Dave Chinner | 0b61f8a | 2018-06-05 19:42:14 -0700 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 3 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
| 4 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | #include "xfs.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 7 | #include "xfs_fs.h" |
Dave Chinner | a4fbe6a | 2013-10-23 10:51:50 +1100 | [diff] [blame] | 8 | #include "xfs_format.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 9 | #include "xfs_log_format.h" |
| 10 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include "xfs_mount.h" |
Darrick J. Wong | 3ab78df | 2016-08-03 11:15:38 +1000 | [diff] [blame] | 12 | #include "xfs_defer.h" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 13 | #include "xfs_da_format.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 14 | #include "xfs_da_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include "xfs_inode.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 16 | #include "xfs_trans.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 17 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs_bmap.h" |
Dave Chinner | 2b9ab5a | 2013-08-12 20:49:37 +1000 | [diff] [blame] | 19 | #include "xfs_dir2.h" |
Christoph Hellwig | 5792664 | 2011-07-13 13:43:48 +0200 | [diff] [blame] | 20 | #include "xfs_dir2_priv.h" |
Darrick J. Wong | 91fb9af | 2017-10-17 21:37:34 -0700 | [diff] [blame] | 21 | #include "xfs_ialloc.h" |
Darrick J. Wong | e9e899a | 2017-10-31 12:04:49 -0700 | [diff] [blame] | 22 | #include "xfs_errortag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include "xfs_error.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 24 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 26 | struct xfs_name xfs_name_dotdot = { (unsigned char *)"..", 2, XFS_DIR3_FT_DIR }; |
| 27 | |
Dave Chinner | 1b767ee | 2014-12-04 09:43:17 +1100 | [diff] [blame] | 28 | /* |
Amir Goldstein | 1fc4d33 | 2017-01-17 11:41:43 -0800 | [diff] [blame] | 29 | * Convert inode mode to directory entry filetype |
Dave Chinner | 1b767ee | 2014-12-04 09:43:17 +1100 | [diff] [blame] | 30 | */ |
Darrick J. Wong | a5c46e5 | 2017-10-17 21:37:44 -0700 | [diff] [blame] | 31 | unsigned char |
| 32 | xfs_mode_to_ftype( |
| 33 | int mode) |
Amir Goldstein | 1fc4d33 | 2017-01-17 11:41:43 -0800 | [diff] [blame] | 34 | { |
| 35 | switch (mode & S_IFMT) { |
| 36 | case S_IFREG: |
| 37 | return XFS_DIR3_FT_REG_FILE; |
| 38 | case S_IFDIR: |
| 39 | return XFS_DIR3_FT_DIR; |
| 40 | case S_IFCHR: |
| 41 | return XFS_DIR3_FT_CHRDEV; |
| 42 | case S_IFBLK: |
| 43 | return XFS_DIR3_FT_BLKDEV; |
| 44 | case S_IFIFO: |
| 45 | return XFS_DIR3_FT_FIFO; |
| 46 | case S_IFSOCK: |
| 47 | return XFS_DIR3_FT_SOCK; |
| 48 | case S_IFLNK: |
| 49 | return XFS_DIR3_FT_SYMLINK; |
| 50 | default: |
| 51 | return XFS_DIR3_FT_UNKNOWN; |
| 52 | } |
| 53 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | |
Barry Naujok | 189f4bf | 2008-05-21 16:58:55 +1000 | [diff] [blame] | 55 | /* |
| 56 | * ASCII case-insensitive (ie. A-Z) support for directories that was |
| 57 | * used in IRIX. |
| 58 | */ |
| 59 | STATIC xfs_dahash_t |
| 60 | xfs_ascii_ci_hashname( |
| 61 | struct xfs_name *name) |
| 62 | { |
| 63 | xfs_dahash_t hash; |
| 64 | int i; |
| 65 | |
| 66 | for (i = 0, hash = 0; i < name->len; i++) |
| 67 | hash = tolower(name->name[i]) ^ rol32(hash, 7); |
| 68 | |
| 69 | return hash; |
| 70 | } |
| 71 | |
| 72 | STATIC enum xfs_dacmp |
| 73 | xfs_ascii_ci_compname( |
| 74 | struct xfs_da_args *args, |
Dave Chinner | 2bc7542 | 2010-01-20 10:47:17 +1100 | [diff] [blame] | 75 | const unsigned char *name, |
| 76 | int len) |
Barry Naujok | 189f4bf | 2008-05-21 16:58:55 +1000 | [diff] [blame] | 77 | { |
| 78 | enum xfs_dacmp result; |
| 79 | int i; |
| 80 | |
| 81 | if (args->namelen != len) |
| 82 | return XFS_CMP_DIFFERENT; |
| 83 | |
| 84 | result = XFS_CMP_EXACT; |
| 85 | for (i = 0; i < len; i++) { |
| 86 | if (args->name[i] == name[i]) |
| 87 | continue; |
| 88 | if (tolower(args->name[i]) != tolower(name[i])) |
| 89 | return XFS_CMP_DIFFERENT; |
| 90 | result = XFS_CMP_CASE; |
| 91 | } |
| 92 | |
| 93 | return result; |
| 94 | } |
| 95 | |
Bhumika Goyal | cf7841c | 2016-11-28 14:57:42 +1100 | [diff] [blame] | 96 | static const struct xfs_nameops xfs_ascii_ci_nameops = { |
Barry Naujok | 189f4bf | 2008-05-21 16:58:55 +1000 | [diff] [blame] | 97 | .hashname = xfs_ascii_ci_hashname, |
| 98 | .compname = xfs_ascii_ci_compname, |
| 99 | }; |
| 100 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 101 | int |
| 102 | xfs_da_mount( |
| 103 | struct xfs_mount *mp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | { |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 105 | struct xfs_da_geometry *dageo; |
| 106 | int nodehdr_size; |
Dave Chinner | 3780437 | 2013-08-26 14:13:30 +1000 | [diff] [blame] | 107 | |
| 108 | |
Dave Chinner | 5d074a4 | 2014-05-20 07:46:55 +1000 | [diff] [blame] | 109 | ASSERT(mp->m_sb.sb_versionnum & XFS_SB_VERSION_DIRV2BIT); |
Darrick J. Wong | ac503a4 | 2018-01-08 10:51:27 -0800 | [diff] [blame] | 110 | ASSERT(xfs_dir2_dirblock_bytes(&mp->m_sb) <= XFS_MAX_BLOCKSIZE); |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 111 | |
| 112 | mp->m_dir_inode_ops = xfs_dir_get_ops(mp, NULL); |
| 113 | mp->m_nondir_inode_ops = xfs_nondir_get_ops(mp, NULL); |
| 114 | |
Dave Chinner | 1c9a5b2 | 2013-10-30 09:15:02 +1100 | [diff] [blame] | 115 | nodehdr_size = mp->m_dir_inode_ops->node_hdr_size; |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 116 | mp->m_dir_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), |
| 117 | KM_SLEEP | KM_MAYFAIL); |
| 118 | mp->m_attr_geo = kmem_zalloc(sizeof(struct xfs_da_geometry), |
| 119 | KM_SLEEP | KM_MAYFAIL); |
| 120 | if (!mp->m_dir_geo || !mp->m_attr_geo) { |
| 121 | kmem_free(mp->m_dir_geo); |
| 122 | kmem_free(mp->m_attr_geo); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 123 | return -ENOMEM; |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 124 | } |
Dave Chinner | 3780437 | 2013-08-26 14:13:30 +1000 | [diff] [blame] | 125 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 126 | /* set up directory geometry */ |
| 127 | dageo = mp->m_dir_geo; |
| 128 | dageo->blklog = mp->m_sb.sb_blocklog + mp->m_sb.sb_dirblklog; |
| 129 | dageo->fsblog = mp->m_sb.sb_blocklog; |
Darrick J. Wong | ac503a4 | 2018-01-08 10:51:27 -0800 | [diff] [blame] | 130 | dageo->blksize = xfs_dir2_dirblock_bytes(&mp->m_sb); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 131 | dageo->fsbcount = 1 << mp->m_sb.sb_dirblklog; |
Dave Chinner | 3002803 | 2014-06-06 15:08:18 +1000 | [diff] [blame] | 132 | |
| 133 | /* |
| 134 | * Now we've set up the block conversion variables, we can calculate the |
| 135 | * segment block constants using the geometry structure. |
| 136 | */ |
| 137 | dageo->datablk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_DATA_OFFSET); |
| 138 | dageo->leafblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_LEAF_OFFSET); |
| 139 | dageo->freeblk = xfs_dir2_byte_to_da(dageo, XFS_DIR2_FREE_OFFSET); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 140 | dageo->node_ents = (dageo->blksize - nodehdr_size) / |
| 141 | (uint)sizeof(xfs_da_node_entry_t); |
| 142 | dageo->magicpct = (dageo->blksize * 37) / 100; |
| 143 | |
| 144 | /* set up attribute geometry - single fsb only */ |
| 145 | dageo = mp->m_attr_geo; |
| 146 | dageo->blklog = mp->m_sb.sb_blocklog; |
| 147 | dageo->fsblog = mp->m_sb.sb_blocklog; |
| 148 | dageo->blksize = 1 << dageo->blklog; |
| 149 | dageo->fsbcount = 1; |
| 150 | dageo->node_ents = (dageo->blksize - nodehdr_size) / |
| 151 | (uint)sizeof(xfs_da_node_entry_t); |
| 152 | dageo->magicpct = (dageo->blksize * 37) / 100; |
| 153 | |
Barry Naujok | 189f4bf | 2008-05-21 16:58:55 +1000 | [diff] [blame] | 154 | if (xfs_sb_version_hasasciici(&mp->m_sb)) |
| 155 | mp->m_dirnameops = &xfs_ascii_ci_nameops; |
| 156 | else |
| 157 | mp->m_dirnameops = &xfs_default_nameops; |
Dave Chinner | 32c5483 | 2013-10-29 22:11:46 +1100 | [diff] [blame] | 158 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | void |
| 163 | xfs_da_unmount( |
| 164 | struct xfs_mount *mp) |
| 165 | { |
| 166 | kmem_free(mp->m_dir_geo); |
| 167 | kmem_free(mp->m_attr_geo); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } |
| 169 | |
| 170 | /* |
| 171 | * Return 1 if directory contains only "." and "..". |
| 172 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 173 | int |
| 174 | xfs_dir_isempty( |
| 175 | xfs_inode_t *dp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | { |
Christoph Hellwig | ac8ba50 | 2011-07-08 14:35:13 +0200 | [diff] [blame] | 177 | xfs_dir2_sf_hdr_t *sfp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 179 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 180 | if (dp->i_d.di_size == 0) /* might happen during shutdown. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | return 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (dp->i_d.di_size > XFS_IFORK_DSIZE(dp)) |
| 183 | return 0; |
Christoph Hellwig | ac8ba50 | 2011-07-08 14:35:13 +0200 | [diff] [blame] | 184 | sfp = (xfs_dir2_sf_hdr_t *)dp->i_df.if_u1.if_data; |
| 185 | return !sfp->count; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /* |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 189 | * Validate a given inode number. |
| 190 | */ |
| 191 | int |
| 192 | xfs_dir_ino_validate( |
| 193 | xfs_mount_t *mp, |
| 194 | xfs_ino_t ino) |
| 195 | { |
Darrick J. Wong | 91fb9af | 2017-10-17 21:37:34 -0700 | [diff] [blame] | 196 | bool ino_ok = xfs_verify_dir_ino(mp, ino); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 197 | |
Darrick J. Wong | 9e24cfd | 2017-06-20 17:54:47 -0700 | [diff] [blame] | 198 | if (unlikely(XFS_TEST_ERROR(!ino_ok, mp, XFS_ERRTAG_DIR_INO_VALIDATE))) { |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 199 | xfs_warn(mp, "Invalid inode number 0x%Lx", |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 200 | (unsigned long long) ino); |
| 201 | XFS_ERROR_REPORT("xfs_dir_ino_validate", XFS_ERRLEVEL_LOW, mp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 202 | return -EFSCORRUPTED; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 203 | } |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | * Initialize a directory with its "." and ".." entries. |
| 209 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 210 | int |
| 211 | xfs_dir_init( |
| 212 | xfs_trans_t *tp, |
| 213 | xfs_inode_t *dp, |
| 214 | xfs_inode_t *pdp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 216 | struct xfs_da_args *args; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 217 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 219 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 220 | error = xfs_dir_ino_validate(tp->t_mountp, pdp->i_ino); |
| 221 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return error; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 223 | |
| 224 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
| 225 | if (!args) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 226 | return -ENOMEM; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 227 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 228 | args->geo = dp->i_mount->m_dir_geo; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 229 | args->dp = dp; |
| 230 | args->trans = tp; |
| 231 | error = xfs_dir2_sf_create(args, pdp->i_ino); |
| 232 | kmem_free(args); |
| 233 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | /* |
Eric Sandeen | b16ed7c | 2014-09-09 11:58:07 +1000 | [diff] [blame] | 237 | * Enter a name in a directory, or check for available space. |
| 238 | * If inum is 0, only the available space test is performed. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 240 | int |
| 241 | xfs_dir_createname( |
| 242 | xfs_trans_t *tp, |
| 243 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 244 | struct xfs_name *name, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | xfs_ino_t inum, /* new entry inode number */ |
| 246 | xfs_fsblock_t *first, /* bmap's firstblock */ |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 247 | struct xfs_defer_ops *dfops, /* bmap's freeblock list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | xfs_extlen_t total) /* bmap's total block count */ |
| 249 | { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 250 | struct xfs_da_args *args; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 251 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | int v; /* type-checking value */ |
| 253 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 254 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Eric Sandeen | b16ed7c | 2014-09-09 11:58:07 +1000 | [diff] [blame] | 255 | if (inum) { |
| 256 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
| 257 | if (rval) |
| 258 | return rval; |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 259 | XFS_STATS_INC(dp->i_mount, xs_dir_create); |
Eric Sandeen | b16ed7c | 2014-09-09 11:58:07 +1000 | [diff] [blame] | 260 | } |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 261 | |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 262 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
| 263 | if (!args) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 264 | return -ENOMEM; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 265 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 266 | args->geo = dp->i_mount->m_dir_geo; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 267 | args->name = name->name; |
| 268 | args->namelen = name->len; |
| 269 | args->filetype = name->type; |
| 270 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); |
| 271 | args->inumber = inum; |
| 272 | args->dp = dp; |
| 273 | args->firstblock = first; |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 274 | args->dfops = dfops; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 275 | args->total = total; |
| 276 | args->whichfork = XFS_DATA_FORK; |
| 277 | args->trans = tp; |
| 278 | args->op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT; |
Eric Sandeen | b16ed7c | 2014-09-09 11:58:07 +1000 | [diff] [blame] | 279 | if (!inum) |
| 280 | args->op_flags |= XFS_DA_OP_JUSTCHECK; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 281 | |
| 282 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 283 | rval = xfs_dir2_sf_addname(args); |
| 284 | goto out_free; |
| 285 | } |
| 286 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 287 | rval = xfs_dir2_isblock(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 288 | if (rval) |
| 289 | goto out_free; |
| 290 | if (v) { |
| 291 | rval = xfs_dir2_block_addname(args); |
| 292 | goto out_free; |
| 293 | } |
| 294 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 295 | rval = xfs_dir2_isleaf(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 296 | if (rval) |
| 297 | goto out_free; |
| 298 | if (v) |
| 299 | rval = xfs_dir2_leaf_addname(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | else |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 301 | rval = xfs_dir2_node_addname(args); |
| 302 | |
| 303 | out_free: |
| 304 | kmem_free(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | return rval; |
| 306 | } |
| 307 | |
| 308 | /* |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 309 | * If doing a CI lookup and case-insensitive match, dup actual name into |
| 310 | * args.value. Return EEXIST for success (ie. name found) or an error. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 312 | int |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 313 | xfs_dir_cilookup_result( |
| 314 | struct xfs_da_args *args, |
Dave Chinner | a3380ae | 2010-01-20 10:47:25 +1100 | [diff] [blame] | 315 | const unsigned char *name, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 316 | int len) |
| 317 | { |
| 318 | if (args->cmpresult == XFS_CMP_DIFFERENT) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 319 | return -ENOENT; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 320 | if (args->cmpresult != XFS_CMP_CASE || |
| 321 | !(args->op_flags & XFS_DA_OP_CILOOKUP)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 322 | return -EEXIST; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 323 | |
Christoph Hellwig | 3f52c2f | 2009-07-18 18:14:57 -0400 | [diff] [blame] | 324 | args->value = kmem_alloc(len, KM_NOFS | KM_MAYFAIL); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 325 | if (!args->value) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 326 | return -ENOMEM; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 327 | |
| 328 | memcpy(args->value, name, len); |
| 329 | args->valuelen = len; |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 330 | return -EEXIST; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | /* |
| 334 | * Lookup a name in a directory, give back the inode number. |
| 335 | * If ci_name is not NULL, returns the actual name in ci_name if it differs |
| 336 | * to name, or ci_name->name is set to NULL for an exact match. |
| 337 | */ |
| 338 | |
| 339 | int |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 340 | xfs_dir_lookup( |
| 341 | xfs_trans_t *tp, |
| 342 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 343 | struct xfs_name *name, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 344 | xfs_ino_t *inum, /* out: inode number */ |
| 345 | struct xfs_name *ci_name) /* out: actual name if CI match */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 347 | struct xfs_da_args *args; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 348 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | int v; /* type-checking value */ |
Dave Chinner | dbad7c9 | 2015-08-19 10:33:00 +1000 | [diff] [blame] | 350 | int lock_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 352 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 353 | XFS_STATS_INC(dp->i_mount, xs_dir_lookup); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 355 | /* |
| 356 | * We need to use KM_NOFS here so that lockdep will not throw false |
| 357 | * positive deadlock warnings on a non-transactional lookup path. It is |
| 358 | * safe to recurse into inode recalim in that case, but lockdep can't |
| 359 | * easily be taught about it. Hence KM_NOFS avoids having to add more |
| 360 | * lockdep Doing this avoids having to add a bunch of lockdep class |
| 361 | * annotations into the reclaim path for the ilock. |
| 362 | */ |
| 363 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 364 | args->geo = dp->i_mount->m_dir_geo; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 365 | args->name = name->name; |
| 366 | args->namelen = name->len; |
| 367 | args->filetype = name->type; |
| 368 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); |
| 369 | args->dp = dp; |
| 370 | args->whichfork = XFS_DATA_FORK; |
| 371 | args->trans = tp; |
| 372 | args->op_flags = XFS_DA_OP_OKNOENT; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 373 | if (ci_name) |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 374 | args->op_flags |= XFS_DA_OP_CILOOKUP; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 375 | |
Dave Chinner | dbad7c9 | 2015-08-19 10:33:00 +1000 | [diff] [blame] | 376 | lock_mode = xfs_ilock_data_map_shared(dp); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 377 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 378 | rval = xfs_dir2_sf_lookup(args); |
| 379 | goto out_check_rval; |
| 380 | } |
| 381 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 382 | rval = xfs_dir2_isblock(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 383 | if (rval) |
| 384 | goto out_free; |
| 385 | if (v) { |
| 386 | rval = xfs_dir2_block_lookup(args); |
| 387 | goto out_check_rval; |
| 388 | } |
| 389 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 390 | rval = xfs_dir2_isleaf(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 391 | if (rval) |
| 392 | goto out_free; |
| 393 | if (v) |
| 394 | rval = xfs_dir2_leaf_lookup(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | else |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 396 | rval = xfs_dir2_node_lookup(args); |
| 397 | |
| 398 | out_check_rval: |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 399 | if (rval == -EEXIST) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | rval = 0; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 401 | if (!rval) { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 402 | *inum = args->inumber; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 403 | if (ci_name) { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 404 | ci_name->name = args->value; |
| 405 | ci_name->len = args->valuelen; |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 406 | } |
| 407 | } |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 408 | out_free: |
Dave Chinner | dbad7c9 | 2015-08-19 10:33:00 +1000 | [diff] [blame] | 409 | xfs_iunlock(dp, lock_mode); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 410 | kmem_free(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | return rval; |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Remove an entry from a directory. |
| 416 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 417 | int |
| 418 | xfs_dir_removename( |
| 419 | xfs_trans_t *tp, |
| 420 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 421 | struct xfs_name *name, |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 422 | xfs_ino_t ino, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | xfs_fsblock_t *first, /* bmap's firstblock */ |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 424 | struct xfs_defer_ops *dfops, /* bmap's freeblock list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | xfs_extlen_t total) /* bmap's total block count */ |
| 426 | { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 427 | struct xfs_da_args *args; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 428 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | int v; /* type-checking value */ |
| 430 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 431 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 432 | XFS_STATS_INC(dp->i_mount, xs_dir_remove); |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 433 | |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 434 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
| 435 | if (!args) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 436 | return -ENOMEM; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 437 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 438 | args->geo = dp->i_mount->m_dir_geo; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 439 | args->name = name->name; |
| 440 | args->namelen = name->len; |
| 441 | args->filetype = name->type; |
| 442 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); |
| 443 | args->inumber = ino; |
| 444 | args->dp = dp; |
| 445 | args->firstblock = first; |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 446 | args->dfops = dfops; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 447 | args->total = total; |
| 448 | args->whichfork = XFS_DATA_FORK; |
| 449 | args->trans = tp; |
| 450 | |
| 451 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 452 | rval = xfs_dir2_sf_removename(args); |
| 453 | goto out_free; |
| 454 | } |
| 455 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 456 | rval = xfs_dir2_isblock(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 457 | if (rval) |
| 458 | goto out_free; |
| 459 | if (v) { |
| 460 | rval = xfs_dir2_block_removename(args); |
| 461 | goto out_free; |
| 462 | } |
| 463 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 464 | rval = xfs_dir2_isleaf(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 465 | if (rval) |
| 466 | goto out_free; |
| 467 | if (v) |
| 468 | rval = xfs_dir2_leaf_removename(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | else |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 470 | rval = xfs_dir2_node_removename(args); |
| 471 | out_free: |
| 472 | kmem_free(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return rval; |
| 474 | } |
| 475 | |
| 476 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | * Replace the inode number of a directory entry. |
| 478 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 479 | int |
| 480 | xfs_dir_replace( |
| 481 | xfs_trans_t *tp, |
| 482 | xfs_inode_t *dp, |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 483 | struct xfs_name *name, /* name of entry to replace */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | xfs_ino_t inum, /* new inode number */ |
| 485 | xfs_fsblock_t *first, /* bmap's firstblock */ |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 486 | struct xfs_defer_ops *dfops, /* bmap's freeblock list */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | xfs_extlen_t total) /* bmap's total block count */ |
| 488 | { |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 489 | struct xfs_da_args *args; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 490 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | int v; /* type-checking value */ |
| 492 | |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 493 | ASSERT(S_ISDIR(VFS_I(dp)->i_mode)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 495 | rval = xfs_dir_ino_validate(tp->t_mountp, inum); |
| 496 | if (rval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | return rval; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 498 | |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 499 | args = kmem_zalloc(sizeof(*args), KM_SLEEP | KM_NOFS); |
| 500 | if (!args) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 501 | return -ENOMEM; |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 502 | |
Dave Chinner | 0650b55 | 2014-06-06 15:01:58 +1000 | [diff] [blame] | 503 | args->geo = dp->i_mount->m_dir_geo; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 504 | args->name = name->name; |
| 505 | args->namelen = name->len; |
| 506 | args->filetype = name->type; |
| 507 | args->hashval = dp->i_mount->m_dirnameops->hashname(name); |
| 508 | args->inumber = inum; |
| 509 | args->dp = dp; |
| 510 | args->firstblock = first; |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 511 | args->dfops = dfops; |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 512 | args->total = total; |
| 513 | args->whichfork = XFS_DATA_FORK; |
| 514 | args->trans = tp; |
| 515 | |
| 516 | if (dp->i_d.di_format == XFS_DINODE_FMT_LOCAL) { |
| 517 | rval = xfs_dir2_sf_replace(args); |
| 518 | goto out_free; |
| 519 | } |
| 520 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 521 | rval = xfs_dir2_isblock(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 522 | if (rval) |
| 523 | goto out_free; |
| 524 | if (v) { |
| 525 | rval = xfs_dir2_block_replace(args); |
| 526 | goto out_free; |
| 527 | } |
| 528 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 529 | rval = xfs_dir2_isleaf(args, &v); |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 530 | if (rval) |
| 531 | goto out_free; |
| 532 | if (v) |
| 533 | rval = xfs_dir2_leaf_replace(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | else |
Dave Chinner | a1358aa | 2014-02-27 16:51:26 +1100 | [diff] [blame] | 535 | rval = xfs_dir2_node_replace(args); |
| 536 | out_free: |
| 537 | kmem_free(args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | return rval; |
| 539 | } |
| 540 | |
| 541 | /* |
| 542 | * See if this entry can be added to the directory without allocating space. |
| 543 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 544 | int |
| 545 | xfs_dir_canenter( |
| 546 | xfs_trans_t *tp, |
| 547 | xfs_inode_t *dp, |
Eric Sandeen | 94f3cad | 2014-09-09 11:57:52 +1000 | [diff] [blame] | 548 | struct xfs_name *name) /* name of entry to add */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | { |
Eric Sandeen | b16ed7c | 2014-09-09 11:58:07 +1000 | [diff] [blame] | 550 | return xfs_dir_createname(tp, dp, name, 0, NULL, NULL, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | } |
| 552 | |
| 553 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 554 | * Utility routines. |
| 555 | */ |
| 556 | |
| 557 | /* |
| 558 | * Add a block to the directory. |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 559 | * |
| 560 | * This routine is for data and free blocks, not leaf/node blocks which are |
| 561 | * handled by xfs_da_grow_inode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 563 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | xfs_dir2_grow_inode( |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 565 | struct xfs_da_args *args, |
| 566 | int space, /* v2 dir's space XFS_DIR2_xxx_SPACE */ |
| 567 | xfs_dir2_db_t *dbp) /* out: block number added */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | { |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 569 | struct xfs_inode *dp = args->dp; |
| 570 | struct xfs_mount *mp = dp->i_mount; |
| 571 | xfs_fileoff_t bno; /* directory offset of new block */ |
| 572 | int count; /* count of filesystem blocks */ |
| 573 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 575 | trace_xfs_dir2_grow_inode(args, space); |
| 576 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | /* |
| 578 | * Set lowest possible block in the space requested. |
| 579 | */ |
| 580 | bno = XFS_B_TO_FSBT(mp, space * XFS_DIR2_SPACE_SIZE); |
Dave Chinner | d6cf130 | 2014-06-06 15:14:11 +1000 | [diff] [blame] | 581 | count = args->geo->fsbcount; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 582 | |
| 583 | error = xfs_da_grow_inode_int(args, &bno, count); |
| 584 | if (error) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 585 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Dave Chinner | 2998ab1d | 2014-06-06 15:07:53 +1000 | [diff] [blame] | 587 | *dbp = xfs_dir2_da_to_db(args->geo, (xfs_dablk_t)bno); |
David Chinner | a744405 | 2008-10-30 17:38:12 +1100 | [diff] [blame] | 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | /* |
| 590 | * Update file's size if this is the data space and it grew. |
| 591 | */ |
| 592 | if (space == XFS_DIR2_DATA_SPACE) { |
| 593 | xfs_fsize_t size; /* directory file (data) size */ |
| 594 | |
| 595 | size = XFS_FSB_TO_B(mp, bno + count); |
| 596 | if (size > dp->i_d.di_size) { |
| 597 | dp->i_d.di_size = size; |
Christoph Hellwig | 77936d0 | 2011-07-13 13:43:49 +0200 | [diff] [blame] | 598 | xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | } |
| 601 | return 0; |
| 602 | } |
| 603 | |
| 604 | /* |
| 605 | * See if the directory is a single-block form directory. |
| 606 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 607 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | xfs_dir2_isblock( |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 609 | struct xfs_da_args *args, |
| 610 | int *vp) /* out: 1 is block, 0 is not block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | { |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 612 | xfs_fileoff_t last; /* last file offset */ |
| 613 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 615 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | return rval; |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 617 | rval = XFS_FSB_TO_B(args->dp->i_mount, last) == args->geo->blksize; |
Amir Goldstein | 3c6f46e | 2017-01-17 11:41:41 -0800 | [diff] [blame] | 618 | if (rval != 0 && args->dp->i_d.di_size != args->geo->blksize) |
| 619 | return -EFSCORRUPTED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | *vp = rval; |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | /* |
| 625 | * See if the directory is a single-leaf form directory. |
| 626 | */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 627 | int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | xfs_dir2_isleaf( |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 629 | struct xfs_da_args *args, |
| 630 | int *vp) /* out: 1 is block, 0 is not block */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | { |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 632 | xfs_fileoff_t last; /* last file offset */ |
| 633 | int rval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 635 | if ((rval = xfs_bmap_last_offset(args->dp, &last, XFS_DATA_FORK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | return rval; |
Dave Chinner | 53f82db | 2014-06-06 15:20:32 +1000 | [diff] [blame] | 637 | *vp = last == args->geo->leafblk + args->geo->fsbcount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | return 0; |
| 639 | } |
| 640 | |
| 641 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 642 | * Remove the given block from the directory. |
| 643 | * This routine is used for data and free blocks, leaf/node are done |
| 644 | * by xfs_da_shrink_inode. |
| 645 | */ |
| 646 | int |
| 647 | xfs_dir2_shrink_inode( |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 648 | xfs_da_args_t *args, |
| 649 | xfs_dir2_db_t db, |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 650 | struct xfs_buf *bp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | { |
| 652 | xfs_fileoff_t bno; /* directory file offset */ |
| 653 | xfs_dablk_t da; /* directory file offset */ |
| 654 | int done; /* bunmap is finished */ |
Nathan Scott | f6c2d1f | 2006-06-20 13:04:51 +1000 | [diff] [blame] | 655 | xfs_inode_t *dp; |
| 656 | int error; |
| 657 | xfs_mount_t *mp; |
| 658 | xfs_trans_t *tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 659 | |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 660 | trace_xfs_dir2_shrink_inode(args, db); |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | dp = args->dp; |
| 663 | mp = dp->i_mount; |
| 664 | tp = args->trans; |
Dave Chinner | 2998ab1d | 2014-06-06 15:07:53 +1000 | [diff] [blame] | 665 | da = xfs_dir2_db_to_da(args->geo, db); |
Dave Chinner | ab7bb61 | 2015-07-29 11:51:01 +1000 | [diff] [blame] | 666 | |
| 667 | /* Unmap the fsblock(s). */ |
| 668 | error = xfs_bunmapi(tp, dp, da, args->geo->fsbcount, 0, 0, |
Darrick J. Wong | 2c3234d | 2016-08-03 11:19:29 +1000 | [diff] [blame] | 669 | args->firstblock, args->dfops, &done); |
Dave Chinner | ab7bb61 | 2015-07-29 11:51:01 +1000 | [diff] [blame] | 670 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | /* |
Dave Chinner | ab7bb61 | 2015-07-29 11:51:01 +1000 | [diff] [blame] | 672 | * ENOSPC actually can happen if we're in a removename with no |
| 673 | * space reservation, and the resulting block removal would |
| 674 | * cause a bmap btree split or conversion from extents to btree. |
| 675 | * This can only happen for un-fragmented directory blocks, |
| 676 | * since you need to be punching out the middle of an extent. |
| 677 | * In this case we need to leave the block in the file, and not |
| 678 | * binval it. So the block has to be in a consistent empty |
| 679 | * state and appropriately logged. We don't free up the buffer, |
| 680 | * the caller can tell it hasn't happened since it got an error |
| 681 | * back. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | */ |
| 683 | return error; |
| 684 | } |
| 685 | ASSERT(done); |
| 686 | /* |
| 687 | * Invalidate the buffer from the transaction. |
| 688 | */ |
Dave Chinner | 1d9025e | 2012-06-22 18:50:14 +1000 | [diff] [blame] | 689 | xfs_trans_binval(tp, bp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | /* |
| 691 | * If it's not a data block, we're done. |
| 692 | */ |
Dave Chinner | 3002803 | 2014-06-06 15:08:18 +1000 | [diff] [blame] | 693 | if (db >= xfs_dir2_byte_to_db(args->geo, XFS_DIR2_LEAF_OFFSET)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | return 0; |
| 695 | /* |
| 696 | * If the block isn't the last one in the directory, we're done. |
| 697 | */ |
Dave Chinner | 9b3b552 | 2014-06-06 15:06:53 +1000 | [diff] [blame] | 698 | if (dp->i_d.di_size > xfs_dir2_db_off_to_byte(args->geo, db + 1, 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | return 0; |
| 700 | bno = da; |
| 701 | if ((error = xfs_bmap_last_before(tp, dp, &bno, XFS_DATA_FORK))) { |
| 702 | /* |
| 703 | * This can't really happen unless there's kernel corruption. |
| 704 | */ |
| 705 | return error; |
| 706 | } |
Dave Chinner | 7dda6e8 | 2014-06-06 15:11:18 +1000 | [diff] [blame] | 707 | if (db == args->geo->datablk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | ASSERT(bno == 0); |
| 709 | else |
| 710 | ASSERT(bno > 0); |
| 711 | /* |
| 712 | * Set the size to the new last block. |
| 713 | */ |
| 714 | dp->i_d.di_size = XFS_FSB_TO_B(mp, bno); |
| 715 | xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| 716 | return 0; |
| 717 | } |