David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 5 | * This copyrighted material is made available to anyone wishing to use, |
| 6 | * modify, copy, or redistribute it subject to the terms and conditions |
Steven Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 10 | #include <linux/slab.h> |
| 11 | #include <linux/spinlock.h> |
| 12 | #include <linux/completion.h> |
| 13 | #include <linux/buffer_head.h> |
| 14 | #include <linux/xattr.h> |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 15 | #include <linux/gfs2_ondisk.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 16 | #include <asm/uaccess.h> |
| 17 | |
| 18 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 19 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 20 | #include "acl.h" |
Steven Whitehouse | 307cf6e | 2009-08-26 18:51:04 +0100 | [diff] [blame] | 21 | #include "xattr.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 22 | #include "glock.h" |
| 23 | #include "inode.h" |
| 24 | #include "meta_io.h" |
| 25 | #include "quota.h" |
| 26 | #include "rgrp.h" |
| 27 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 28 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | |
| 30 | /** |
| 31 | * ea_calc_size - returns the acutal number of bytes the request will take up |
| 32 | * (not counting any unstuffed data blocks) |
| 33 | * @sdp: |
| 34 | * @er: |
| 35 | * @size: |
| 36 | * |
| 37 | * Returns: 1 if the EA should be stuffed |
| 38 | */ |
| 39 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 40 | static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 41 | unsigned int *size) |
| 42 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 43 | unsigned int jbsize = sdp->sd_jbsize; |
| 44 | |
| 45 | /* Stuffed */ |
| 46 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8); |
| 47 | |
| 48 | if (*size <= jbsize) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 49 | return 1; |
| 50 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 51 | /* Unstuffed */ |
| 52 | *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + |
| 53 | (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 58 | static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 59 | { |
| 60 | unsigned int size; |
| 61 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 62 | if (dsize > GFS2_EA_MAX_DATA_LEN) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 63 | return -ERANGE; |
| 64 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 65 | ea_calc_size(sdp, nsize, dsize, &size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 66 | |
| 67 | /* This can only happen with 512 byte blocks */ |
| 68 | if (size > sdp->sd_jbsize) |
| 69 | return -ERANGE; |
| 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 74 | typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 75 | struct gfs2_ea_header *ea, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 76 | struct gfs2_ea_header *prev, void *private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 77 | |
| 78 | static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 79 | ea_call_t ea_call, void *data) |
| 80 | { |
| 81 | struct gfs2_ea_header *ea, *prev = NULL; |
| 82 | int error = 0; |
| 83 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 84 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 85 | return -EIO; |
| 86 | |
| 87 | for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) { |
| 88 | if (!GFS2_EA_REC_LEN(ea)) |
| 89 | goto fail; |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 90 | if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <= |
| 91 | bh->b_data + bh->b_size)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 92 | goto fail; |
| 93 | if (!GFS2_EATYPE_VALID(ea->ea_type)) |
| 94 | goto fail; |
| 95 | |
| 96 | error = ea_call(ip, bh, ea, prev, data); |
| 97 | if (error) |
| 98 | return error; |
| 99 | |
| 100 | if (GFS2_EA_IS_LAST(ea)) { |
| 101 | if ((char *)GFS2_EA2NEXT(ea) != |
| 102 | bh->b_data + bh->b_size) |
| 103 | goto fail; |
| 104 | break; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | return error; |
| 109 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 110 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 111 | gfs2_consist_inode(ip); |
| 112 | return -EIO; |
| 113 | } |
| 114 | |
| 115 | static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data) |
| 116 | { |
| 117 | struct buffer_head *bh, *eabh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 118 | __be64 *eablk, *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 119 | int error; |
| 120 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 121 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 122 | if (error) |
| 123 | return error; |
| 124 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 125 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 126 | error = ea_foreach_i(ip, bh, ea_call, data); |
| 127 | goto out; |
| 128 | } |
| 129 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 130 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 131 | error = -EIO; |
| 132 | goto out; |
| 133 | } |
| 134 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 135 | eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header)); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 136 | end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 137 | |
| 138 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 139 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 140 | |
| 141 | if (!*eablk) |
| 142 | break; |
| 143 | bn = be64_to_cpu(*eablk); |
| 144 | |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 145 | error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 146 | if (error) |
| 147 | break; |
| 148 | error = ea_foreach_i(ip, eabh, ea_call, data); |
| 149 | brelse(eabh); |
| 150 | if (error) |
| 151 | break; |
| 152 | } |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 153 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 154 | brelse(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 155 | return error; |
| 156 | } |
| 157 | |
| 158 | struct ea_find { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 159 | int type; |
| 160 | const char *name; |
| 161 | size_t namel; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 162 | struct gfs2_ea_location *ef_el; |
| 163 | }; |
| 164 | |
| 165 | static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 166 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 167 | void *private) |
| 168 | { |
| 169 | struct ea_find *ef = private; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 170 | |
| 171 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 172 | return 0; |
| 173 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 174 | if (ea->ea_type == ef->type) { |
| 175 | if (ea->ea_name_len == ef->namel && |
| 176 | !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 177 | struct gfs2_ea_location *el = ef->ef_el; |
| 178 | get_bh(bh); |
| 179 | el->el_bh = bh; |
| 180 | el->el_ea = ea; |
| 181 | el->el_prev = prev; |
| 182 | return 1; |
| 183 | } |
| 184 | } |
| 185 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 186 | return 0; |
| 187 | } |
| 188 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 189 | static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name, |
| 190 | struct gfs2_ea_location *el) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 191 | { |
| 192 | struct ea_find ef; |
| 193 | int error; |
| 194 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 195 | ef.type = type; |
| 196 | ef.name = name; |
| 197 | ef.namel = strlen(name); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 198 | ef.ef_el = el; |
| 199 | |
| 200 | memset(el, 0, sizeof(struct gfs2_ea_location)); |
| 201 | |
| 202 | error = ea_foreach(ip, ea_find_i, &ef); |
| 203 | if (error > 0) |
| 204 | return 0; |
| 205 | |
| 206 | return error; |
| 207 | } |
| 208 | |
| 209 | /** |
| 210 | * ea_dealloc_unstuffed - |
| 211 | * @ip: |
| 212 | * @bh: |
| 213 | * @ea: |
| 214 | * @prev: |
| 215 | * @private: |
| 216 | * |
| 217 | * Take advantage of the fact that all unstuffed blocks are |
| 218 | * allocated from the same RG. But watch, this may not always |
| 219 | * be true. |
| 220 | * |
| 221 | * Returns: errno |
| 222 | */ |
| 223 | |
| 224 | static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 225 | struct gfs2_ea_header *ea, |
| 226 | struct gfs2_ea_header *prev, void *private) |
| 227 | { |
| 228 | int *leave = private; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 229 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 230 | struct gfs2_rgrpd *rgd; |
| 231 | struct gfs2_holder rg_gh; |
| 232 | struct buffer_head *dibh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 233 | __be64 *dataptrs; |
| 234 | u64 bn = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 235 | u64 bstart = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 236 | unsigned int blen = 0; |
| 237 | unsigned int blks = 0; |
| 238 | unsigned int x; |
| 239 | int error; |
| 240 | |
| 241 | if (GFS2_EA_IS_STUFFED(ea)) |
| 242 | return 0; |
| 243 | |
| 244 | dataptrs = GFS2_EA2DATAPTRS(ea); |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 245 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 246 | if (*dataptrs) { |
| 247 | blks++; |
| 248 | bn = be64_to_cpu(*dataptrs); |
| 249 | } |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 250 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 251 | if (!blks) |
| 252 | return 0; |
| 253 | |
| 254 | rgd = gfs2_blk2rgrpd(sdp, bn); |
| 255 | if (!rgd) { |
| 256 | gfs2_consist_inode(ip); |
| 257 | return -EIO; |
| 258 | } |
| 259 | |
| 260 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh); |
| 261 | if (error) |
| 262 | return error; |
| 263 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 264 | error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE + |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 265 | RES_EATTR + RES_STATFS + RES_QUOTA, blks); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 266 | if (error) |
| 267 | goto out_gunlock; |
| 268 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 269 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 270 | |
| 271 | dataptrs = GFS2_EA2DATAPTRS(ea); |
| 272 | for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) { |
| 273 | if (!*dataptrs) |
| 274 | break; |
| 275 | bn = be64_to_cpu(*dataptrs); |
| 276 | |
| 277 | if (bstart + blen == bn) |
| 278 | blen++; |
| 279 | else { |
| 280 | if (bstart) |
| 281 | gfs2_free_meta(ip, bstart, blen); |
| 282 | bstart = bn; |
| 283 | blen = 1; |
| 284 | } |
| 285 | |
| 286 | *dataptrs = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 287 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 288 | } |
| 289 | if (bstart) |
| 290 | gfs2_free_meta(ip, bstart, blen); |
| 291 | |
| 292 | if (prev && !leave) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 293 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 294 | |
| 295 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 296 | prev->ea_rec_len = cpu_to_be32(len); |
| 297 | |
| 298 | if (GFS2_EA_IS_LAST(ea)) |
| 299 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 300 | } else { |
| 301 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 302 | ea->ea_num_ptrs = 0; |
| 303 | } |
| 304 | |
| 305 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 306 | if (!error) { |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 307 | ip->i_inode.i_ctime = CURRENT_TIME; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 308 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 309 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 310 | brelse(dibh); |
| 311 | } |
| 312 | |
| 313 | gfs2_trans_end(sdp); |
| 314 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 315 | out_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 316 | gfs2_glock_dq_uninit(&rg_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 317 | return error; |
| 318 | } |
| 319 | |
| 320 | static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh, |
| 321 | struct gfs2_ea_header *ea, |
| 322 | struct gfs2_ea_header *prev, int leave) |
| 323 | { |
| 324 | struct gfs2_alloc *al; |
| 325 | int error; |
| 326 | |
| 327 | al = gfs2_alloc_get(ip); |
Cyrill Gorcunov | 182fe5a | 2008-03-03 21:54:21 +0300 | [diff] [blame] | 328 | if (!al) |
| 329 | return -ENOMEM; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 330 | |
| 331 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 332 | if (error) |
| 333 | goto out_alloc; |
| 334 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 335 | error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 336 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 337 | gfs2_quota_unhold(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 338 | out_alloc: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 339 | gfs2_alloc_put(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 340 | return error; |
| 341 | } |
| 342 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 343 | struct ea_list { |
| 344 | struct gfs2_ea_request *ei_er; |
| 345 | unsigned int ei_size; |
| 346 | }; |
| 347 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 348 | static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea) |
| 349 | { |
| 350 | switch (ea->ea_type) { |
| 351 | case GFS2_EATYPE_USR: |
| 352 | return 5 + ea->ea_name_len + 1; |
| 353 | case GFS2_EATYPE_SYS: |
| 354 | return 7 + ea->ea_name_len + 1; |
| 355 | case GFS2_EATYPE_SECURITY: |
| 356 | return 9 + ea->ea_name_len + 1; |
| 357 | default: |
| 358 | return 0; |
| 359 | } |
| 360 | } |
| 361 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 362 | static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh, |
| 363 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 364 | void *private) |
| 365 | { |
| 366 | struct ea_list *ei = private; |
| 367 | struct gfs2_ea_request *er = ei->ei_er; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 368 | unsigned int ea_size = gfs2_ea_strlen(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 369 | |
| 370 | if (ea->ea_type == GFS2_EATYPE_UNUSED) |
| 371 | return 0; |
| 372 | |
| 373 | if (er->er_data_len) { |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 374 | char *prefix = NULL; |
| 375 | unsigned int l = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 376 | char c = 0; |
| 377 | |
| 378 | if (ei->ei_size + ea_size > er->er_data_len) |
| 379 | return -ERANGE; |
| 380 | |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 381 | switch (ea->ea_type) { |
| 382 | case GFS2_EATYPE_USR: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 383 | prefix = "user."; |
| 384 | l = 5; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 385 | break; |
| 386 | case GFS2_EATYPE_SYS: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 387 | prefix = "system."; |
| 388 | l = 7; |
Ryan O'Hara | 639b6d7 | 2006-05-22 10:08:35 -0400 | [diff] [blame] | 389 | break; |
| 390 | case GFS2_EATYPE_SECURITY: |
| 391 | prefix = "security."; |
| 392 | l = 9; |
| 393 | break; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 394 | } |
| 395 | |
Steven Whitehouse | 01eb7c0 | 2006-06-06 17:31:30 -0400 | [diff] [blame] | 396 | BUG_ON(l == 0); |
| 397 | |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 398 | memcpy(er->er_data + ei->ei_size, prefix, l); |
| 399 | memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 400 | ea->ea_name_len); |
Steven Whitehouse | 90cdd20 | 2006-05-22 10:36:25 -0400 | [diff] [blame] | 401 | memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | ei->ei_size += ea_size; |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | /** |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 410 | * gfs2_listxattr - List gfs2 extended attributes |
| 411 | * @dentry: The dentry whose inode we are interested in |
| 412 | * @buffer: The buffer to write the results |
| 413 | * @size: The size of the buffer |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 414 | * |
| 415 | * Returns: actual size of data on success, -errno on error |
| 416 | */ |
| 417 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 418 | ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 419 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 420 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
| 421 | struct gfs2_ea_request er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 422 | struct gfs2_holder i_gh; |
| 423 | int error; |
| 424 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 425 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 426 | if (size) { |
| 427 | er.er_data = buffer; |
| 428 | er.er_data_len = size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 429 | } |
| 430 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 431 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 432 | if (error) |
| 433 | return error; |
| 434 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 435 | if (ip->i_eattr) { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 436 | struct ea_list ei = { .ei_er = &er, .ei_size = 0 }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 437 | |
| 438 | error = ea_foreach(ip, ea_list_i, &ei); |
| 439 | if (!error) |
| 440 | error = ei.ei_size; |
| 441 | } |
| 442 | |
| 443 | gfs2_glock_dq_uninit(&i_gh); |
| 444 | |
| 445 | return error; |
| 446 | } |
| 447 | |
| 448 | /** |
| 449 | * ea_get_unstuffed - actually copies the unstuffed data into the |
| 450 | * request buffer |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 451 | * @ip: The GFS2 inode |
| 452 | * @ea: The extended attribute header structure |
| 453 | * @data: The data to be copied |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 454 | * |
| 455 | * Returns: errno |
| 456 | */ |
| 457 | |
| 458 | static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 459 | char *data) |
| 460 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 461 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 462 | struct buffer_head **bh; |
| 463 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 464 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 465 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | unsigned int x; |
| 467 | int error = 0; |
| 468 | |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 469 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 470 | if (!bh) |
| 471 | return -ENOMEM; |
| 472 | |
| 473 | for (x = 0; x < nptrs; x++) { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 474 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, |
| 475 | bh + x); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 476 | if (error) { |
| 477 | while (x--) |
| 478 | brelse(bh[x]); |
| 479 | goto out; |
| 480 | } |
| 481 | dataptrs++; |
| 482 | } |
| 483 | |
| 484 | for (x = 0; x < nptrs; x++) { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 485 | error = gfs2_meta_wait(sdp, bh[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 486 | if (error) { |
| 487 | for (; x < nptrs; x++) |
| 488 | brelse(bh[x]); |
| 489 | goto out; |
| 490 | } |
| 491 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| 492 | for (; x < nptrs; x++) |
| 493 | brelse(bh[x]); |
| 494 | error = -EIO; |
| 495 | goto out; |
| 496 | } |
| 497 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 498 | memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 499 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
| 500 | |
| 501 | amount -= sdp->sd_jbsize; |
| 502 | data += sdp->sd_jbsize; |
| 503 | |
| 504 | brelse(bh[x]); |
| 505 | } |
| 506 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 507 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 508 | kfree(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 509 | return error; |
| 510 | } |
| 511 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 512 | static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el, |
| 513 | char *data, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 514 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 515 | int ret; |
| 516 | size_t len = GFS2_EA_DATA_LEN(el->el_ea); |
| 517 | if (len > size) |
| 518 | return -ERANGE; |
| 519 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 520 | if (GFS2_EA_IS_STUFFED(el->el_ea)) { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 521 | memcpy(data, GFS2_EA2DATA(el->el_ea), len); |
| 522 | return len; |
| 523 | } |
| 524 | ret = ea_get_unstuffed(ip, el->el_ea, data); |
| 525 | if (ret < 0) |
| 526 | return ret; |
| 527 | return len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 528 | } |
| 529 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 530 | int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata) |
| 531 | { |
| 532 | struct gfs2_ea_location el; |
| 533 | int error; |
| 534 | int len; |
| 535 | char *data; |
| 536 | |
| 537 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el); |
| 538 | if (error) |
| 539 | return error; |
| 540 | if (!el.el_ea) |
| 541 | goto out; |
| 542 | if (!GFS2_EA_DATA_LEN(el.el_ea)) |
| 543 | goto out; |
| 544 | |
| 545 | len = GFS2_EA_DATA_LEN(el.el_ea); |
| 546 | data = kmalloc(len, GFP_NOFS); |
| 547 | error = -ENOMEM; |
| 548 | if (data == NULL) |
| 549 | goto out; |
| 550 | |
| 551 | error = gfs2_ea_get_copy(ip, &el, data, len); |
| 552 | if (error == 0) |
| 553 | error = len; |
| 554 | *ppdata = data; |
| 555 | out: |
| 556 | brelse(el.el_bh); |
| 557 | return error; |
| 558 | } |
| 559 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 560 | /** |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 561 | * gfs2_xattr_get - Get a GFS2 extended attribute |
| 562 | * @inode: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 563 | * @name: The name of the extended attribute |
| 564 | * @buffer: The buffer to write the result into |
| 565 | * @size: The size of the buffer |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 566 | * @type: The type of extended attribute |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 567 | * |
| 568 | * Returns: actual size of data on success, -errno on error |
| 569 | */ |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 570 | static int gfs2_xattr_get(struct dentry *dentry, const char *name, |
| 571 | void *buffer, size_t size, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 572 | { |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 573 | struct gfs2_inode *ip = GFS2_I(dentry->d_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 574 | struct gfs2_ea_location el; |
| 575 | int error; |
| 576 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 577 | if (!ip->i_eattr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 578 | return -ENODATA; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 579 | if (strlen(name) > GFS2_EA_MAX_NAME_LEN) |
| 580 | return -EINVAL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 581 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 582 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 583 | if (error) |
| 584 | return error; |
| 585 | if (!el.el_ea) |
| 586 | return -ENODATA; |
Steven Whitehouse | 86d0063 | 2009-09-14 09:50:57 +0100 | [diff] [blame] | 587 | if (size) |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 588 | error = gfs2_ea_get_copy(ip, &el, buffer, size); |
| 589 | else |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 590 | error = GFS2_EA_DATA_LEN(el.el_ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 591 | brelse(el.el_bh); |
| 592 | |
| 593 | return error; |
| 594 | } |
| 595 | |
| 596 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 597 | * ea_alloc_blk - allocates a new block for extended attributes. |
| 598 | * @ip: A pointer to the inode that's getting extended attributes |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 599 | * @bhp: Pointer to pointer to a struct buffer_head |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 600 | * |
| 601 | * Returns: errno |
| 602 | */ |
| 603 | |
| 604 | static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp) |
| 605 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 606 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 607 | struct gfs2_ea_header *ea; |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 608 | unsigned int n = 1; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 609 | u64 block; |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 610 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 611 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 612 | error = gfs2_alloc_block(ip, &block, &n); |
| 613 | if (error) |
| 614 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 615 | gfs2_trans_add_unrevoke(sdp, block, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 616 | *bhp = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 617 | gfs2_trans_add_bh(ip->i_gl, *bhp, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 618 | gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA); |
| 619 | gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header)); |
| 620 | |
| 621 | ea = GFS2_EA_BH2FIRST(*bhp); |
| 622 | ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize); |
| 623 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 624 | ea->ea_flags = GFS2_EAFLAG_LAST; |
| 625 | ea->ea_num_ptrs = 0; |
| 626 | |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 627 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 628 | |
| 629 | return 0; |
| 630 | } |
| 631 | |
| 632 | /** |
| 633 | * ea_write - writes the request info to an ea, creating new blocks if |
| 634 | * necessary |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 635 | * @ip: inode that is being modified |
| 636 | * @ea: the location of the new ea in a block |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 637 | * @er: the write request |
| 638 | * |
| 639 | * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags |
| 640 | * |
| 641 | * returns : errno |
| 642 | */ |
| 643 | |
| 644 | static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea, |
| 645 | struct gfs2_ea_request *er) |
| 646 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 647 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 648 | int error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 649 | |
| 650 | ea->ea_data_len = cpu_to_be32(er->er_data_len); |
| 651 | ea->ea_name_len = er->er_name_len; |
| 652 | ea->ea_type = er->er_type; |
| 653 | ea->__pad = 0; |
| 654 | |
| 655 | memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len); |
| 656 | |
| 657 | if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) { |
| 658 | ea->ea_num_ptrs = 0; |
| 659 | memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len); |
| 660 | } else { |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 661 | __be64 *dataptr = GFS2_EA2DATAPTRS(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 662 | const char *data = er->er_data; |
| 663 | unsigned int data_len = er->er_data_len; |
| 664 | unsigned int copy; |
| 665 | unsigned int x; |
| 666 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 667 | ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 668 | for (x = 0; x < ea->ea_num_ptrs; x++) { |
| 669 | struct buffer_head *bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 670 | u64 block; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 671 | int mh_size = sizeof(struct gfs2_meta_header); |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 672 | unsigned int n = 1; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 673 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 674 | error = gfs2_alloc_block(ip, &block, &n); |
| 675 | if (error) |
| 676 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 677 | gfs2_trans_add_unrevoke(sdp, block, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 678 | bh = gfs2_meta_new(ip->i_gl, block); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 679 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 680 | gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED); |
| 681 | |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 682 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 683 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 684 | copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize : |
| 685 | data_len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 686 | memcpy(bh->b_data + mh_size, data, copy); |
| 687 | if (copy < sdp->sd_jbsize) |
| 688 | memset(bh->b_data + mh_size + copy, 0, |
| 689 | sdp->sd_jbsize - copy); |
| 690 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 691 | *dataptr++ = cpu_to_be64(bh->b_blocknr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 692 | data += copy; |
| 693 | data_len -= copy; |
| 694 | |
| 695 | brelse(bh); |
| 696 | } |
| 697 | |
| 698 | gfs2_assert_withdraw(sdp, !data_len); |
| 699 | } |
| 700 | |
| 701 | return 0; |
| 702 | } |
| 703 | |
| 704 | typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 705 | struct gfs2_ea_request *er, void *private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 706 | |
| 707 | static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 708 | unsigned int blks, |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 709 | ea_skeleton_call_t skeleton_call, void *private) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 710 | { |
| 711 | struct gfs2_alloc *al; |
| 712 | struct buffer_head *dibh; |
| 713 | int error; |
| 714 | |
| 715 | al = gfs2_alloc_get(ip); |
Cyrill Gorcunov | 182fe5a | 2008-03-03 21:54:21 +0300 | [diff] [blame] | 716 | if (!al) |
| 717 | return -ENOMEM; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 718 | |
Steven Whitehouse | d82661d | 2008-03-10 15:34:50 +0000 | [diff] [blame] | 719 | error = gfs2_quota_lock_check(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 720 | if (error) |
| 721 | goto out; |
| 722 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 723 | al->al_requested = blks; |
| 724 | |
| 725 | error = gfs2_inplace_reserve(ip); |
| 726 | if (error) |
| 727 | goto out_gunlock_q; |
| 728 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 729 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), |
Steven Whitehouse | 54335b1 | 2011-09-01 13:31:59 +0100 | [diff] [blame^] | 730 | blks + gfs2_rg_blocks(ip) + |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 731 | RES_DINODE + RES_STATFS + RES_QUOTA, 0); |
| 732 | if (error) |
| 733 | goto out_ipres; |
| 734 | |
| 735 | error = skeleton_call(ip, er, private); |
| 736 | if (error) |
| 737 | goto out_end_trans; |
| 738 | |
| 739 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 740 | if (!error) { |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 741 | ip->i_inode.i_ctime = CURRENT_TIME; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 742 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 743 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 744 | brelse(dibh); |
| 745 | } |
| 746 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 747 | out_end_trans: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 748 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 749 | out_ipres: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 750 | gfs2_inplace_release(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 751 | out_gunlock_q: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 752 | gfs2_quota_unlock(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 753 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 754 | gfs2_alloc_put(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 755 | return error; |
| 756 | } |
| 757 | |
| 758 | static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 759 | void *private) |
| 760 | { |
| 761 | struct buffer_head *bh; |
| 762 | int error; |
| 763 | |
| 764 | error = ea_alloc_blk(ip, &bh); |
| 765 | if (error) |
| 766 | return error; |
| 767 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 768 | ip->i_eattr = bh->b_blocknr; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 769 | error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er); |
| 770 | |
| 771 | brelse(bh); |
| 772 | |
| 773 | return error; |
| 774 | } |
| 775 | |
| 776 | /** |
| 777 | * ea_init - initializes a new eattr block |
| 778 | * @ip: |
| 779 | * @er: |
| 780 | * |
| 781 | * Returns: errno |
| 782 | */ |
| 783 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 784 | static int ea_init(struct gfs2_inode *ip, int type, const char *name, |
| 785 | const void *data, size_t size) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 786 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 787 | struct gfs2_ea_request er; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 788 | unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 789 | unsigned int blks = 1; |
| 790 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 791 | er.er_type = type; |
| 792 | er.er_name = name; |
| 793 | er.er_name_len = strlen(name); |
| 794 | er.er_data = (void *)data; |
| 795 | er.er_data_len = size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 796 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 797 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize) |
| 798 | blks += DIV_ROUND_UP(er.er_data_len, jbsize); |
| 799 | |
| 800 | return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea) |
| 804 | { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 805 | u32 ea_size = GFS2_EA_SIZE(ea); |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 806 | struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + |
| 807 | ea_size); |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 808 | u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 809 | int last = ea->ea_flags & GFS2_EAFLAG_LAST; |
| 810 | |
| 811 | ea->ea_rec_len = cpu_to_be32(ea_size); |
| 812 | ea->ea_flags ^= last; |
| 813 | |
| 814 | new->ea_rec_len = cpu_to_be32(new_size); |
| 815 | new->ea_flags = last; |
| 816 | |
| 817 | return new; |
| 818 | } |
| 819 | |
| 820 | static void ea_set_remove_stuffed(struct gfs2_inode *ip, |
| 821 | struct gfs2_ea_location *el) |
| 822 | { |
| 823 | struct gfs2_ea_header *ea = el->el_ea; |
| 824 | struct gfs2_ea_header *prev = el->el_prev; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 825 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 826 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 827 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 828 | |
| 829 | if (!prev || !GFS2_EA_IS_STUFFED(ea)) { |
| 830 | ea->ea_type = GFS2_EATYPE_UNUSED; |
| 831 | return; |
| 832 | } else if (GFS2_EA2NEXT(prev) != ea) { |
| 833 | prev = GFS2_EA2NEXT(prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 834 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 838 | prev->ea_rec_len = cpu_to_be32(len); |
| 839 | |
| 840 | if (GFS2_EA_IS_LAST(ea)) |
| 841 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
| 842 | } |
| 843 | |
| 844 | struct ea_set { |
| 845 | int ea_split; |
| 846 | |
| 847 | struct gfs2_ea_request *es_er; |
| 848 | struct gfs2_ea_location *es_el; |
| 849 | |
| 850 | struct buffer_head *es_bh; |
| 851 | struct gfs2_ea_header *es_ea; |
| 852 | }; |
| 853 | |
| 854 | static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh, |
| 855 | struct gfs2_ea_header *ea, struct ea_set *es) |
| 856 | { |
| 857 | struct gfs2_ea_request *er = es->es_er; |
| 858 | struct buffer_head *dibh; |
| 859 | int error; |
| 860 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 861 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 862 | if (error) |
| 863 | return error; |
| 864 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 865 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 866 | |
| 867 | if (es->ea_split) |
| 868 | ea = ea_split_ea(ea); |
| 869 | |
| 870 | ea_write(ip, ea, er); |
| 871 | |
| 872 | if (es->es_el) |
| 873 | ea_set_remove_stuffed(ip, es->es_el); |
| 874 | |
| 875 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 876 | if (error) |
| 877 | goto out; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 878 | ip->i_inode.i_ctime = CURRENT_TIME; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 879 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 880 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 881 | brelse(dibh); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 882 | out: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 883 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 884 | return error; |
| 885 | } |
| 886 | |
| 887 | static int ea_set_simple_alloc(struct gfs2_inode *ip, |
| 888 | struct gfs2_ea_request *er, void *private) |
| 889 | { |
| 890 | struct ea_set *es = private; |
| 891 | struct gfs2_ea_header *ea = es->es_ea; |
| 892 | int error; |
| 893 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 894 | gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 895 | |
| 896 | if (es->ea_split) |
| 897 | ea = ea_split_ea(ea); |
| 898 | |
| 899 | error = ea_write(ip, ea, er); |
| 900 | if (error) |
| 901 | return error; |
| 902 | |
| 903 | if (es->es_el) |
| 904 | ea_set_remove_stuffed(ip, es->es_el); |
| 905 | |
| 906 | return 0; |
| 907 | } |
| 908 | |
| 909 | static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh, |
| 910 | struct gfs2_ea_header *ea, struct gfs2_ea_header *prev, |
| 911 | void *private) |
| 912 | { |
| 913 | struct ea_set *es = private; |
| 914 | unsigned int size; |
| 915 | int stuffed; |
| 916 | int error; |
| 917 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 918 | stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len, |
| 919 | es->es_er->er_data_len, &size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 920 | |
| 921 | if (ea->ea_type == GFS2_EATYPE_UNUSED) { |
| 922 | if (GFS2_EA_REC_LEN(ea) < size) |
| 923 | return 0; |
| 924 | if (!GFS2_EA_IS_STUFFED(ea)) { |
| 925 | error = ea_remove_unstuffed(ip, bh, ea, prev, 1); |
| 926 | if (error) |
| 927 | return error; |
| 928 | } |
| 929 | es->ea_split = 0; |
| 930 | } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size) |
| 931 | es->ea_split = 1; |
| 932 | else |
| 933 | return 0; |
| 934 | |
| 935 | if (stuffed) { |
| 936 | error = ea_set_simple_noalloc(ip, bh, ea, es); |
| 937 | if (error) |
| 938 | return error; |
| 939 | } else { |
| 940 | unsigned int blks; |
| 941 | |
| 942 | es->es_bh = bh; |
| 943 | es->es_ea = ea; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 944 | blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len, |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 945 | GFS2_SB(&ip->i_inode)->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 946 | |
| 947 | error = ea_alloc_skeleton(ip, es->es_er, blks, |
| 948 | ea_set_simple_alloc, es); |
| 949 | if (error) |
| 950 | return error; |
| 951 | } |
| 952 | |
| 953 | return 1; |
| 954 | } |
| 955 | |
| 956 | static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er, |
| 957 | void *private) |
| 958 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 959 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 960 | struct buffer_head *indbh, *newbh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 961 | __be64 *eablk; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 962 | int error; |
| 963 | int mh_size = sizeof(struct gfs2_meta_header); |
| 964 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 965 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 966 | __be64 *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 967 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 968 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 969 | &indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 970 | if (error) |
| 971 | return error; |
| 972 | |
| 973 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 974 | error = -EIO; |
| 975 | goto out; |
| 976 | } |
| 977 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 978 | eablk = (__be64 *)(indbh->b_data + mh_size); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 979 | end = eablk + sdp->sd_inptrs; |
| 980 | |
| 981 | for (; eablk < end; eablk++) |
| 982 | if (!*eablk) |
| 983 | break; |
| 984 | |
| 985 | if (eablk == end) { |
| 986 | error = -ENOSPC; |
| 987 | goto out; |
| 988 | } |
| 989 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 990 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 991 | } else { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 992 | u64 blk; |
Steven Whitehouse | b45e41d | 2008-02-06 10:11:15 +0000 | [diff] [blame] | 993 | unsigned int n = 1; |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 994 | error = gfs2_alloc_block(ip, &blk, &n); |
| 995 | if (error) |
| 996 | return error; |
Steven Whitehouse | 5731be5 | 2008-02-01 13:16:55 +0000 | [diff] [blame] | 997 | gfs2_trans_add_unrevoke(sdp, blk, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 998 | indbh = gfs2_meta_new(ip->i_gl, blk); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 999 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1000 | gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN); |
| 1001 | gfs2_buffer_clear_tail(indbh, mh_size); |
| 1002 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1003 | eablk = (__be64 *)(indbh->b_data + mh_size); |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1004 | *eablk = cpu_to_be64(ip->i_eattr); |
| 1005 | ip->i_eattr = blk; |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1006 | ip->i_diskflags |= GFS2_DIF_EA_INDIRECT; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1007 | gfs2_add_inode_blocks(&ip->i_inode, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1008 | |
| 1009 | eablk++; |
| 1010 | } |
| 1011 | |
| 1012 | error = ea_alloc_blk(ip, &newbh); |
| 1013 | if (error) |
| 1014 | goto out; |
| 1015 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1016 | *eablk = cpu_to_be64((u64)newbh->b_blocknr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1017 | error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er); |
| 1018 | brelse(newbh); |
| 1019 | if (error) |
| 1020 | goto out; |
| 1021 | |
| 1022 | if (private) |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1023 | ea_set_remove_stuffed(ip, private); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1024 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1025 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1026 | brelse(indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1027 | return error; |
| 1028 | } |
| 1029 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1030 | static int ea_set_i(struct gfs2_inode *ip, int type, const char *name, |
| 1031 | const void *value, size_t size, struct gfs2_ea_location *el) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1032 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1033 | struct gfs2_ea_request er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1034 | struct ea_set es; |
| 1035 | unsigned int blks = 2; |
| 1036 | int error; |
| 1037 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1038 | er.er_type = type; |
| 1039 | er.er_name = name; |
| 1040 | er.er_data = (void *)value; |
| 1041 | er.er_name_len = strlen(name); |
| 1042 | er.er_data_len = size; |
| 1043 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1044 | memset(&es, 0, sizeof(struct ea_set)); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1045 | es.es_er = &er; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1046 | es.es_el = el; |
| 1047 | |
| 1048 | error = ea_foreach(ip, ea_set_simple, &es); |
| 1049 | if (error > 0) |
| 1050 | return 0; |
| 1051 | if (error) |
| 1052 | return error; |
| 1053 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1054 | if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1055 | blks++; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1056 | if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize) |
| 1057 | blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1058 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1059 | return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | static int ea_set_remove_unstuffed(struct gfs2_inode *ip, |
| 1063 | struct gfs2_ea_location *el) |
| 1064 | { |
| 1065 | if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) { |
| 1066 | el->el_prev = GFS2_EA2NEXT(el->el_prev); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1067 | gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1068 | GFS2_EA2NEXT(el->el_prev) == el->el_ea); |
| 1069 | } |
| 1070 | |
Steven Whitehouse | 86d0063 | 2009-09-14 09:50:57 +0100 | [diff] [blame] | 1071 | return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1072 | } |
| 1073 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1074 | static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el) |
| 1075 | { |
| 1076 | struct gfs2_ea_header *ea = el->el_ea; |
| 1077 | struct gfs2_ea_header *prev = el->el_prev; |
| 1078 | struct buffer_head *dibh; |
| 1079 | int error; |
| 1080 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1081 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1082 | if (error) |
| 1083 | return error; |
| 1084 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1085 | gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1086 | |
| 1087 | if (prev) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1088 | u32 len; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1089 | |
| 1090 | len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea); |
| 1091 | prev->ea_rec_len = cpu_to_be32(len); |
| 1092 | |
| 1093 | if (GFS2_EA_IS_LAST(ea)) |
| 1094 | prev->ea_flags |= GFS2_EAFLAG_LAST; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1095 | } else { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1096 | ea->ea_type = GFS2_EATYPE_UNUSED; |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1097 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1098 | |
| 1099 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1100 | if (!error) { |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1101 | ip->i_inode.i_ctime = CURRENT_TIME; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1102 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1103 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1104 | brelse(dibh); |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 1105 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1106 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1107 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1108 | |
| 1109 | return error; |
| 1110 | } |
| 1111 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1112 | /** |
| 1113 | * gfs2_xattr_remove - Remove a GFS2 extended attribute |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1114 | * @ip: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1115 | * @type: The type of the extended attribute |
| 1116 | * @name: The name of the extended attribute |
| 1117 | * |
| 1118 | * This is not called directly by the VFS since we use the (common) |
| 1119 | * scheme of making a "set with NULL data" mean a remove request. Note |
| 1120 | * that this is different from a set with zero length data. |
| 1121 | * |
| 1122 | * Returns: 0, or errno on failure |
| 1123 | */ |
| 1124 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1125 | static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1126 | { |
| 1127 | struct gfs2_ea_location el; |
| 1128 | int error; |
| 1129 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1130 | if (!ip->i_eattr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1131 | return -ENODATA; |
| 1132 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1133 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1134 | if (error) |
| 1135 | return error; |
| 1136 | if (!el.el_ea) |
| 1137 | return -ENODATA; |
| 1138 | |
| 1139 | if (GFS2_EA_IS_STUFFED(el.el_ea)) |
| 1140 | error = ea_remove_stuffed(ip, &el); |
| 1141 | else |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1142 | error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1143 | |
| 1144 | brelse(el.el_bh); |
| 1145 | |
| 1146 | return error; |
| 1147 | } |
| 1148 | |
| 1149 | /** |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1150 | * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute |
| 1151 | * @ip: The inode |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1152 | * @name: The name of the extended attribute |
| 1153 | * @value: The value of the extended attribute (NULL for remove) |
| 1154 | * @size: The size of the @value argument |
| 1155 | * @flags: Create or Replace |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1156 | * @type: The type of the extended attribute |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1157 | * |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1158 | * See gfs2_xattr_remove() for details of the removal of xattrs. |
| 1159 | * |
| 1160 | * Returns: 0 or errno on failure |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1161 | */ |
| 1162 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1163 | int __gfs2_xattr_set(struct inode *inode, const char *name, |
| 1164 | const void *value, size_t size, int flags, int type) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1165 | { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1166 | struct gfs2_inode *ip = GFS2_I(inode); |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1167 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1168 | struct gfs2_ea_location el; |
| 1169 | unsigned int namel = strlen(name); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1170 | int error; |
| 1171 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1172 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 1173 | return -EPERM; |
| 1174 | if (namel > GFS2_EA_MAX_NAME_LEN) |
| 1175 | return -ERANGE; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1176 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1177 | if (value == NULL) |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1178 | return gfs2_xattr_remove(ip, type, name); |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1179 | |
| 1180 | if (ea_check_size(sdp, namel, size)) |
| 1181 | return -ERANGE; |
| 1182 | |
| 1183 | if (!ip->i_eattr) { |
| 1184 | if (flags & XATTR_REPLACE) |
| 1185 | return -ENODATA; |
| 1186 | return ea_init(ip, type, name, value, size); |
| 1187 | } |
| 1188 | |
| 1189 | error = gfs2_ea_find(ip, type, name, &el); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1190 | if (error) |
| 1191 | return error; |
| 1192 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1193 | if (el.el_ea) { |
| 1194 | if (ip->i_diskflags & GFS2_DIF_APPENDONLY) { |
| 1195 | brelse(el.el_bh); |
| 1196 | return -EPERM; |
| 1197 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1198 | |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1199 | error = -EEXIST; |
| 1200 | if (!(flags & XATTR_CREATE)) { |
| 1201 | int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea); |
| 1202 | error = ea_set_i(ip, type, name, value, size, &el); |
| 1203 | if (!error && unstuffed) |
| 1204 | ea_set_remove_unstuffed(ip, &el); |
| 1205 | } |
| 1206 | |
| 1207 | brelse(el.el_bh); |
| 1208 | return error; |
| 1209 | } |
| 1210 | |
| 1211 | error = -ENODATA; |
| 1212 | if (!(flags & XATTR_REPLACE)) |
| 1213 | error = ea_set_i(ip, type, name, value, size, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1214 | |
| 1215 | return error; |
| 1216 | } |
| 1217 | |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1218 | static int gfs2_xattr_set(struct dentry *dentry, const char *name, |
| 1219 | const void *value, size_t size, int flags, int type) |
| 1220 | { |
| 1221 | return __gfs2_xattr_set(dentry->d_inode, name, value, |
| 1222 | size, flags, type); |
| 1223 | } |
| 1224 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1225 | static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip, |
| 1226 | struct gfs2_ea_header *ea, char *data) |
| 1227 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1228 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1229 | struct buffer_head **bh; |
| 1230 | unsigned int amount = GFS2_EA_DATA_LEN(ea); |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1231 | unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1232 | __be64 *dataptrs = GFS2_EA2DATAPTRS(ea); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1233 | unsigned int x; |
| 1234 | int error; |
| 1235 | |
Josef Bacik | 16c5f06 | 2008-04-09 09:33:41 -0400 | [diff] [blame] | 1236 | bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1237 | if (!bh) |
| 1238 | return -ENOMEM; |
| 1239 | |
| 1240 | error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0); |
| 1241 | if (error) |
| 1242 | goto out; |
| 1243 | |
| 1244 | for (x = 0; x < nptrs; x++) { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1245 | error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0, |
| 1246 | bh + x); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1247 | if (error) { |
| 1248 | while (x--) |
| 1249 | brelse(bh[x]); |
| 1250 | goto fail; |
| 1251 | } |
| 1252 | dataptrs++; |
| 1253 | } |
| 1254 | |
| 1255 | for (x = 0; x < nptrs; x++) { |
Steven Whitehouse | 7276b3b | 2006-09-21 17:05:23 -0400 | [diff] [blame] | 1256 | error = gfs2_meta_wait(sdp, bh[x]); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1257 | if (error) { |
| 1258 | for (; x < nptrs; x++) |
| 1259 | brelse(bh[x]); |
| 1260 | goto fail; |
| 1261 | } |
| 1262 | if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) { |
| 1263 | for (; x < nptrs; x++) |
| 1264 | brelse(bh[x]); |
| 1265 | error = -EIO; |
| 1266 | goto fail; |
| 1267 | } |
| 1268 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1269 | gfs2_trans_add_bh(ip->i_gl, bh[x], 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1270 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1271 | memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1272 | (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize); |
| 1273 | |
| 1274 | amount -= sdp->sd_jbsize; |
| 1275 | data += sdp->sd_jbsize; |
| 1276 | |
| 1277 | brelse(bh[x]); |
| 1278 | } |
| 1279 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1280 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1281 | kfree(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1282 | return error; |
| 1283 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1284 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1285 | gfs2_trans_end(sdp); |
| 1286 | kfree(bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1287 | return error; |
| 1288 | } |
| 1289 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 1290 | int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1291 | { |
Steven Whitehouse | ab9bbda | 2011-08-15 14:20:36 +0100 | [diff] [blame] | 1292 | struct inode *inode = &ip->i_inode; |
| 1293 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 1294 | struct gfs2_ea_location el; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1295 | int error; |
| 1296 | |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 1297 | error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el); |
| 1298 | if (error) |
| 1299 | return error; |
| 1300 | |
| 1301 | if (GFS2_EA_IS_STUFFED(el.el_ea)) { |
Steven Whitehouse | e412bdb | 2009-12-21 13:55:28 +0000 | [diff] [blame] | 1302 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0); |
| 1303 | if (error == 0) { |
| 1304 | gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1); |
| 1305 | memcpy(GFS2_EA2DATA(el.el_ea), data, |
| 1306 | GFS2_EA_DATA_LEN(el.el_ea)); |
| 1307 | } |
| 1308 | } else { |
Steven Whitehouse | 479c427 | 2009-10-02 12:00:00 +0100 | [diff] [blame] | 1309 | error = ea_acl_chmod_unstuffed(ip, el.el_ea, data); |
Steven Whitehouse | e412bdb | 2009-12-21 13:55:28 +0000 | [diff] [blame] | 1310 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1311 | |
Steven Whitehouse | e412bdb | 2009-12-21 13:55:28 +0000 | [diff] [blame] | 1312 | brelse(el.el_bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1313 | if (error) |
| 1314 | return error; |
| 1315 | |
Steven Whitehouse | ab9bbda | 2011-08-15 14:20:36 +0100 | [diff] [blame] | 1316 | error = gfs2_setattr_simple(inode, attr); |
Steven Whitehouse | e412bdb | 2009-12-21 13:55:28 +0000 | [diff] [blame] | 1317 | gfs2_trans_end(sdp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1318 | return error; |
| 1319 | } |
| 1320 | |
| 1321 | static int ea_dealloc_indirect(struct gfs2_inode *ip) |
| 1322 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1323 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1324 | struct gfs2_rgrp_list rlist; |
| 1325 | struct buffer_head *indbh, *dibh; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1326 | __be64 *eablk, *end; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1327 | unsigned int rg_blocks = 0; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1328 | u64 bstart = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1329 | unsigned int blen = 0; |
| 1330 | unsigned int blks = 0; |
| 1331 | unsigned int x; |
| 1332 | int error; |
| 1333 | |
| 1334 | memset(&rlist, 0, sizeof(struct gfs2_rgrp_list)); |
| 1335 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1336 | error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1337 | if (error) |
| 1338 | return error; |
| 1339 | |
| 1340 | if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) { |
| 1341 | error = -EIO; |
| 1342 | goto out; |
| 1343 | } |
| 1344 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1345 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1346 | end = eablk + sdp->sd_inptrs; |
| 1347 | |
| 1348 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1349 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1350 | |
| 1351 | if (!*eablk) |
| 1352 | break; |
| 1353 | bn = be64_to_cpu(*eablk); |
| 1354 | |
| 1355 | if (bstart + blen == bn) |
| 1356 | blen++; |
| 1357 | else { |
| 1358 | if (bstart) |
| 1359 | gfs2_rlist_add(sdp, &rlist, bstart); |
| 1360 | bstart = bn; |
| 1361 | blen = 1; |
| 1362 | } |
| 1363 | blks++; |
| 1364 | } |
| 1365 | if (bstart) |
| 1366 | gfs2_rlist_add(sdp, &rlist, bstart); |
| 1367 | else |
| 1368 | goto out; |
| 1369 | |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 1370 | gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1371 | |
| 1372 | for (x = 0; x < rlist.rl_rgrps; x++) { |
| 1373 | struct gfs2_rgrpd *rgd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1374 | rgd = rlist.rl_ghs[x].gh_gl->gl_object; |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1375 | rg_blocks += rgd->rd_length; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1376 | } |
| 1377 | |
| 1378 | error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs); |
| 1379 | if (error) |
| 1380 | goto out_rlist_free; |
| 1381 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1382 | error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT + |
| 1383 | RES_STATFS + RES_QUOTA, blks); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1384 | if (error) |
| 1385 | goto out_gunlock; |
| 1386 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1387 | gfs2_trans_add_bh(ip->i_gl, indbh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1388 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 1389 | eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1390 | bstart = 0; |
| 1391 | blen = 0; |
| 1392 | |
| 1393 | for (; eablk < end; eablk++) { |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 1394 | u64 bn; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1395 | |
| 1396 | if (!*eablk) |
| 1397 | break; |
| 1398 | bn = be64_to_cpu(*eablk); |
| 1399 | |
| 1400 | if (bstart + blen == bn) |
| 1401 | blen++; |
| 1402 | else { |
| 1403 | if (bstart) |
| 1404 | gfs2_free_meta(ip, bstart, blen); |
| 1405 | bstart = bn; |
| 1406 | blen = 1; |
| 1407 | } |
| 1408 | |
| 1409 | *eablk = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1410 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1411 | } |
| 1412 | if (bstart) |
| 1413 | gfs2_free_meta(ip, bstart, blen); |
| 1414 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1415 | ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1416 | |
| 1417 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1418 | if (!error) { |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1419 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1420 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1421 | brelse(dibh); |
| 1422 | } |
| 1423 | |
| 1424 | gfs2_trans_end(sdp); |
| 1425 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1426 | out_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1427 | gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1428 | out_rlist_free: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1429 | gfs2_rlist_free(&rlist); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1430 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1431 | brelse(indbh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1432 | return error; |
| 1433 | } |
| 1434 | |
| 1435 | static int ea_dealloc_block(struct gfs2_inode *ip) |
| 1436 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1437 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
Steven Whitehouse | 6dbd822 | 2008-01-10 15:18:55 +0000 | [diff] [blame] | 1438 | struct gfs2_alloc *al = ip->i_alloc; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1439 | struct gfs2_rgrpd *rgd; |
| 1440 | struct buffer_head *dibh; |
| 1441 | int error; |
| 1442 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1443 | rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1444 | if (!rgd) { |
| 1445 | gfs2_consist_inode(ip); |
| 1446 | return -EIO; |
| 1447 | } |
| 1448 | |
| 1449 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, |
| 1450 | &al->al_rgd_gh); |
| 1451 | if (error) |
| 1452 | return error; |
| 1453 | |
Steven Whitehouse | cca195c | 2006-09-05 13:15:18 -0400 | [diff] [blame] | 1454 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS + |
| 1455 | RES_QUOTA, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1456 | if (error) |
| 1457 | goto out_gunlock; |
| 1458 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1459 | gfs2_free_meta(ip, ip->i_eattr, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1460 | |
Steven Whitehouse | 3767ac2 | 2008-11-03 14:28:42 +0000 | [diff] [blame] | 1461 | ip->i_eattr = 0; |
Steven Whitehouse | 77658aa | 2008-02-12 14:17:27 +0000 | [diff] [blame] | 1462 | gfs2_add_inode_blocks(&ip->i_inode, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1463 | |
| 1464 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1465 | if (!error) { |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1466 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1467 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1468 | brelse(dibh); |
| 1469 | } |
| 1470 | |
| 1471 | gfs2_trans_end(sdp); |
| 1472 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1473 | out_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1474 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1475 | return error; |
| 1476 | } |
| 1477 | |
| 1478 | /** |
| 1479 | * gfs2_ea_dealloc - deallocate the extended attribute fork |
| 1480 | * @ip: the inode |
| 1481 | * |
| 1482 | * Returns: errno |
| 1483 | */ |
| 1484 | |
| 1485 | int gfs2_ea_dealloc(struct gfs2_inode *ip) |
| 1486 | { |
| 1487 | struct gfs2_alloc *al; |
| 1488 | int error; |
| 1489 | |
| 1490 | al = gfs2_alloc_get(ip); |
Cyrill Gorcunov | 182fe5a | 2008-03-03 21:54:21 +0300 | [diff] [blame] | 1491 | if (!al) |
| 1492 | return -ENOMEM; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1493 | |
| 1494 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 1495 | if (error) |
| 1496 | goto out_alloc; |
| 1497 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1498 | error = ea_foreach(ip, ea_dealloc_unstuffed, NULL); |
| 1499 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 1500 | goto out_quota; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1501 | |
Steven Whitehouse | 383f01f | 2008-11-04 10:05:22 +0000 | [diff] [blame] | 1502 | if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1503 | error = ea_dealloc_indirect(ip); |
| 1504 | if (error) |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 1505 | goto out_quota; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1506 | } |
| 1507 | |
| 1508 | error = ea_dealloc_block(ip); |
| 1509 | |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1510 | out_quota: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1511 | gfs2_quota_unhold(ip); |
Steven Whitehouse | a91ea69 | 2006-09-04 12:04:26 -0400 | [diff] [blame] | 1512 | out_alloc: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1513 | gfs2_alloc_put(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1514 | return error; |
| 1515 | } |
| 1516 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1517 | static const struct xattr_handler gfs2_xattr_user_handler = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1518 | .prefix = XATTR_USER_PREFIX, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1519 | .flags = GFS2_EATYPE_USR, |
| 1520 | .get = gfs2_xattr_get, |
| 1521 | .set = gfs2_xattr_set, |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1522 | }; |
| 1523 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1524 | static const struct xattr_handler gfs2_xattr_security_handler = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1525 | .prefix = XATTR_SECURITY_PREFIX, |
Christoph Hellwig | 431547b | 2009-11-13 09:52:56 +0000 | [diff] [blame] | 1526 | .flags = GFS2_EATYPE_SECURITY, |
| 1527 | .get = gfs2_xattr_get, |
| 1528 | .set = gfs2_xattr_set, |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1529 | }; |
| 1530 | |
Stephen Hemminger | b7bb0a1 | 2010-05-13 17:53:23 -0700 | [diff] [blame] | 1531 | const struct xattr_handler *gfs2_xattr_handlers[] = { |
Steven Whitehouse | 40b78a3 | 2009-08-26 18:41:32 +0100 | [diff] [blame] | 1532 | &gfs2_xattr_user_handler, |
| 1533 | &gfs2_xattr_security_handler, |
| 1534 | &gfs2_xattr_system_handler, |
| 1535 | NULL, |
| 1536 | }; |
| 1537 | |