Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/ufs/super.c |
| 3 | * |
| 4 | * Copyright (C) 1998 |
| 5 | * Daniel Pirkl <daniel.pirkl@email.cz> |
| 6 | * Charles University, Faculty of Mathematics and Physics |
| 7 | */ |
| 8 | |
| 9 | /* Derived from |
| 10 | * |
| 11 | * linux/fs/ext2/super.c |
| 12 | * |
| 13 | * Copyright (C) 1992, 1993, 1994, 1995 |
| 14 | * Remy Card (card@masi.ibp.fr) |
| 15 | * Laboratoire MASI - Institut Blaise Pascal |
| 16 | * Universite Pierre et Marie Curie (Paris VI) |
| 17 | * |
| 18 | * from |
| 19 | * |
| 20 | * linux/fs/minix/inode.c |
| 21 | * |
| 22 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 23 | * |
| 24 | * Big-endian to little-endian byte-swapping/bitmaps by |
| 25 | * David S. Miller (davem@caip.rutgers.edu), 1995 |
| 26 | */ |
| 27 | |
| 28 | /* |
| 29 | * Inspired by |
| 30 | * |
| 31 | * linux/fs/ufs/super.c |
| 32 | * |
| 33 | * Copyright (C) 1996 |
| 34 | * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) |
| 35 | * Laboratory for Computer Science Research Computing Facility |
| 36 | * Rutgers, The State University of New Jersey |
| 37 | * |
| 38 | * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) |
| 39 | * |
| 40 | * Kernel module support added on 96/04/26 by |
| 41 | * Stefan Reinauer <stepan@home.culture.mipt.ru> |
| 42 | * |
| 43 | * Module usage counts added on 96/04/29 by |
| 44 | * Gertjan van Wingerde <gertjan@cs.vu.nl> |
| 45 | * |
| 46 | * Clean swab support on 19970406 by |
| 47 | * Francois-Rene Rideau <fare@tunes.org> |
| 48 | * |
| 49 | * 4.4BSD (FreeBSD) support added on February 1st 1998 by |
| 50 | * Niels Kristian Bech Jensen <nkbj@image.dk> partially based |
| 51 | * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. |
| 52 | * |
| 53 | * NeXTstep support added on February 5th 1998 by |
| 54 | * Niels Kristian Bech Jensen <nkbj@image.dk>. |
| 55 | * |
| 56 | * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 |
| 57 | * |
| 58 | * HP/UX hfs filesystem support added by |
| 59 | * Martin K. Petersen <mkp@mkp.net>, August 1999 |
| 60 | * |
| 61 | * UFS2 (of FreeBSD 5.x) support added by |
| 62 | * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 |
| 63 | * |
| 64 | */ |
| 65 | |
| 66 | |
| 67 | #include <linux/config.h> |
| 68 | #include <linux/module.h> |
| 69 | #include <linux/bitops.h> |
| 70 | |
| 71 | #include <stdarg.h> |
| 72 | |
| 73 | #include <asm/uaccess.h> |
| 74 | #include <asm/system.h> |
| 75 | |
| 76 | #include <linux/errno.h> |
| 77 | #include <linux/fs.h> |
| 78 | #include <linux/ufs_fs.h> |
| 79 | #include <linux/slab.h> |
| 80 | #include <linux/time.h> |
| 81 | #include <linux/stat.h> |
| 82 | #include <linux/string.h> |
| 83 | #include <linux/blkdev.h> |
| 84 | #include <linux/init.h> |
| 85 | #include <linux/parser.h> |
| 86 | #include <linux/smp_lock.h> |
| 87 | #include <linux/buffer_head.h> |
| 88 | #include <linux/vfs.h> |
| 89 | |
| 90 | #include "swab.h" |
| 91 | #include "util.h" |
| 92 | |
| 93 | #undef UFS_SUPER_DEBUG |
| 94 | #undef UFS_SUPER_DEBUG_MORE |
| 95 | |
| 96 | |
| 97 | #undef UFS_SUPER_DEBUG_MORE |
| 98 | #ifdef UFS_SUPER_DEBUG |
| 99 | #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; |
| 100 | #else |
| 101 | #define UFSD(x) |
| 102 | #endif |
| 103 | |
| 104 | #ifdef UFS_SUPER_DEBUG_MORE |
| 105 | /* |
| 106 | * Print contents of ufs_super_block, useful for debugging |
| 107 | */ |
| 108 | void ufs_print_super_stuff(struct super_block *sb, |
| 109 | struct ufs_super_block_first * usb1, |
| 110 | struct ufs_super_block_second * usb2, |
| 111 | struct ufs_super_block_third * usb3) |
| 112 | { |
| 113 | printk("ufs_print_super_stuff\n"); |
| 114 | printk("size of usb: %u\n", sizeof(struct ufs_super_block)); |
| 115 | printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); |
| 116 | printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); |
| 117 | printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); |
| 118 | printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); |
| 119 | printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); |
| 120 | printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); |
| 121 | printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); |
| 122 | printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); |
| 123 | printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); |
| 124 | printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); |
| 125 | printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); |
| 126 | printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); |
| 127 | printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); |
| 128 | printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); |
| 129 | printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); |
| 130 | printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); |
| 131 | printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); |
| 132 | printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); |
| 133 | printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); |
| 134 | printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); |
| 135 | printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); |
| 136 | printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); |
| 137 | printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); |
| 138 | printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); |
| 139 | printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); |
| 140 | printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); |
| 141 | printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); |
| 142 | printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); |
| 143 | printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); |
| 144 | printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); |
| 145 | printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); |
| 146 | printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); |
| 147 | printk("\n"); |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Print contents of ufs2 ufs_super_block, useful for debugging |
| 152 | */ |
| 153 | void ufs2_print_super_stuff( |
| 154 | struct super_block *sb, |
| 155 | struct ufs_super_block *usb) |
| 156 | { |
| 157 | printk("ufs_print_super_stuff\n"); |
| 158 | printk("size of usb: %u\n", sizeof(struct ufs_super_block)); |
| 159 | printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic)); |
| 160 | printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size)); |
| 161 | printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize)); |
| 162 | printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize)); |
| 163 | printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize)); |
| 164 | printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname); |
| 165 | printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt); |
| 166 | printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb, |
| 167 | usb->fs_u11.fs_u2.fs_sblockloc)); |
| 168 | printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb, |
| 169 | usb->fs_u11.fs_u2.fs_cstotal.cs_ndir)); |
| 170 | printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb, |
| 171 | usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)); |
| 172 | printk("\n"); |
| 173 | } |
| 174 | |
| 175 | /* |
| 176 | * Print contents of ufs_cylinder_group, useful for debugging |
| 177 | */ |
| 178 | void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) |
| 179 | { |
| 180 | printk("\nufs_print_cylinder_stuff\n"); |
| 181 | printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); |
| 182 | printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); |
| 183 | printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); |
| 184 | printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); |
| 185 | printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); |
| 186 | printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); |
| 187 | printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); |
| 188 | printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); |
| 189 | printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); |
| 190 | printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); |
| 191 | printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); |
| 192 | printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); |
| 193 | printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); |
| 194 | printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); |
| 195 | printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", |
| 196 | fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), |
| 197 | fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), |
| 198 | fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), |
| 199 | fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); |
| 200 | printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); |
| 201 | printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); |
| 202 | printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); |
| 203 | printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); |
| 204 | printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); |
| 205 | printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); |
| 206 | printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); |
| 207 | printk(" nclusterblks %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); |
| 208 | printk("\n"); |
| 209 | } |
| 210 | #endif /* UFS_SUPER_DEBUG_MORE */ |
| 211 | |
| 212 | static struct super_operations ufs_super_ops; |
| 213 | |
| 214 | static char error_buf[1024]; |
| 215 | |
| 216 | void ufs_error (struct super_block * sb, const char * function, |
| 217 | const char * fmt, ...) |
| 218 | { |
| 219 | struct ufs_sb_private_info * uspi; |
| 220 | struct ufs_super_block_first * usb1; |
| 221 | va_list args; |
| 222 | |
| 223 | uspi = UFS_SB(sb)->s_uspi; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 224 | usb1 = ubh_get_usb_first(uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | |
| 226 | if (!(sb->s_flags & MS_RDONLY)) { |
| 227 | usb1->fs_clean = UFS_FSBAD; |
| 228 | ubh_mark_buffer_dirty(USPI_UBH); |
| 229 | sb->s_dirt = 1; |
| 230 | sb->s_flags |= MS_RDONLY; |
| 231 | } |
| 232 | va_start (args, fmt); |
| 233 | vsprintf (error_buf, fmt, args); |
| 234 | va_end (args); |
| 235 | switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { |
| 236 | case UFS_MOUNT_ONERROR_PANIC: |
| 237 | panic ("UFS-fs panic (device %s): %s: %s\n", |
| 238 | sb->s_id, function, error_buf); |
| 239 | |
| 240 | case UFS_MOUNT_ONERROR_LOCK: |
| 241 | case UFS_MOUNT_ONERROR_UMOUNT: |
| 242 | case UFS_MOUNT_ONERROR_REPAIR: |
| 243 | printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", |
| 244 | sb->s_id, function, error_buf); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | void ufs_panic (struct super_block * sb, const char * function, |
| 249 | const char * fmt, ...) |
| 250 | { |
| 251 | struct ufs_sb_private_info * uspi; |
| 252 | struct ufs_super_block_first * usb1; |
| 253 | va_list args; |
| 254 | |
| 255 | uspi = UFS_SB(sb)->s_uspi; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 256 | usb1 = ubh_get_usb_first(uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | if (!(sb->s_flags & MS_RDONLY)) { |
| 259 | usb1->fs_clean = UFS_FSBAD; |
| 260 | ubh_mark_buffer_dirty(USPI_UBH); |
| 261 | sb->s_dirt = 1; |
| 262 | } |
| 263 | va_start (args, fmt); |
| 264 | vsprintf (error_buf, fmt, args); |
| 265 | va_end (args); |
| 266 | sb->s_flags |= MS_RDONLY; |
| 267 | printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", |
| 268 | sb->s_id, function, error_buf); |
| 269 | } |
| 270 | |
| 271 | void ufs_warning (struct super_block * sb, const char * function, |
| 272 | const char * fmt, ...) |
| 273 | { |
| 274 | va_list args; |
| 275 | |
| 276 | va_start (args, fmt); |
| 277 | vsprintf (error_buf, fmt, args); |
| 278 | va_end (args); |
| 279 | printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", |
| 280 | sb->s_id, function, error_buf); |
| 281 | } |
| 282 | |
| 283 | enum { |
| 284 | Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, |
| 285 | Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, |
| 286 | Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, |
| 287 | Opt_onerror_umount, Opt_onerror_repair, Opt_err |
| 288 | }; |
| 289 | |
| 290 | static match_table_t tokens = { |
| 291 | {Opt_type_old, "ufstype=old"}, |
| 292 | {Opt_type_sunx86, "ufstype=sunx86"}, |
| 293 | {Opt_type_sun, "ufstype=sun"}, |
| 294 | {Opt_type_44bsd, "ufstype=44bsd"}, |
| 295 | {Opt_type_ufs2, "ufstype=ufs2"}, |
| 296 | {Opt_type_ufs2, "ufstype=5xbsd"}, |
| 297 | {Opt_type_hp, "ufstype=hp"}, |
| 298 | {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, |
| 299 | {Opt_type_nextstep, "ufstype=nextstep"}, |
| 300 | {Opt_type_openstep, "ufstype=openstep"}, |
| 301 | {Opt_onerror_panic, "onerror=panic"}, |
| 302 | {Opt_onerror_lock, "onerror=lock"}, |
| 303 | {Opt_onerror_umount, "onerror=umount"}, |
| 304 | {Opt_onerror_repair, "onerror=repair"}, |
| 305 | {Opt_err, NULL} |
| 306 | }; |
| 307 | |
| 308 | static int ufs_parse_options (char * options, unsigned * mount_options) |
| 309 | { |
| 310 | char * p; |
| 311 | |
| 312 | UFSD(("ENTER\n")) |
| 313 | |
| 314 | if (!options) |
| 315 | return 1; |
| 316 | |
| 317 | while ((p = strsep(&options, ",")) != NULL) { |
| 318 | substring_t args[MAX_OPT_ARGS]; |
| 319 | int token; |
| 320 | if (!*p) |
| 321 | continue; |
| 322 | |
| 323 | token = match_token(p, tokens, args); |
| 324 | switch (token) { |
| 325 | case Opt_type_old: |
| 326 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 327 | ufs_set_opt (*mount_options, UFSTYPE_OLD); |
| 328 | break; |
| 329 | case Opt_type_sunx86: |
| 330 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 331 | ufs_set_opt (*mount_options, UFSTYPE_SUNx86); |
| 332 | break; |
| 333 | case Opt_type_sun: |
| 334 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 335 | ufs_set_opt (*mount_options, UFSTYPE_SUN); |
| 336 | break; |
| 337 | case Opt_type_44bsd: |
| 338 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 339 | ufs_set_opt (*mount_options, UFSTYPE_44BSD); |
| 340 | break; |
| 341 | case Opt_type_ufs2: |
| 342 | ufs_clear_opt(*mount_options, UFSTYPE); |
| 343 | ufs_set_opt(*mount_options, UFSTYPE_UFS2); |
| 344 | break; |
| 345 | case Opt_type_hp: |
| 346 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 347 | ufs_set_opt (*mount_options, UFSTYPE_HP); |
| 348 | break; |
| 349 | case Opt_type_nextstepcd: |
| 350 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 351 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); |
| 352 | break; |
| 353 | case Opt_type_nextstep: |
| 354 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 355 | ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); |
| 356 | break; |
| 357 | case Opt_type_openstep: |
| 358 | ufs_clear_opt (*mount_options, UFSTYPE); |
| 359 | ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); |
| 360 | break; |
| 361 | case Opt_onerror_panic: |
| 362 | ufs_clear_opt (*mount_options, ONERROR); |
| 363 | ufs_set_opt (*mount_options, ONERROR_PANIC); |
| 364 | break; |
| 365 | case Opt_onerror_lock: |
| 366 | ufs_clear_opt (*mount_options, ONERROR); |
| 367 | ufs_set_opt (*mount_options, ONERROR_LOCK); |
| 368 | break; |
| 369 | case Opt_onerror_umount: |
| 370 | ufs_clear_opt (*mount_options, ONERROR); |
| 371 | ufs_set_opt (*mount_options, ONERROR_UMOUNT); |
| 372 | break; |
| 373 | case Opt_onerror_repair: |
| 374 | printk("UFS-fs: Unable to do repair on error, " |
| 375 | "will lock lock instead\n"); |
| 376 | ufs_clear_opt (*mount_options, ONERROR); |
| 377 | ufs_set_opt (*mount_options, ONERROR_REPAIR); |
| 378 | break; |
| 379 | default: |
| 380 | printk("UFS-fs: Invalid option: \"%s\" " |
| 381 | "or missing value\n", p); |
| 382 | return 0; |
| 383 | } |
| 384 | } |
| 385 | return 1; |
| 386 | } |
| 387 | |
| 388 | /* |
| 389 | * Read on-disk structures associated with cylinder groups |
| 390 | */ |
Evgeniy Dushistov | e295cfc | 2006-02-03 03:04:04 -0800 | [diff] [blame] | 391 | static int ufs_read_cylinder_structures (struct super_block *sb) |
| 392 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | struct ufs_sb_info * sbi = UFS_SB(sb); |
| 394 | struct ufs_sb_private_info * uspi; |
| 395 | struct ufs_super_block *usb; |
| 396 | struct ufs_buffer_head * ubh; |
| 397 | unsigned char * base, * space; |
| 398 | unsigned size, blks, i; |
| 399 | unsigned flags = 0; |
| 400 | |
| 401 | UFSD(("ENTER\n")) |
| 402 | |
| 403 | uspi = sbi->s_uspi; |
| 404 | |
| 405 | usb = (struct ufs_super_block *) |
| 406 | ((struct ufs_buffer_head *)uspi)->bh[0]->b_data; |
| 407 | |
| 408 | flags = UFS_SB(sb)->s_flags; |
| 409 | |
| 410 | /* |
| 411 | * Read cs structures from (usually) first data block |
| 412 | * on the device. |
| 413 | */ |
| 414 | size = uspi->s_cssize; |
| 415 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
| 416 | base = space = kmalloc(size, GFP_KERNEL); |
| 417 | if (!base) |
| 418 | goto failed; |
Evgeniy Dushistov | e295cfc | 2006-02-03 03:04:04 -0800 | [diff] [blame] | 419 | sbi->s_csp = (struct ufs_csum *)space; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | for (i = 0; i < blks; i += uspi->s_fpb) { |
| 421 | size = uspi->s_bsize; |
| 422 | if (i + uspi->s_fpb > blks) |
| 423 | size = (blks - i) * uspi->s_fsize; |
| 424 | |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 425 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | ubh = ubh_bread(sb, |
| 427 | fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size); |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 428 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 430 | |
| 431 | if (!ubh) |
| 432 | goto failed; |
| 433 | |
| 434 | ubh_ubhcpymem (space, ubh, size); |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 435 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | space += size; |
| 437 | ubh_brelse (ubh); |
| 438 | ubh = NULL; |
| 439 | } |
| 440 | |
| 441 | /* |
| 442 | * Read cylinder group (we read only first fragment from block |
| 443 | * at this time) and prepare internal data structures for cg caching. |
| 444 | */ |
| 445 | if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) |
| 446 | goto failed; |
| 447 | for (i = 0; i < uspi->s_ncg; i++) |
| 448 | sbi->s_ucg[i] = NULL; |
| 449 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
| 450 | sbi->s_ucpi[i] = NULL; |
| 451 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
| 452 | } |
| 453 | for (i = 0; i < uspi->s_ncg; i++) { |
| 454 | UFSD(("read cg %u\n", i)) |
| 455 | if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) |
| 456 | goto failed; |
| 457 | if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) |
| 458 | goto failed; |
| 459 | #ifdef UFS_SUPER_DEBUG_MORE |
| 460 | ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); |
| 461 | #endif |
| 462 | } |
| 463 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { |
| 464 | if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) |
| 465 | goto failed; |
| 466 | sbi->s_cgno[i] = UFS_CGNO_EMPTY; |
| 467 | } |
| 468 | sbi->s_cg_loaded = 0; |
| 469 | UFSD(("EXIT\n")) |
| 470 | return 1; |
| 471 | |
| 472 | failed: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 473 | kfree (base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | if (sbi->s_ucg) { |
| 475 | for (i = 0; i < uspi->s_ncg; i++) |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 476 | if (sbi->s_ucg[i]) |
| 477 | brelse (sbi->s_ucg[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | kfree (sbi->s_ucg); |
| 479 | for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 480 | kfree (sbi->s_ucpi[i]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
| 482 | UFSD(("EXIT (FAILED)\n")) |
| 483 | return 0; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * Put on-disk structures associated with cylinder groups and |
| 488 | * write them back to disk |
| 489 | */ |
Evgeniy Dushistov | e295cfc | 2006-02-03 03:04:04 -0800 | [diff] [blame] | 490 | static void ufs_put_cylinder_structures (struct super_block *sb) |
| 491 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | struct ufs_sb_info * sbi = UFS_SB(sb); |
| 493 | struct ufs_sb_private_info * uspi; |
| 494 | struct ufs_buffer_head * ubh; |
| 495 | unsigned char * base, * space; |
| 496 | unsigned blks, size, i; |
| 497 | |
| 498 | UFSD(("ENTER\n")) |
| 499 | |
| 500 | uspi = sbi->s_uspi; |
| 501 | |
| 502 | size = uspi->s_cssize; |
| 503 | blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; |
Evgeniy Dushistov | e295cfc | 2006-02-03 03:04:04 -0800 | [diff] [blame] | 504 | base = space = (char*) sbi->s_csp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | for (i = 0; i < blks; i += uspi->s_fpb) { |
| 506 | size = uspi->s_bsize; |
| 507 | if (i + uspi->s_fpb > blks) |
| 508 | size = (blks - i) * uspi->s_fsize; |
| 509 | ubh = ubh_bread(sb, uspi->s_csaddr + i, size); |
| 510 | ubh_memcpyubh (ubh, space, size); |
| 511 | space += size; |
| 512 | ubh_mark_buffer_uptodate (ubh, 1); |
| 513 | ubh_mark_buffer_dirty (ubh); |
| 514 | ubh_brelse (ubh); |
| 515 | } |
| 516 | for (i = 0; i < sbi->s_cg_loaded; i++) { |
| 517 | ufs_put_cylinder (sb, i); |
| 518 | kfree (sbi->s_ucpi[i]); |
| 519 | } |
| 520 | for (; i < UFS_MAX_GROUP_LOADED; i++) |
| 521 | kfree (sbi->s_ucpi[i]); |
| 522 | for (i = 0; i < uspi->s_ncg; i++) |
| 523 | brelse (sbi->s_ucg[i]); |
| 524 | kfree (sbi->s_ucg); |
| 525 | kfree (base); |
| 526 | UFSD(("EXIT\n")) |
| 527 | } |
| 528 | |
| 529 | static int ufs_fill_super(struct super_block *sb, void *data, int silent) |
| 530 | { |
| 531 | struct ufs_sb_info * sbi; |
| 532 | struct ufs_sb_private_info * uspi; |
| 533 | struct ufs_super_block_first * usb1; |
| 534 | struct ufs_super_block_second * usb2; |
| 535 | struct ufs_super_block_third * usb3; |
| 536 | struct ufs_super_block *usb; |
| 537 | struct ufs_buffer_head * ubh; |
| 538 | struct inode *inode; |
| 539 | unsigned block_size, super_block_size; |
| 540 | unsigned flags; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 541 | unsigned super_block_offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | uspi = NULL; |
| 544 | ubh = NULL; |
| 545 | flags = 0; |
| 546 | |
| 547 | UFSD(("ENTER\n")) |
| 548 | |
| 549 | sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); |
| 550 | if (!sbi) |
| 551 | goto failed_nomem; |
| 552 | sb->s_fs_info = sbi; |
| 553 | memset(sbi, 0, sizeof(struct ufs_sb_info)); |
| 554 | |
| 555 | UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) |
| 556 | |
| 557 | #ifndef CONFIG_UFS_FS_WRITE |
| 558 | if (!(sb->s_flags & MS_RDONLY)) { |
| 559 | printk("ufs was compiled with read-only support, " |
| 560 | "can't be mounted as read-write\n"); |
| 561 | goto failed; |
| 562 | } |
| 563 | #endif |
| 564 | /* |
| 565 | * Set default mount options |
| 566 | * Parse mount options |
| 567 | */ |
| 568 | sbi->s_mount_opt = 0; |
| 569 | ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); |
| 570 | if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { |
| 571 | printk("wrong mount options\n"); |
| 572 | goto failed; |
| 573 | } |
| 574 | if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { |
| 575 | if (!silent) |
| 576 | printk("You didn't specify the type of your ufs filesystem\n\n" |
| 577 | "mount -t ufs -o ufstype=" |
Michael Owen | c690a72 | 2006-03-24 18:21:44 +0100 | [diff] [blame] | 578 | "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " |
| 580 | "default is ufstype=old\n"); |
| 581 | ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); |
| 582 | } |
| 583 | |
| 584 | sbi->s_uspi = uspi = |
| 585 | kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); |
| 586 | if (!uspi) |
| 587 | goto failed; |
| 588 | |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 589 | super_block_offset=UFS_SBLOCK; |
| 590 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | /* Keep 2Gig file limit. Some UFS variants need to override |
| 592 | this but as I don't know which I'll let those in the know loosen |
| 593 | the rules */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) { |
| 595 | case UFS_MOUNT_UFSTYPE_44BSD: |
| 596 | UFSD(("ufstype=44bsd\n")) |
| 597 | uspi->s_fsize = block_size = 512; |
| 598 | uspi->s_fmask = ~(512 - 1); |
| 599 | uspi->s_fshift = 9; |
| 600 | uspi->s_sbsize = super_block_size = 1536; |
| 601 | uspi->s_sbbase = 0; |
| 602 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
| 603 | break; |
| 604 | case UFS_MOUNT_UFSTYPE_UFS2: |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 605 | UFSD(("ufstype=ufs2\n")); |
| 606 | super_block_offset=SBLOCK_UFS2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | uspi->s_fsize = block_size = 512; |
| 608 | uspi->s_fmask = ~(512 - 1); |
| 609 | uspi->s_fshift = 9; |
| 610 | uspi->s_sbsize = super_block_size = 1536; |
| 611 | uspi->s_sbbase = 0; |
| 612 | flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
| 613 | if (!(sb->s_flags & MS_RDONLY)) { |
| 614 | printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); |
| 615 | sb->s_flags |= MS_RDONLY; |
| 616 | } |
| 617 | break; |
| 618 | |
| 619 | case UFS_MOUNT_UFSTYPE_SUN: |
| 620 | UFSD(("ufstype=sun\n")) |
| 621 | uspi->s_fsize = block_size = 1024; |
| 622 | uspi->s_fmask = ~(1024 - 1); |
| 623 | uspi->s_fshift = 10; |
| 624 | uspi->s_sbsize = super_block_size = 2048; |
| 625 | uspi->s_sbbase = 0; |
| 626 | uspi->s_maxsymlinklen = 56; |
| 627 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; |
| 628 | break; |
| 629 | |
| 630 | case UFS_MOUNT_UFSTYPE_SUNx86: |
| 631 | UFSD(("ufstype=sunx86\n")) |
| 632 | uspi->s_fsize = block_size = 1024; |
| 633 | uspi->s_fmask = ~(1024 - 1); |
| 634 | uspi->s_fshift = 10; |
| 635 | uspi->s_sbsize = super_block_size = 2048; |
| 636 | uspi->s_sbbase = 0; |
| 637 | uspi->s_maxsymlinklen = 56; |
| 638 | flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; |
| 639 | break; |
| 640 | |
| 641 | case UFS_MOUNT_UFSTYPE_OLD: |
| 642 | UFSD(("ufstype=old\n")) |
| 643 | uspi->s_fsize = block_size = 1024; |
| 644 | uspi->s_fmask = ~(1024 - 1); |
| 645 | uspi->s_fshift = 10; |
| 646 | uspi->s_sbsize = super_block_size = 2048; |
| 647 | uspi->s_sbbase = 0; |
| 648 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
| 649 | if (!(sb->s_flags & MS_RDONLY)) { |
| 650 | if (!silent) |
| 651 | printk(KERN_INFO "ufstype=old is supported read-only\n"); |
| 652 | sb->s_flags |= MS_RDONLY; |
| 653 | } |
| 654 | break; |
| 655 | |
| 656 | case UFS_MOUNT_UFSTYPE_NEXTSTEP: |
| 657 | UFSD(("ufstype=nextstep\n")) |
| 658 | uspi->s_fsize = block_size = 1024; |
| 659 | uspi->s_fmask = ~(1024 - 1); |
| 660 | uspi->s_fshift = 10; |
| 661 | uspi->s_sbsize = super_block_size = 2048; |
| 662 | uspi->s_sbbase = 0; |
| 663 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
| 664 | if (!(sb->s_flags & MS_RDONLY)) { |
| 665 | if (!silent) |
| 666 | printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); |
| 667 | sb->s_flags |= MS_RDONLY; |
| 668 | } |
| 669 | break; |
| 670 | |
| 671 | case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: |
| 672 | UFSD(("ufstype=nextstep-cd\n")) |
| 673 | uspi->s_fsize = block_size = 2048; |
| 674 | uspi->s_fmask = ~(2048 - 1); |
| 675 | uspi->s_fshift = 11; |
| 676 | uspi->s_sbsize = super_block_size = 2048; |
| 677 | uspi->s_sbbase = 0; |
| 678 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
| 679 | if (!(sb->s_flags & MS_RDONLY)) { |
| 680 | if (!silent) |
| 681 | printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); |
| 682 | sb->s_flags |= MS_RDONLY; |
| 683 | } |
| 684 | break; |
| 685 | |
| 686 | case UFS_MOUNT_UFSTYPE_OPENSTEP: |
| 687 | UFSD(("ufstype=openstep\n")) |
| 688 | uspi->s_fsize = block_size = 1024; |
| 689 | uspi->s_fmask = ~(1024 - 1); |
| 690 | uspi->s_fshift = 10; |
| 691 | uspi->s_sbsize = super_block_size = 2048; |
| 692 | uspi->s_sbbase = 0; |
| 693 | flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; |
| 694 | if (!(sb->s_flags & MS_RDONLY)) { |
| 695 | if (!silent) |
| 696 | printk(KERN_INFO "ufstype=openstep is supported read-only\n"); |
| 697 | sb->s_flags |= MS_RDONLY; |
| 698 | } |
| 699 | break; |
| 700 | |
| 701 | case UFS_MOUNT_UFSTYPE_HP: |
| 702 | UFSD(("ufstype=hp\n")) |
| 703 | uspi->s_fsize = block_size = 1024; |
| 704 | uspi->s_fmask = ~(1024 - 1); |
| 705 | uspi->s_fshift = 10; |
| 706 | uspi->s_sbsize = super_block_size = 2048; |
| 707 | uspi->s_sbbase = 0; |
| 708 | flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; |
| 709 | if (!(sb->s_flags & MS_RDONLY)) { |
| 710 | if (!silent) |
| 711 | printk(KERN_INFO "ufstype=hp is supported read-only\n"); |
| 712 | sb->s_flags |= MS_RDONLY; |
| 713 | } |
| 714 | break; |
| 715 | default: |
| 716 | if (!silent) |
| 717 | printk("unknown ufstype\n"); |
| 718 | goto failed; |
| 719 | } |
| 720 | |
| 721 | again: |
| 722 | if (!sb_set_blocksize(sb, block_size)) { |
| 723 | printk(KERN_ERR "UFS: failed to set blocksize\n"); |
| 724 | goto failed; |
| 725 | } |
| 726 | |
| 727 | /* |
| 728 | * read ufs super block from device |
| 729 | */ |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 730 | |
| 731 | ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); |
| 732 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | if (!ubh) |
| 734 | goto failed; |
| 735 | |
| 736 | |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 737 | usb1 = ubh_get_usb_first(uspi); |
| 738 | usb2 = ubh_get_usb_second(uspi); |
| 739 | usb3 = ubh_get_usb_third(uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | usb = (struct ufs_super_block *) |
| 741 | ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; |
| 742 | |
| 743 | /* |
| 744 | * Check ufs magic number |
| 745 | */ |
| 746 | sbi->s_bytesex = BYTESEX_LE; |
| 747 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
| 748 | case UFS_MAGIC: |
| 749 | case UFS2_MAGIC: |
| 750 | case UFS_MAGIC_LFN: |
| 751 | case UFS_MAGIC_FEA: |
| 752 | case UFS_MAGIC_4GB: |
| 753 | goto magic_found; |
| 754 | } |
| 755 | sbi->s_bytesex = BYTESEX_BE; |
| 756 | switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { |
| 757 | case UFS_MAGIC: |
| 758 | case UFS2_MAGIC: |
| 759 | case UFS_MAGIC_LFN: |
| 760 | case UFS_MAGIC_FEA: |
| 761 | case UFS_MAGIC_4GB: |
| 762 | goto magic_found; |
| 763 | } |
| 764 | |
| 765 | if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) |
| 766 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) |
| 767 | || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) |
| 768 | && uspi->s_sbbase < 256) { |
| 769 | ubh_brelse_uspi(uspi); |
| 770 | ubh = NULL; |
| 771 | uspi->s_sbbase += 8; |
| 772 | goto again; |
| 773 | } |
| 774 | if (!silent) |
| 775 | printk("ufs_read_super: bad magic number\n"); |
| 776 | goto failed; |
| 777 | |
| 778 | magic_found: |
| 779 | /* |
| 780 | * Check block and fragment sizes |
| 781 | */ |
| 782 | uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); |
| 783 | uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); |
| 784 | uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); |
| 785 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
| 786 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
| 787 | |
| 788 | if (uspi->s_fsize & (uspi->s_fsize - 1)) { |
| 789 | printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", |
| 790 | uspi->s_fsize); |
| 791 | goto failed; |
| 792 | } |
| 793 | if (uspi->s_fsize < 512) { |
| 794 | printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", |
| 795 | uspi->s_fsize); |
| 796 | goto failed; |
| 797 | } |
| 798 | if (uspi->s_fsize > 4096) { |
| 799 | printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", |
| 800 | uspi->s_fsize); |
| 801 | goto failed; |
| 802 | } |
| 803 | if (uspi->s_bsize & (uspi->s_bsize - 1)) { |
| 804 | printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", |
| 805 | uspi->s_bsize); |
| 806 | goto failed; |
| 807 | } |
| 808 | if (uspi->s_bsize < 4096) { |
| 809 | printk(KERN_ERR "ufs_read_super: block size %u is too small\n", |
| 810 | uspi->s_bsize); |
| 811 | goto failed; |
| 812 | } |
| 813 | if (uspi->s_bsize / uspi->s_fsize > 8) { |
| 814 | printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", |
| 815 | uspi->s_bsize / uspi->s_fsize); |
| 816 | goto failed; |
| 817 | } |
| 818 | if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { |
| 819 | ubh_brelse_uspi(uspi); |
| 820 | ubh = NULL; |
| 821 | block_size = uspi->s_fsize; |
| 822 | super_block_size = uspi->s_sbsize; |
| 823 | UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) |
| 824 | goto again; |
| 825 | } |
| 826 | |
| 827 | #ifdef UFS_SUPER_DEBUG_MORE |
| 828 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) |
| 829 | ufs2_print_super_stuff(sb,usb); |
| 830 | else |
| 831 | ufs_print_super_stuff(sb, usb1, usb2, usb3); |
| 832 | #endif |
| 833 | |
| 834 | /* |
| 835 | * Check, if file system was correctly unmounted. |
| 836 | * If not, make it read only. |
| 837 | */ |
| 838 | if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || |
| 839 | ((flags & UFS_ST_MASK) == UFS_ST_OLD) || |
| 840 | (((flags & UFS_ST_MASK) == UFS_ST_SUN || |
| 841 | (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && |
| 842 | (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) { |
| 843 | switch(usb1->fs_clean) { |
| 844 | case UFS_FSCLEAN: |
| 845 | UFSD(("fs is clean\n")) |
| 846 | break; |
| 847 | case UFS_FSSTABLE: |
| 848 | UFSD(("fs is stable\n")) |
| 849 | break; |
| 850 | case UFS_FSOSF1: |
| 851 | UFSD(("fs is DEC OSF/1\n")) |
| 852 | break; |
| 853 | case UFS_FSACTIVE: |
| 854 | printk("ufs_read_super: fs is active\n"); |
| 855 | sb->s_flags |= MS_RDONLY; |
| 856 | break; |
| 857 | case UFS_FSBAD: |
| 858 | printk("ufs_read_super: fs is bad\n"); |
| 859 | sb->s_flags |= MS_RDONLY; |
| 860 | break; |
| 861 | default: |
| 862 | printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); |
| 863 | sb->s_flags |= MS_RDONLY; |
| 864 | break; |
| 865 | } |
| 866 | } |
| 867 | else { |
| 868 | printk("ufs_read_super: fs needs fsck\n"); |
| 869 | sb->s_flags |= MS_RDONLY; |
| 870 | } |
| 871 | |
| 872 | /* |
| 873 | * Read ufs_super_block into internal data structures |
| 874 | */ |
| 875 | sb->s_op = &ufs_super_ops; |
| 876 | sb->dq_op = NULL; /***/ |
| 877 | sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); |
| 878 | |
| 879 | uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); |
| 880 | uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); |
| 881 | uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); |
| 882 | uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); |
| 883 | uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); |
| 884 | uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); |
| 885 | |
| 886 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
| 887 | uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size); |
| 888 | uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); |
| 889 | } |
| 890 | else { |
| 891 | uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); |
| 892 | uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); |
| 893 | } |
| 894 | |
| 895 | uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); |
| 896 | /* s_bsize already set */ |
| 897 | /* s_fsize already set */ |
| 898 | uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); |
| 899 | uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); |
| 900 | uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); |
| 901 | uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); |
| 902 | uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); |
| 903 | uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); |
| 904 | UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, |
| 905 | uspi->s_fshift)); |
| 906 | uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); |
| 907 | uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); |
| 908 | /* s_sbsize already set */ |
| 909 | uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); |
| 910 | uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); |
| 911 | uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); |
| 912 | uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); |
| 913 | uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); |
| 914 | uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); |
| 915 | uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); |
| 916 | uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); |
| 917 | uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); |
| 918 | uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); |
| 919 | uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); |
| 920 | uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); |
| 921 | uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); |
| 922 | uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); |
| 923 | uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); |
| 924 | uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); |
| 925 | uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); |
| 926 | uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); |
| 927 | uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); |
| 928 | uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); |
| 929 | uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); |
| 930 | uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); |
| 931 | uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); |
| 932 | uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); |
| 933 | |
| 934 | /* |
| 935 | * Compute another frequently used values |
| 936 | */ |
| 937 | uspi->s_fpbmask = uspi->s_fpb - 1; |
| 938 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
| 939 | uspi->s_apbshift = uspi->s_bshift - 3; |
| 940 | } |
| 941 | else { |
| 942 | uspi->s_apbshift = uspi->s_bshift - 2; |
| 943 | } |
| 944 | uspi->s_2apbshift = uspi->s_apbshift * 2; |
| 945 | uspi->s_3apbshift = uspi->s_apbshift * 3; |
| 946 | uspi->s_apb = 1 << uspi->s_apbshift; |
| 947 | uspi->s_2apb = 1 << uspi->s_2apbshift; |
| 948 | uspi->s_3apb = 1 << uspi->s_3apbshift; |
| 949 | uspi->s_apbmask = uspi->s_apb - 1; |
| 950 | uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; |
| 951 | uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; |
| 952 | uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; |
| 953 | uspi->s_bpf = uspi->s_fsize << 3; |
| 954 | uspi->s_bpfshift = uspi->s_fshift + 3; |
| 955 | uspi->s_bpfmask = uspi->s_bpf - 1; |
| 956 | if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == |
| 957 | UFS_MOUNT_UFSTYPE_44BSD) |
| 958 | uspi->s_maxsymlinklen = |
| 959 | fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); |
| 960 | |
| 961 | sbi->s_flags = flags; |
| 962 | |
| 963 | inode = iget(sb, UFS_ROOTINO); |
| 964 | if (!inode || is_bad_inode(inode)) |
| 965 | goto failed; |
| 966 | sb->s_root = d_alloc_root(inode); |
| 967 | if (!sb->s_root) |
| 968 | goto dalloc_failed; |
| 969 | |
| 970 | |
| 971 | /* |
| 972 | * Read cylinder group structures |
| 973 | */ |
| 974 | if (!(sb->s_flags & MS_RDONLY)) |
| 975 | if (!ufs_read_cylinder_structures(sb)) |
| 976 | goto failed; |
| 977 | |
| 978 | UFSD(("EXIT\n")) |
| 979 | return 0; |
| 980 | |
| 981 | dalloc_failed: |
| 982 | iput(inode); |
| 983 | failed: |
Jesper Juhl | f99d49a | 2005-11-07 01:01:34 -0800 | [diff] [blame] | 984 | if (ubh) |
| 985 | ubh_brelse_uspi (uspi); |
| 986 | kfree (uspi); |
| 987 | kfree(sbi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | sb->s_fs_info = NULL; |
| 989 | UFSD(("EXIT (FAILED)\n")) |
| 990 | return -EINVAL; |
| 991 | |
| 992 | failed_nomem: |
| 993 | UFSD(("EXIT (NOMEM)\n")) |
| 994 | return -ENOMEM; |
| 995 | } |
| 996 | |
| 997 | static void ufs_write_super (struct super_block *sb) { |
| 998 | struct ufs_sb_private_info * uspi; |
| 999 | struct ufs_super_block_first * usb1; |
| 1000 | struct ufs_super_block_third * usb3; |
| 1001 | unsigned flags; |
| 1002 | |
| 1003 | lock_kernel(); |
| 1004 | |
| 1005 | UFSD(("ENTER\n")) |
| 1006 | flags = UFS_SB(sb)->s_flags; |
| 1007 | uspi = UFS_SB(sb)->s_uspi; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 1008 | usb1 = ubh_get_usb_first(uspi); |
| 1009 | usb3 = ubh_get_usb_third(uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1010 | |
| 1011 | if (!(sb->s_flags & MS_RDONLY)) { |
| 1012 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
| 1013 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN |
| 1014 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
| 1015 | ufs_set_fs_state(sb, usb1, usb3, |
| 1016 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
| 1017 | ubh_mark_buffer_dirty (USPI_UBH); |
| 1018 | } |
| 1019 | sb->s_dirt = 0; |
| 1020 | UFSD(("EXIT\n")) |
| 1021 | unlock_kernel(); |
| 1022 | } |
| 1023 | |
| 1024 | static void ufs_put_super (struct super_block *sb) |
| 1025 | { |
| 1026 | struct ufs_sb_info * sbi = UFS_SB(sb); |
| 1027 | |
| 1028 | UFSD(("ENTER\n")) |
| 1029 | |
| 1030 | if (!(sb->s_flags & MS_RDONLY)) |
| 1031 | ufs_put_cylinder_structures (sb); |
| 1032 | |
| 1033 | ubh_brelse_uspi (sbi->s_uspi); |
| 1034 | kfree (sbi->s_uspi); |
| 1035 | kfree (sbi); |
| 1036 | sb->s_fs_info = NULL; |
| 1037 | return; |
| 1038 | } |
| 1039 | |
| 1040 | |
| 1041 | static int ufs_remount (struct super_block *sb, int *mount_flags, char *data) |
| 1042 | { |
| 1043 | struct ufs_sb_private_info * uspi; |
| 1044 | struct ufs_super_block_first * usb1; |
| 1045 | struct ufs_super_block_third * usb3; |
| 1046 | unsigned new_mount_opt, ufstype; |
| 1047 | unsigned flags; |
| 1048 | |
| 1049 | uspi = UFS_SB(sb)->s_uspi; |
| 1050 | flags = UFS_SB(sb)->s_flags; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 1051 | usb1 = ubh_get_usb_first(uspi); |
| 1052 | usb3 = ubh_get_usb_third(uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | |
| 1054 | /* |
| 1055 | * Allow the "check" option to be passed as a remount option. |
| 1056 | * It is not possible to change ufstype option during remount |
| 1057 | */ |
| 1058 | ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; |
| 1059 | new_mount_opt = 0; |
| 1060 | ufs_set_opt (new_mount_opt, ONERROR_LOCK); |
| 1061 | if (!ufs_parse_options (data, &new_mount_opt)) |
| 1062 | return -EINVAL; |
| 1063 | if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { |
| 1064 | new_mount_opt |= ufstype; |
| 1065 | } |
| 1066 | else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { |
| 1067 | printk("ufstype can't be changed during remount\n"); |
| 1068 | return -EINVAL; |
| 1069 | } |
| 1070 | |
| 1071 | if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { |
| 1072 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
| 1073 | return 0; |
| 1074 | } |
| 1075 | |
| 1076 | /* |
| 1077 | * fs was mouted as rw, remounting ro |
| 1078 | */ |
| 1079 | if (*mount_flags & MS_RDONLY) { |
| 1080 | ufs_put_cylinder_structures(sb); |
| 1081 | usb1->fs_time = cpu_to_fs32(sb, get_seconds()); |
| 1082 | if ((flags & UFS_ST_MASK) == UFS_ST_SUN |
| 1083 | || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) |
| 1084 | ufs_set_fs_state(sb, usb1, usb3, |
| 1085 | UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); |
| 1086 | ubh_mark_buffer_dirty (USPI_UBH); |
| 1087 | sb->s_dirt = 0; |
| 1088 | sb->s_flags |= MS_RDONLY; |
| 1089 | } |
| 1090 | /* |
| 1091 | * fs was mounted as ro, remounting rw |
| 1092 | */ |
| 1093 | else { |
| 1094 | #ifndef CONFIG_UFS_FS_WRITE |
| 1095 | printk("ufs was compiled with read-only support, " |
| 1096 | "can't be mounted as read-write\n"); |
| 1097 | return -EINVAL; |
| 1098 | #else |
| 1099 | if (ufstype != UFS_MOUNT_UFSTYPE_SUN && |
| 1100 | ufstype != UFS_MOUNT_UFSTYPE_44BSD && |
| 1101 | ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { |
| 1102 | printk("this ufstype is read-only supported\n"); |
| 1103 | return -EINVAL; |
| 1104 | } |
| 1105 | if (!ufs_read_cylinder_structures (sb)) { |
| 1106 | printk("failed during remounting\n"); |
| 1107 | return -EPERM; |
| 1108 | } |
| 1109 | sb->s_flags &= ~MS_RDONLY; |
| 1110 | #endif |
| 1111 | } |
| 1112 | UFS_SB(sb)->s_mount_opt = new_mount_opt; |
| 1113 | return 0; |
| 1114 | } |
| 1115 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 1116 | static int ufs_statfs (struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1117 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 1118 | struct super_block *sb = dentry->d_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | struct ufs_sb_private_info * uspi; |
| 1120 | struct ufs_super_block_first * usb1; |
| 1121 | struct ufs_super_block * usb; |
| 1122 | unsigned flags = 0; |
| 1123 | |
| 1124 | lock_kernel(); |
| 1125 | |
| 1126 | uspi = UFS_SB(sb)->s_uspi; |
Evgeniy | 7b4ee73 | 2006-01-14 11:42:06 +0300 | [diff] [blame] | 1127 | usb1 = ubh_get_usb_first (uspi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | usb = (struct ufs_super_block *) |
| 1129 | ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; |
| 1130 | |
| 1131 | flags = UFS_SB(sb)->s_flags; |
| 1132 | if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { |
| 1133 | buf->f_type = UFS2_MAGIC; |
| 1134 | buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); |
| 1135 | buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) + |
| 1136 | fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree); |
| 1137 | buf->f_ffree = fs64_to_cpu(sb, |
| 1138 | usb->fs_u11.fs_u2.fs_cstotal.cs_nifree); |
| 1139 | } |
| 1140 | else { |
| 1141 | buf->f_type = UFS_MAGIC; |
| 1142 | buf->f_blocks = uspi->s_dsize; |
| 1143 | buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + |
| 1144 | fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); |
| 1145 | buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); |
| 1146 | } |
| 1147 | buf->f_bsize = sb->s_blocksize; |
| 1148 | buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) |
| 1149 | ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; |
| 1150 | buf->f_files = uspi->s_ncg * uspi->s_ipg; |
| 1151 | buf->f_namelen = UFS_MAXNAMLEN; |
| 1152 | |
| 1153 | unlock_kernel(); |
| 1154 | |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | static kmem_cache_t * ufs_inode_cachep; |
| 1159 | |
| 1160 | static struct inode *ufs_alloc_inode(struct super_block *sb) |
| 1161 | { |
| 1162 | struct ufs_inode_info *ei; |
| 1163 | ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); |
| 1164 | if (!ei) |
| 1165 | return NULL; |
| 1166 | ei->vfs_inode.i_version = 1; |
| 1167 | return &ei->vfs_inode; |
| 1168 | } |
| 1169 | |
| 1170 | static void ufs_destroy_inode(struct inode *inode) |
| 1171 | { |
| 1172 | kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); |
| 1173 | } |
| 1174 | |
| 1175 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
| 1176 | { |
| 1177 | struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; |
| 1178 | |
| 1179 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| 1180 | SLAB_CTOR_CONSTRUCTOR) |
| 1181 | inode_init_once(&ei->vfs_inode); |
| 1182 | } |
| 1183 | |
| 1184 | static int init_inodecache(void) |
| 1185 | { |
| 1186 | ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", |
| 1187 | sizeof(struct ufs_inode_info), |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 1188 | 0, (SLAB_RECLAIM_ACCOUNT| |
| 1189 | SLAB_MEM_SPREAD), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | init_once, NULL); |
| 1191 | if (ufs_inode_cachep == NULL) |
| 1192 | return -ENOMEM; |
| 1193 | return 0; |
| 1194 | } |
| 1195 | |
| 1196 | static void destroy_inodecache(void) |
| 1197 | { |
| 1198 | if (kmem_cache_destroy(ufs_inode_cachep)) |
| 1199 | printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); |
| 1200 | } |
| 1201 | |
| 1202 | #ifdef CONFIG_QUOTA |
| 1203 | static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); |
| 1204 | static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); |
| 1205 | #endif |
| 1206 | |
| 1207 | static struct super_operations ufs_super_ops = { |
| 1208 | .alloc_inode = ufs_alloc_inode, |
| 1209 | .destroy_inode = ufs_destroy_inode, |
| 1210 | .read_inode = ufs_read_inode, |
| 1211 | .write_inode = ufs_write_inode, |
| 1212 | .delete_inode = ufs_delete_inode, |
| 1213 | .put_super = ufs_put_super, |
| 1214 | .write_super = ufs_write_super, |
| 1215 | .statfs = ufs_statfs, |
| 1216 | .remount_fs = ufs_remount, |
| 1217 | #ifdef CONFIG_QUOTA |
| 1218 | .quota_read = ufs_quota_read, |
| 1219 | .quota_write = ufs_quota_write, |
| 1220 | #endif |
| 1221 | }; |
| 1222 | |
| 1223 | #ifdef CONFIG_QUOTA |
| 1224 | |
| 1225 | /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| 1226 | * acquiring the locks... As quota files are never truncated and quota code |
| 1227 | * itself serializes the operations (and noone else should touch the files) |
| 1228 | * we don't have to be afraid of races */ |
| 1229 | static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, |
| 1230 | size_t len, loff_t off) |
| 1231 | { |
| 1232 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 1233 | sector_t blk = off >> sb->s_blocksize_bits; |
| 1234 | int err = 0; |
| 1235 | int offset = off & (sb->s_blocksize - 1); |
| 1236 | int tocopy; |
| 1237 | size_t toread; |
| 1238 | struct buffer_head *bh; |
| 1239 | loff_t i_size = i_size_read(inode); |
| 1240 | |
| 1241 | if (off > i_size) |
| 1242 | return 0; |
| 1243 | if (off+len > i_size) |
| 1244 | len = i_size-off; |
| 1245 | toread = len; |
| 1246 | while (toread > 0) { |
| 1247 | tocopy = sb->s_blocksize - offset < toread ? |
| 1248 | sb->s_blocksize - offset : toread; |
| 1249 | |
| 1250 | bh = ufs_bread(inode, blk, 0, &err); |
| 1251 | if (err) |
| 1252 | return err; |
| 1253 | if (!bh) /* A hole? */ |
| 1254 | memset(data, 0, tocopy); |
| 1255 | else { |
| 1256 | memcpy(data, bh->b_data+offset, tocopy); |
| 1257 | brelse(bh); |
| 1258 | } |
| 1259 | offset = 0; |
| 1260 | toread -= tocopy; |
| 1261 | data += tocopy; |
| 1262 | blk++; |
| 1263 | } |
| 1264 | return len; |
| 1265 | } |
| 1266 | |
| 1267 | /* Write to quotafile */ |
| 1268 | static ssize_t ufs_quota_write(struct super_block *sb, int type, |
| 1269 | const char *data, size_t len, loff_t off) |
| 1270 | { |
| 1271 | struct inode *inode = sb_dqopt(sb)->files[type]; |
| 1272 | sector_t blk = off >> sb->s_blocksize_bits; |
| 1273 | int err = 0; |
| 1274 | int offset = off & (sb->s_blocksize - 1); |
| 1275 | int tocopy; |
| 1276 | size_t towrite = len; |
| 1277 | struct buffer_head *bh; |
| 1278 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1279 | mutex_lock(&inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | while (towrite > 0) { |
| 1281 | tocopy = sb->s_blocksize - offset < towrite ? |
| 1282 | sb->s_blocksize - offset : towrite; |
| 1283 | |
| 1284 | bh = ufs_bread(inode, blk, 1, &err); |
| 1285 | if (!bh) |
| 1286 | goto out; |
| 1287 | lock_buffer(bh); |
| 1288 | memcpy(bh->b_data+offset, data, tocopy); |
| 1289 | flush_dcache_page(bh->b_page); |
| 1290 | set_buffer_uptodate(bh); |
| 1291 | mark_buffer_dirty(bh); |
| 1292 | unlock_buffer(bh); |
| 1293 | brelse(bh); |
| 1294 | offset = 0; |
| 1295 | towrite -= tocopy; |
| 1296 | data += tocopy; |
| 1297 | blk++; |
| 1298 | } |
| 1299 | out: |
Evgeniy Polyakov | 15b2fe3 | 2006-01-08 01:04:51 -0800 | [diff] [blame] | 1300 | if (len == towrite) { |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1301 | mutex_unlock(&inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1302 | return err; |
Evgeniy Polyakov | 15b2fe3 | 2006-01-08 01:04:51 -0800 | [diff] [blame] | 1303 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | if (inode->i_size < off+len-towrite) |
| 1305 | i_size_write(inode, off+len-towrite); |
| 1306 | inode->i_version++; |
| 1307 | inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; |
| 1308 | mark_inode_dirty(inode); |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1309 | mutex_unlock(&inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | return len - towrite; |
| 1311 | } |
| 1312 | |
| 1313 | #endif |
| 1314 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1315 | static int ufs_get_sb(struct file_system_type *fs_type, |
| 1316 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1317 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 1318 | return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | static struct file_system_type ufs_fs_type = { |
| 1322 | .owner = THIS_MODULE, |
| 1323 | .name = "ufs", |
| 1324 | .get_sb = ufs_get_sb, |
| 1325 | .kill_sb = kill_block_super, |
| 1326 | .fs_flags = FS_REQUIRES_DEV, |
| 1327 | }; |
| 1328 | |
| 1329 | static int __init init_ufs_fs(void) |
| 1330 | { |
| 1331 | int err = init_inodecache(); |
| 1332 | if (err) |
| 1333 | goto out1; |
| 1334 | err = register_filesystem(&ufs_fs_type); |
| 1335 | if (err) |
| 1336 | goto out; |
| 1337 | return 0; |
| 1338 | out: |
| 1339 | destroy_inodecache(); |
| 1340 | out1: |
| 1341 | return err; |
| 1342 | } |
| 1343 | |
| 1344 | static void __exit exit_ufs_fs(void) |
| 1345 | { |
| 1346 | unregister_filesystem(&ufs_fs_type); |
| 1347 | destroy_inodecache(); |
| 1348 | } |
| 1349 | |
| 1350 | module_init(init_ufs_fs) |
| 1351 | module_exit(exit_ufs_fs) |
| 1352 | MODULE_LICENSE("GPL"); |