDave Chinner xfs_fileoff_t last; /* last file offset */ 60430f712c9SDave Chinner int rval; 60530f712c9SDave Chinner 60630f712c9SDave Chinner if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) 60730f712c9SDave Chinner return rval; 60830f712c9SDave Chinner rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; 6093c6f46eaSAmir Goldstein if (rval != 0 && args->dp->i_d.di_size != args->geo->blksize) 6103c6f46eaSAmir Goldstein return -EFSCORRUPTED; 61130f712c9SDave Chinner *vp = rval; 61230f712c9SDave Chinner return 0; 61330f712c9SDave Chinner } 61430f712c9SDave Chinner 61530f712c9SDave Chinner /* 61630f712c9SDave Chinner * See if the directory is a single-leaf form directory. 61730f712c9SDave Chinner */ 61830f712c9SDave Chinner int 61930f712c9SDave Chinner xfs_dir2_isleaf( 62030f712c9SDave Chinner struct xfs_da_args *args, 62130f712c9SDave Chinner int *vp) /* out: 1 is block, 0 is not block */ 62230f712c9SDave Chinner { 62330f712c9SDave Chinner xfs_fileoff_t last; /* last file offset */ 62430f712c9SDave Chinner int rval; 62530f712c9SDave Chinner 62630f712c9SDave Chinner if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) 62730f712c9SDave Chinner return rval; 62830f712c9SDave Chinner *vp = last == args->geo->leafblk + args->geo->fsbcount; 62930f712c9SDave Chinner return 0; 63030f712c9SDave Chinner } 63130f712c9SDave Chinner 63230f712c9SDave Chinner /* 63330f712c9SDave Chinner * Remove the given block from the directory. 63430f712c9SDave Chinner * This routine is used for data and free blocks, leaf/node are done 63530f712c9SDave Chinner * by xfs_da_shrink_inode. 63630f712c9SDave Chinner */ 63730f712c9SDave Chinner int 63830f712c9SDave Chinner xfs_dir2_shrink_inode( 63932a9b7c6SBrian Foster struct xfs_da_args *args, 64030f712c9SDave Chinner xfs_dir2_db_t db, 64130f712c9SDave Chinner struct xfs_buf *bp) 64230f712c9SDave Chinner { 64330f712c9SDave Chinner xfs_fileoff_t bno; /* directory file offset */ 64430f712c9SDave Chinner xfs_dablk_t da; /* directory file offset */ 64530f712c9SDave Chinner int done; /* bunmap is finished */ 64632a9b7c6SBrian Foster struct xfs_inode *dp; 64730f712c9SDave Chinner int error; 64832a9b7c6SBrian Foster struct xfs_mount *mp; 64932a9b7c6SBrian Foster struct xfs_trans *tp; 65030f712c9SDave Chinner 65130f712c9SDave Chinner trace_xfs_dir2_shrink_inode(args, db); 65230f712c9SDave Chinner 65330f712c9SDave Chinner dp = args->dp; 65430f712c9SDave Chinner mp = dp->i_mount; 65530f712c9SDave Chinner tp = args->trans; 65630f712c9SDave Chinner da = xfs_dir2_db_to_da(args->geo, db); 657ab7bb610SDave Chinner 658ab7bb610SDave Chinner /* Unmap the fsblock(s). */ 659*2af52842SBrian Foster error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, &done); 660ab7bb610SDave Chinner if (error) { 66130f712c9SDave Chinner /* 662ab7bb610SDave Chinner * ENOSPC actually can happen if we're in a removename with no 663ab7bb610SDave Chinner * space reservation, and the resulting block removal would 664ab7bb610SDave Chinner * cause a bmap btree split or conversion from extents to btree. 665ab7bb610SDave Chinner * This can only happen for un-fragmented directory blocks, 666ab7bb610SDave Chinner * since you need to be punching out the middle of an extent. 667ab7bb610SDave Chinner * In this case we need to leave the block in the file, and not 668ab7bb610SDave Chinner * binval it. So the block has to be in a consistent empty 669ab7bb610SDave Chinner * state and appropriately logged. We don't free up the buffer, 670ab7bb610SDave Chinner * the caller can tell it hasn't happened since it got an error 671ab7bb610SDave Chinner * back. 67230f712c9SDave Chinner */ 67330f712c9SDave Chinner return error; 67430f712c9SDave Chinner } 67530f712c9SDave Chinner ASSERT(done); 67630f712c9SDave Chinner /* 67730f712c9SDave Chinner * Invalidate the buffer from the transaction. 67830f712c9SDave Chinner */ 67930f712c9SDave Chinner xfs_trans_binval(tp, bp); 68030f712c9SDave Chinner /* 68130f712c9SDave Chinner * If it's not a data block, we're done. 68230f712c9SDave Chinner */ 68330f712c9SDave Chinner if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) 68430f712c9SDave Chinner return 0; 68530f712c9SDave Chinner /* 68630f712c9SDave Chinner * If the block isn't the last one in the directory, we're done. 68730f712c9SDave Chinner */ 68830f712c9SDave Chinner if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) 68930f712c9SDave Chinner return 0; 69030f712c9SDave Chinner bno = da; 69130f712c9SDave Chinner if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { 69230f712c9SDave Chinner /* 69330f712c9SDave Chinner * This can't really happen unless there's kernel corruption. 69430f712c9SDave Chinner */ 69530f712c9SDave Chinner return error; 69630f712c9SDave Chinner } 69730f712c9SDave Chinner if (db == args->geo->datablk) 69830f712c9SDave Chinner ASSERT(bno == 0); 69930f712c9SDave Chinner else 70030f712c9SDave Chinner ASSERT(bno > 0); 70130f712c9SDave Chinner /* 70230f712c9SDave Chinner * Set the size to the new last block. 70330f712c9SDave Chinner */ 70430f712c9SDave Chinner dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); 70530f712c9SDave Chinner xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); 70630f712c9SDave Chinner return 0; 70730f712c9SDave Chinner } 708