| /* |
| * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "xfs.h" |
| #include "xfs_shared.h" |
| #include "xfs_format.h" |
| #include "xfs_log_format.h" |
| #include "xfs_trans_resv.h" |
| #include "xfs_sb.h" |
| #include "xfs_mount.h" |
| #include "xfs_da_format.h" |
| #include "xfs_inode.h" |
| #include "xfs_btree.h" |
| #include "xfs_bmap.h" |
| #include "xfs_alloc.h" |
| #include "xfs_error.h" |
| #include "xfs_fsops.h" |
| #include "xfs_trans.h" |
| #include "xfs_buf_item.h" |
| #include "xfs_log.h" |
| #include "xfs_log_priv.h" |
| #include "xfs_da_btree.h" |
| #include "xfs_dir2.h" |
| #include "xfs_extfree_item.h" |
| #include "xfs_mru_cache.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_icache.h" |
| #include "xfs_trace.h" |
| #include "xfs_icreate_item.h" |
| #include "xfs_filestream.h" |
| #include "xfs_quota.h" |
| #include "xfs_sysfs.h" |
| #include "xfs_ondisk.h" |
| #include "xfs_rmap_item.h" |
| #include "xfs_refcount_item.h" |
| #include "xfs_bmap_item.h" |
| #include "xfs_reflink.h" |
| |
| #include <linux/namei.h> |
| #include <linux/dax.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/mount.h> |
| #include <linux/mempool.h> |
| #include <linux/writeback.h> |
| #include <linux/kthread.h> |
| #include <linux/freezer.h> |
| #include <linux/parser.h> |
| |
| static const struct super_operations xfs_super_operations; |
| struct bio_set *xfs_ioend_bioset; |
| |
| static struct kset *xfs_kset; /* top-level xfs sysfs dir */ |
| #ifdef DEBUG |
| static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ |
| #endif |
| |
| /* |
| * Table driven mount option parser. |
| */ |
| enum { |
| Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize, |
| Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, |
| Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, |
| Opt_allocsize, Opt_norecovery, Opt_barrier, Opt_nobarrier, |
| Opt_inode64, Opt_inode32, Opt_ikeep, Opt_noikeep, |
| Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2, Opt_filestreams, |
| Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota, Opt_prjquota, |
| Opt_uquota, Opt_gquota, Opt_pquota, |
| Opt_uqnoenforce, Opt_gqnoenforce, Opt_pqnoenforce, Opt_qnoenforce, |
| Opt_discard, Opt_nodiscard, Opt_dax, Opt_err, |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_logbufs, "logbufs=%u"}, /* number of XFS log buffers */ |
| {Opt_logbsize, "logbsize=%s"}, /* size of XFS log buffers */ |
| {Opt_logdev, "logdev=%s"}, /* log device */ |
| {Opt_rtdev, "rtdev=%s"}, /* realtime I/O device */ |
| {Opt_biosize, "biosize=%u"}, /* log2 of preferred buffered io size */ |
| {Opt_wsync, "wsync"}, /* safe-mode nfs compatible mount */ |
| {Opt_noalign, "noalign"}, /* turn off stripe alignment */ |
| {Opt_swalloc, "swalloc"}, /* turn on stripe width allocation */ |
| {Opt_sunit, "sunit=%u"}, /* data volume stripe unit */ |
| {Opt_swidth, "swidth=%u"}, /* data volume stripe width */ |
| {Opt_nouuid, "nouuid"}, /* ignore filesystem UUID */ |
| {Opt_mtpt, "mtpt"}, /* filesystem mount point */ |
| {Opt_grpid, "grpid"}, /* group-ID from parent directory */ |
| {Opt_nogrpid, "nogrpid"}, /* group-ID from current process */ |
| {Opt_bsdgroups, "bsdgroups"}, /* group-ID from parent directory */ |
| {Opt_sysvgroups,"sysvgroups"}, /* group-ID from current process */ |
| {Opt_allocsize, "allocsize=%s"},/* preferred allocation size */ |
| {Opt_norecovery,"norecovery"}, /* don't run XFS recovery */ |
| {Opt_inode64, "inode64"}, /* inodes can be allocated anywhere */ |
| {Opt_inode32, "inode32"}, /* inode allocation limited to |
| * XFS_MAXINUMBER_32 */ |
| {Opt_ikeep, "ikeep"}, /* do not free empty inode clusters */ |
| {Opt_noikeep, "noikeep"}, /* free empty inode clusters */ |
| {Opt_largeio, "largeio"}, /* report large I/O sizes in stat() */ |
| {Opt_nolargeio, "nolargeio"}, /* do not report large I/O sizes |
| * in stat(). */ |
| {Opt_attr2, "attr2"}, /* do use attr2 attribute format */ |
| {Opt_noattr2, "noattr2"}, /* do not use attr2 attribute format */ |
| {Opt_filestreams,"filestreams"},/* use filestreams allocator */ |
| {Opt_quota, "quota"}, /* disk quotas (user) */ |
| {Opt_noquota, "noquota"}, /* no quotas */ |
| {Opt_usrquota, "usrquota"}, /* user quota enabled */ |
| {Opt_grpquota, "grpquota"}, /* group quota enabled */ |
| {Opt_prjquota, "prjquota"}, /* project quota enabled */ |
| {Opt_uquota, "uquota"}, /* user quota (IRIX variant) */ |
| {Opt_gquota, "gquota"}, /* group quota (IRIX variant) */ |
| {Opt_pquota, "pquota"}, /* project quota (IRIX variant) */ |
| {Opt_uqnoenforce,"uqnoenforce"},/* user quota limit enforcement */ |
| {Opt_gqnoenforce,"gqnoenforce"},/* group quota limit enforcement */ |
| {Opt_pqnoenforce,"pqnoenforce"},/* project quota limit enforcement */ |
| {Opt_qnoenforce, "qnoenforce"}, /* same as uqnoenforce */ |
| {Opt_discard, "discard"}, /* Discard unused blocks */ |
| {Opt_nodiscard, "nodiscard"}, /* Do not discard unused blocks */ |
| |
| {Opt_dax, "dax"}, /* Enable direct access to bdev pages */ |
| |
| /* Deprecated mount options scheduled for removal */ |
| {Opt_barrier, "barrier"}, /* use writer barriers for log write and |
| * unwritten extent conversion */ |
| {Opt_nobarrier, "nobarrier"}, /* .. disable */ |
| |
| {Opt_err, NULL}, |
| }; |
| |
| |
| STATIC int |
| suffix_kstrtoint(const substring_t *s, unsigned int base, int *res) |
| { |
| int last, shift_left_factor = 0, _res; |
| char *value; |
| int ret = 0; |
| |
| value = match_strdup(s); |
| if (!value) |
| return -ENOMEM; |
| |
| last = strlen(value) - 1; |
| if (value[last] == 'K' || value[last] == 'k') { |
| shift_left_factor = 10; |
| value[last] = '\0'; |
| } |
| if (value[last] == 'M' || value[last] == 'm') { |
| shift_left_factor = 20; |
| value[last] = '\0'; |
| } |
| if (value[last] == 'G' || value[last] == 'g') { |
| shift_left_factor = 30; |
| value[last] = '\0'; |
| } |
| |
| if (kstrtoint(value, base, &_res)) |
| ret = -EINVAL; |
| kfree(value); |
| *res = _res << shift_left_factor; |
| return ret; |
| } |
| |
| /* |
| * This function fills in xfs_mount_t fields based on mount args. |
| * Note: the superblock has _not_ yet been read in. |
| * |
| * Note that this function leaks the various device name allocations on |
| * failure. The caller takes care of them. |
| * |
| * *sb is const because this is also used to test options on the remount |
| * path, and we don't want this to have any side effects at remount time. |
| * Today this function does not change *sb, but just to future-proof... |
| */ |
| STATIC int |
| xfs_parseargs( |
| struct xfs_mount *mp, |
| char *options) |
| { |
| const struct super_block *sb = mp->m_super; |
| char *p; |
| substring_t args[MAX_OPT_ARGS]; |
| int dsunit = 0; |
| int dswidth = 0; |
| int iosize = 0; |
| __uint8_t iosizelog = 0; |
| |
| /* |
| * set up the mount name first so all the errors will refer to the |
| * correct device. |
| */ |
| mp->m_fsname = kstrndup(sb->s_id, MAXNAMELEN, GFP_KERNEL); |
| if (!mp->m_fsname) |
| return -ENOMEM; |
| mp->m_fsname_len = strlen(mp->m_fsname) + 1; |
| |
| /* |
| * Copy binary VFS mount flags we are interested in. |
| */ |
| if (sb->s_flags & MS_RDONLY) |
| mp->m_flags |= XFS_MOUNT_RDONLY; |
| if (sb->s_flags & MS_DIRSYNC) |
| mp->m_flags |= XFS_MOUNT_DIRSYNC; |
| if (sb->s_flags & MS_SYNCHRONOUS) |
| mp->m_flags |= XFS_MOUNT_WSYNC; |
| |
| /* |
| * Set some default flags that could be cleared by the mount option |
| * parsing. |
| */ |
| mp->m_flags |= XFS_MOUNT_BARRIER; |
| mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; |
| |
| /* |
| * These can be overridden by the mount option parsing. |
| */ |
| mp->m_logbufs = -1; |
| mp->m_logbsize = -1; |
| |
| if (!options) |
| goto done; |
| |
| while ((p = strsep(&options, ",")) != NULL) { |
| int token; |
| |
| if (!*p) |
| continue; |
| |
| token = match_token(p, tokens, args); |
| switch (token) { |
| case Opt_logbufs: |
| if (match_int(args, &mp->m_logbufs)) |
| return -EINVAL; |
| break; |
| case Opt_logbsize: |
| if (suffix_kstrtoint(args, 10, &mp->m_logbsize)) |
| return -EINVAL; |
| break; |
| case Opt_logdev: |
| mp->m_logname = match_strdup(args); |
| if (!mp->m_logname) |
| return -ENOMEM; |
| break; |
| case Opt_mtpt: |
| xfs_warn(mp, "%s option not allowed on this system", p); |
| return -EINVAL; |
| case Opt_rtdev: |
| mp->m_rtname = match_strdup(args); |
| if (!mp->m_rtname) |
| return -ENOMEM; |
| break; |
| case Opt_allocsize: |
| case Opt_biosize: |
| if (suffix_kstrtoint(args, 10, &iosize)) |
| return -EINVAL; |
| iosizelog = ffs(iosize) - 1; |
| break; |
| case Opt_grpid: |
| case Opt_bsdgroups: |
| mp->m_flags |= XFS_MOUNT_GRPID; |
| break; |
| case Opt_nogrpid: |
| case Opt_sysvgroups: |
| mp->m_flags &= ~XFS_MOUNT_GRPID; |
| break; |
| case Opt_wsync: |
| mp->m_flags |= XFS_MOUNT_WSYNC; |
| break; |
| case Opt_norecovery: |
| mp->m_flags |= XFS_MOUNT_NORECOVERY; |
| break; |
| case Opt_noalign: |
| mp->m_flags |= XFS_MOUNT_NOALIGN; |
| break; |
| case Opt_swalloc: |
| mp->m_flags |= XFS_MOUNT_SWALLOC; |
| break; |
| case Opt_sunit: |
| if (match_int(args, &dsunit)) |
| return -EINVAL; |
| break; |
| case Opt_swidth: |
| if (match_int(args, &dswidth)) |
| return -EINVAL; |
| break; |
| case Opt_inode32: |
| mp->m_flags |= XFS_MOUNT_SMALL_INUMS; |
| break; |
| case Opt_inode64: |
| mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; |
| break; |
| case Opt_nouuid: |
| mp->m_flags |= XFS_MOUNT_NOUUID; |
| break; |
| case Opt_ikeep: |
| mp->m_flags |= XFS_MOUNT_IKEEP; |
| break; |
| case Opt_noikeep: |
| mp->m_flags &= ~XFS_MOUNT_IKEEP; |
| break; |
| case Opt_largeio: |
| mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; |
| break; |
| case Opt_nolargeio: |
| mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; |
| break; |
| case Opt_attr2: |
| mp->m_flags |= XFS_MOUNT_ATTR2; |
| break; |
| case Opt_noattr2: |
| mp->m_flags &= ~XFS_MOUNT_ATTR2; |
| mp->m_flags |= XFS_MOUNT_NOATTR2; |
| break; |
| case Opt_filestreams: |
| mp->m_flags |= XFS_MOUNT_FILESTREAMS; |
| break; |
| case Opt_noquota: |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; |
| break; |
| case Opt_quota: |
| case Opt_uquota: |
| case Opt_usrquota: |
| mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | |
| XFS_UQUOTA_ENFD); |
| break; |
| case Opt_qnoenforce: |
| case Opt_uqnoenforce: |
| mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_UQUOTA_ENFD; |
| break; |
| case Opt_pquota: |
| case Opt_prjquota: |
| mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | |
| XFS_PQUOTA_ENFD); |
| break; |
| case Opt_pqnoenforce: |
| mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_PQUOTA_ENFD; |
| break; |
| case Opt_gquota: |
| case Opt_grpquota: |
| mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | |
| XFS_GQUOTA_ENFD); |
| break; |
| case Opt_gqnoenforce: |
| mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_GQUOTA_ENFD; |
| break; |
| case Opt_discard: |
| mp->m_flags |= XFS_MOUNT_DISCARD; |
| break; |
| case Opt_nodiscard: |
| mp->m_flags &= ~XFS_MOUNT_DISCARD; |
| break; |
| #ifdef CONFIG_FS_DAX |
| case Opt_dax: |
| mp->m_flags |= XFS_MOUNT_DAX; |
| break; |
| #endif |
| case Opt_barrier: |
| xfs_warn(mp, "%s option is deprecated, ignoring.", p); |
| mp->m_flags |= XFS_MOUNT_BARRIER; |
| break; |
| case Opt_nobarrier: |
| xfs_warn(mp, "%s option is deprecated, ignoring.", p); |
| mp->m_flags &= ~XFS_MOUNT_BARRIER; |
| break; |
| default: |
| xfs_warn(mp, "unknown mount option [%s].", p); |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * no recovery flag requires a read-only mount |
| */ |
| if ((mp->m_flags & XFS_MOUNT_NORECOVERY) && |
| !(mp->m_flags & XFS_MOUNT_RDONLY)) { |
| xfs_warn(mp, "no-recovery mounts must be read-only."); |
| return -EINVAL; |
| } |
| |
| if ((mp->m_flags & XFS_MOUNT_NOALIGN) && (dsunit || dswidth)) { |
| xfs_warn(mp, |
| "sunit and swidth options incompatible with the noalign option"); |
| return -EINVAL; |
| } |
| |
| #ifndef CONFIG_XFS_QUOTA |
| if (XFS_IS_QUOTA_RUNNING(mp)) { |
| xfs_warn(mp, "quota support not available in this kernel."); |
| return -EINVAL; |
| } |
| #endif |
| |
| if ((dsunit && !dswidth) || (!dsunit && dswidth)) { |
| xfs_warn(mp, "sunit and swidth must be specified together"); |
| return -EINVAL; |
| } |
| |
| if (dsunit && (dswidth % dsunit != 0)) { |
| xfs_warn(mp, |
| "stripe width (%d) must be a multiple of the stripe unit (%d)", |
| dswidth, dsunit); |
| return -EINVAL; |
| } |
| |
| done: |
| if (dsunit && !(mp->m_flags & XFS_MOUNT_NOALIGN)) { |
| /* |
| * At this point the superblock has not been read |
| * in, therefore we do not know the block size. |
| * Before the mount call ends we will convert |
| * these to FSBs. |
| */ |
| mp->m_dalign = dsunit; |
| mp->m_swidth = dswidth; |
| } |
| |
| if (mp->m_logbufs != -1 && |
| mp->m_logbufs != 0 && |
| (mp->m_logbufs < XLOG_MIN_ICLOGS || |
| mp->m_logbufs > XLOG_MAX_ICLOGS)) { |
| xfs_warn(mp, "invalid logbufs value: %d [not %d-%d]", |
| mp->m_logbufs, XLOG_MIN_ICLOGS, XLOG_MAX_ICLOGS); |
| return -EINVAL; |
| } |
| if (mp->m_logbsize != -1 && |
| mp->m_logbsize != 0 && |
| (mp->m_logbsize < XLOG_MIN_RECORD_BSIZE || |
| mp->m_logbsize > XLOG_MAX_RECORD_BSIZE || |
| !is_power_of_2(mp->m_logbsize))) { |
| xfs_warn(mp, |
| "invalid logbufsize: %d [not 16k,32k,64k,128k or 256k]", |
| mp->m_logbsize); |
| return -EINVAL; |
| } |
| |
| if (iosizelog) { |
| if (iosizelog > XFS_MAX_IO_LOG || |
| iosizelog < XFS_MIN_IO_LOG) { |
| xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", |
| iosizelog, XFS_MIN_IO_LOG, |
| XFS_MAX_IO_LOG); |
| return -EINVAL; |
| } |
| |
| mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; |
| mp->m_readio_log = iosizelog; |
| mp->m_writeio_log = iosizelog; |
| } |
| |
| return 0; |
| } |
| |
| struct proc_xfs_info { |
| uint64_t flag; |
| char *str; |
| }; |
| |
| STATIC int |
| xfs_showargs( |
| struct xfs_mount *mp, |
| struct seq_file *m) |
| { |
| static struct proc_xfs_info xfs_info_set[] = { |
| /* the few simple ones we can get from the mount struct */ |
| { XFS_MOUNT_IKEEP, ",ikeep" }, |
| { XFS_MOUNT_WSYNC, ",wsync" }, |
| { XFS_MOUNT_NOALIGN, ",noalign" }, |
| { XFS_MOUNT_SWALLOC, ",swalloc" }, |
| { XFS_MOUNT_NOUUID, ",nouuid" }, |
| { XFS_MOUNT_NORECOVERY, ",norecovery" }, |
| { XFS_MOUNT_ATTR2, ",attr2" }, |
| { XFS_MOUNT_FILESTREAMS, ",filestreams" }, |
| { XFS_MOUNT_GRPID, ",grpid" }, |
| { XFS_MOUNT_DISCARD, ",discard" }, |
| { XFS_MOUNT_SMALL_INUMS, ",inode32" }, |
| { XFS_MOUNT_DAX, ",dax" }, |
| { 0, NULL } |
| }; |
| static struct proc_xfs_info xfs_info_unset[] = { |
| /* the few simple ones we can get from the mount struct */ |
| { XFS_MOUNT_COMPAT_IOSIZE, ",largeio" }, |
| { XFS_MOUNT_BARRIER, ",nobarrier" }, |
| { XFS_MOUNT_SMALL_INUMS, ",inode64" }, |
| { 0, NULL } |
| }; |
| struct proc_xfs_info *xfs_infop; |
| |
| for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { |
| if (mp->m_flags & xfs_infop->flag) |
| seq_puts(m, xfs_infop->str); |
| } |
| for (xfs_infop = xfs_info_unset; xfs_infop->flag; xfs_infop++) { |
| if (!(mp->m_flags & xfs_infop->flag)) |
| seq_puts(m, xfs_infop->str); |
| } |
| |
| if (mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) |
| seq_printf(m, ",allocsize=%dk", |
| (int)(1 << mp->m_writeio_log) >> 10); |
| |
| if (mp->m_logbufs > 0) |
| seq_printf(m, ",logbufs=%d", mp->m_logbufs); |
| if (mp->m_logbsize > 0) |
| seq_printf(m, ",logbsize=%dk", mp->m_logbsize >> 10); |
| |
| if (mp->m_logname) |
| seq_show_option(m, "logdev", mp->m_logname); |
| if (mp->m_rtname) |
| seq_show_option(m, "rtdev", mp->m_rtname); |
| |
| if (mp->m_dalign > 0) |
| seq_printf(m, ",sunit=%d", |
| (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); |
| if (mp->m_swidth > 0) |
| seq_printf(m, ",swidth=%d", |
| (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); |
| |
| if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) |
| seq_puts(m, ",usrquota"); |
| else if (mp->m_qflags & XFS_UQUOTA_ACCT) |
| seq_puts(m, ",uqnoenforce"); |
| |
| if (mp->m_qflags & XFS_PQUOTA_ACCT) { |
| if (mp->m_qflags & XFS_PQUOTA_ENFD) |
| seq_puts(m, ",prjquota"); |
| else |
| seq_puts(m, ",pqnoenforce"); |
| } |
| if (mp->m_qflags & XFS_GQUOTA_ACCT) { |
| if (mp->m_qflags & XFS_GQUOTA_ENFD) |
| seq_puts(m, ",grpquota"); |
| else |
| seq_puts(m, ",gqnoenforce"); |
| } |
| |
| if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) |
| seq_puts(m, ",noquota"); |
| |
| return 0; |
| } |
| static __uint64_t |
| xfs_max_file_offset( |
| unsigned int blockshift) |
| { |
| unsigned int pagefactor = 1; |
| unsigned int bitshift = BITS_PER_LONG - 1; |
| |
| /* Figure out maximum filesize, on Linux this can depend on |
| * the filesystem blocksize (on 32 bit platforms). |
| * __block_write_begin does this in an [unsigned] long... |
| * page->index << (PAGE_SHIFT - bbits) |
| * So, for page sized blocks (4K on 32 bit platforms), |
| * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is |
| * (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1) |
| * but for smaller blocksizes it is less (bbits = log2 bsize). |
| * Note1: get_block_t takes a long (implicit cast from above) |
| * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch |
| * can optionally convert the [unsigned] long from above into |
| * an [unsigned] long long. |
| */ |
| |
| #if BITS_PER_LONG == 32 |
| # if defined(CONFIG_LBDAF) |
| ASSERT(sizeof(sector_t) == 8); |
| pagefactor = PAGE_SIZE; |
| bitshift = BITS_PER_LONG; |
| # else |
| pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift); |
| # endif |
| #endif |
| |
| return (((__uint64_t)pagefactor) << bitshift) - 1; |
| } |
| |
| /* |
| * Set parameters for inode allocation heuristics, taking into account |
| * filesystem size and inode32/inode64 mount options; i.e. specifically |
| * whether or not XFS_MOUNT_SMALL_INUMS is set. |
| * |
| * Inode allocation patterns are altered only if inode32 is requested |
| * (XFS_MOUNT_SMALL_INUMS), and the filesystem is sufficiently large. |
| * If altered, XFS_MOUNT_32BITINODES is set as well. |
| * |
| * An agcount independent of that in the mount structure is provided |
| * because in the growfs case, mp->m_sb.sb_agcount is not yet updated |
| * to the potentially higher ag count. |
| * |
| * Returns the maximum AG index which may contain inodes. |
| */ |
| xfs_agnumber_t |
| xfs_set_inode_alloc( |
| struct xfs_mount *mp, |
| xfs_agnumber_t agcount) |
| { |
| xfs_agnumber_t index; |
| xfs_agnumber_t maxagi = 0; |
| xfs_sb_t *sbp = &mp->m_sb; |
| xfs_agnumber_t max_metadata; |
| xfs_agino_t agino; |
| xfs_ino_t ino; |
| |
| /* |
| * Calculate how much should be reserved for inodes to meet |
| * the max inode percentage. Used only for inode32. |
| */ |
| if (mp->m_maxicount) { |
| __uint64_t icount; |
| |
| icount = sbp->sb_dblocks * sbp->sb_imax_pct; |
| do_div(icount, 100); |
| icount += sbp->sb_agblocks - 1; |
| do_div(icount, sbp->sb_agblocks); |
| max_metadata = icount; |
| } else { |
| max_metadata = agcount; |
| } |
| |
| /* Get the last possible inode in the filesystem */ |
| agino = XFS_OFFBNO_TO_AGINO(mp, sbp->sb_agblocks - 1, 0); |
| ino = XFS_AGINO_TO_INO(mp, agcount - 1, agino); |
| |
| /* |
| * If user asked for no more than 32-bit inodes, and the fs is |
| * sufficiently large, set XFS_MOUNT_32BITINODES if we must alter |
| * the allocator to accommodate the request. |
| */ |
| if ((mp->m_flags & XFS_MOUNT_SMALL_INUMS) && ino > XFS_MAXINUMBER_32) |
| mp->m_flags |= XFS_MOUNT_32BITINODES; |
| else |
| mp->m_flags &= ~XFS_MOUNT_32BITINODES; |
| |
| for (index = 0; index < agcount; index++) { |
| struct xfs_perag *pag; |
| |
| ino = XFS_AGINO_TO_INO(mp, index, agino); |
| |
| pag = xfs_perag_get(mp, index); |
| |
| if (mp->m_flags & XFS_MOUNT_32BITINODES) { |
| if (ino > XFS_MAXINUMBER_32) { |
| pag->pagi_inodeok = 0; |
| pag->pagf_metadata = 0; |
| } else { |
| pag->pagi_inodeok = 1; |
| maxagi++; |
| if (index < max_metadata) |
| pag->pagf_metadata = 1; |
| else |
| pag->pagf_metadata = 0; |
| } |
| } else { |
| pag->pagi_inodeok = 1; |
| pag->pagf_metadata = 0; |
| } |
| |
| xfs_perag_put(pag); |
| } |
| |
| return (mp->m_flags & XFS_MOUNT_32BITINODES) ? maxagi : agcount; |
| } |
| |
| STATIC int |
| xfs_blkdev_get( |
| xfs_mount_t *mp, |
| const char *name, |
| struct block_device **bdevp) |
| { |
| int error = 0; |
| |
| *bdevp = blkdev_get_by_path(name, FMODE_READ|FMODE_WRITE|FMODE_EXCL, |
| mp); |
| if (IS_ERR(*bdevp)) { |
| error = PTR_ERR(*bdevp); |
| xfs_warn(mp, "Invalid device [%s], error=%d", name, error); |
| } |
| |
| return error; |
| } |
| |
| STATIC void |
| xfs_blkdev_put( |
| struct block_device *bdev) |
| { |
| if (bdev) |
| blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); |
| } |
| |
| void |
| xfs_blkdev_issue_flush( |
| xfs_buftarg_t *buftarg) |
| { |
| blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL); |
| } |
| |
| STATIC void |
| xfs_close_devices( |
| struct xfs_mount *mp) |
| { |
| if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { |
| struct block_device *logdev = mp->m_logdev_targp->bt_bdev; |
| xfs_free_buftarg(mp, mp->m_logdev_targp); |
| xfs_blkdev_put(logdev); |
| } |
| if (mp->m_rtdev_targp) { |
| struct block_device *rtdev = mp->m_rtdev_targp->bt_bdev; |
| xfs_free_buftarg(mp, mp->m_rtdev_targp); |
| xfs_blkdev_put(rtdev); |
| } |
| xfs_free_buftarg(mp, mp->m_ddev_targp); |
| } |
| |
| /* |
| * The file system configurations are: |
| * (1) device (partition) with data and internal log |
| * (2) logical volume with data and log subvolumes. |
| * (3) logical volume with data, log, and realtime subvolumes. |
| * |
| * We only have to handle opening the log and realtime volumes here if |
| * they are present. The data subvolume has already been opened by |
| * get_sb_bdev() and is stored in sb->s_bdev. |
| */ |
| STATIC int |
| xfs_open_devices( |
| struct xfs_mount *mp) |
| { |
| struct block_device *ddev = mp->m_super->s_bdev; |
| struct block_device *logdev = NULL, *rtdev = NULL; |
| int error; |
| |
| /* |
| * Open real time and log devices - order is important. |
| */ |
| if (mp->m_logname) { |
| error = xfs_blkdev_get(mp, mp->m_logname, &logdev); |
| if (error) |
| goto out; |
| } |
| |
| if (mp->m_rtname) { |
| error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev); |
| if (error) |
| goto out_close_logdev; |
| |
| if (rtdev == ddev || rtdev == logdev) { |
| xfs_warn(mp, |
| "Cannot mount filesystem with identical rtdev and ddev/logdev."); |
| error = -EINVAL; |
| goto out_close_rtdev; |
| } |
| } |
| |
| /* |
| * Setup xfs_mount buffer target pointers |
| */ |
| error = -ENOMEM; |
| mp->m_ddev_targp = xfs_alloc_buftarg(mp, ddev); |
| if (!mp->m_ddev_targp) |
| goto out_close_rtdev; |
| |
| if (rtdev) { |
| mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev); |
| if (!mp->m_rtdev_targp) |
| goto out_free_ddev_targ; |
| } |
| |
| if (logdev && logdev != ddev) { |
| mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev); |
| if (!mp->m_logdev_targp) |
| goto out_free_rtdev_targ; |
| } else { |
| mp->m_logdev_targp = mp->m_ddev_targp; |
| } |
| |
| return 0; |
| |
| out_free_rtdev_targ: |
| if (mp->m_rtdev_targp) |
| xfs_free_buftarg(mp, mp->m_rtdev_targp); |
| out_free_ddev_targ: |
| xfs_free_buftarg(mp, mp->m_ddev_targp); |
| out_close_rtdev: |
| xfs_blkdev_put(rtdev); |
| out_close_logdev: |
| if (logdev && logdev != ddev) |
| xfs_blkdev_put(logdev); |
| out: |
| return error; |
| } |
| |
| /* |
| * Setup xfs_mount buffer target pointers based on superblock |
| */ |
| STATIC int |
| xfs_setup_devices( |
| struct xfs_mount *mp) |
| { |
| int error; |
| |
| error = xfs_setsize_buftarg(mp->m_ddev_targp, mp->m_sb.sb_sectsize); |
| if (error) |
| return error; |
| |
| if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { |
| unsigned int log_sector_size = BBSIZE; |
| |
| if (xfs_sb_version_hassector(&mp->m_sb)) |
| log_sector_size = mp->m_sb.sb_logsectsize; |
| error = xfs_setsize_buftarg(mp->m_logdev_targp, |
| log_sector_size); |
| if (error) |
| return error; |
| } |
| if (mp->m_rtdev_targp) { |
| error = xfs_setsize_buftarg(mp->m_rtdev_targp, |
| mp->m_sb.sb_sectsize); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_init_mount_workqueues( |
| struct xfs_mount *mp) |
| { |
| mp->m_buf_workqueue = alloc_workqueue("xfs-buf/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 1, mp->m_fsname); |
| if (!mp->m_buf_workqueue) |
| goto out; |
| |
| mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); |
| if (!mp->m_data_workqueue) |
| goto out_destroy_buf; |
| |
| mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); |
| if (!mp->m_unwritten_workqueue) |
| goto out_destroy_data_iodone_queue; |
| |
| mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); |
| if (!mp->m_cil_workqueue) |
| goto out_destroy_unwritten; |
| |
| mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); |
| if (!mp->m_reclaim_workqueue) |
| goto out_destroy_cil; |
| |
| mp->m_log_workqueue = alloc_workqueue("xfs-log/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0, |
| mp->m_fsname); |
| if (!mp->m_log_workqueue) |
| goto out_destroy_reclaim; |
| |
| mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname); |
| if (!mp->m_eofblocks_workqueue) |
| goto out_destroy_log; |
| |
| mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0, |
| mp->m_fsname); |
| if (!mp->m_sync_workqueue) |
| goto out_destroy_eofb; |
| |
| return 0; |
| |
| out_destroy_eofb: |
| destroy_workqueue(mp->m_eofblocks_workqueue); |
| out_destroy_log: |
| destroy_workqueue(mp->m_log_workqueue); |
| out_destroy_reclaim: |
| destroy_workqueue(mp->m_reclaim_workqueue); |
| out_destroy_cil: |
| destroy_workqueue(mp->m_cil_workqueue); |
| out_destroy_unwritten: |
| destroy_workqueue(mp->m_unwritten_workqueue); |
| out_destroy_data_iodone_queue: |
| destroy_workqueue(mp->m_data_workqueue); |
| out_destroy_buf: |
| destroy_workqueue(mp->m_buf_workqueue); |
| out: |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_mount_workqueues( |
| struct xfs_mount *mp) |
| { |
| destroy_workqueue(mp->m_sync_workqueue); |
| destroy_workqueue(mp->m_eofblocks_workqueue); |
| destroy_workqueue(mp->m_log_workqueue); |
| destroy_workqueue(mp->m_reclaim_workqueue); |
| destroy_workqueue(mp->m_cil_workqueue); |
| destroy_workqueue(mp->m_data_workqueue); |
| destroy_workqueue(mp->m_unwritten_workqueue); |
| destroy_workqueue(mp->m_buf_workqueue); |
| } |
| |
| /* |
| * Flush all dirty data to disk. Must not be called while holding an XFS_ILOCK |
| * or a page lock. We use sync_inodes_sb() here to ensure we block while waiting |
| * for IO to complete so that we effectively throttle multiple callers to the |
| * rate at which IO is completing. |
| */ |
| void |
| xfs_flush_inodes( |
| struct xfs_mount *mp) |
| { |
| struct super_block *sb = mp->m_super; |
| |
| if (down_read_trylock(&sb->s_umount)) { |
| sync_inodes_sb(sb); |
| up_read(&sb->s_umount); |
| } |
| } |
| |
| /* Catch misguided souls that try to use this interface on XFS */ |
| STATIC struct inode * |
| xfs_fs_alloc_inode( |
| struct super_block *sb) |
| { |
| BUG(); |
| return NULL; |
| } |
| |
| /* |
| * Now that the generic code is guaranteed not to be accessing |
| * the linux inode, we can inactivate and reclaim the inode. |
| */ |
| STATIC void |
| xfs_fs_destroy_inode( |
| struct inode *inode) |
| { |
| struct xfs_inode *ip = XFS_I(inode); |
| int error; |
| |
| trace_xfs_destroy_inode(ip); |
| |
| ASSERT(!rwsem_is_locked(&inode->i_rwsem)); |
| XFS_STATS_INC(ip->i_mount, vn_rele); |
| XFS_STATS_INC(ip->i_mount, vn_remove); |
| |
| if (xfs_is_reflink_inode(ip)) { |
| error = xfs_reflink_cancel_cow_range(ip, 0, NULLFILEOFF, true); |
| if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| xfs_warn(ip->i_mount, |
| "Error %d while evicting CoW blocks for inode %llu.", |
| error, ip->i_ino); |
| } |
| |
| xfs_inactive(ip); |
| |
| ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
| XFS_STATS_INC(ip->i_mount, vn_reclaim); |
| |
| /* |
| * We should never get here with one of the reclaim flags already set. |
| */ |
| ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIMABLE)); |
| ASSERT_ALWAYS(!xfs_iflags_test(ip, XFS_IRECLAIM)); |
| |
| /* |
| * We always use background reclaim here because even if the |
| * inode is clean, it still may be under IO and hence we have |
| * to take the flush lock. The background reclaim path handles |
| * this more efficiently than we can here, so simply let background |
| * reclaim tear down all inodes. |
| */ |
| xfs_inode_set_reclaim_tag(ip); |
| } |
| |
| /* |
| * Slab object creation initialisation for the XFS inode. |
| * This covers only the idempotent fields in the XFS inode; |
| * all other fields need to be initialised on allocation |
| * from the slab. This avoids the need to repeatedly initialise |
| * fields in the xfs inode that left in the initialise state |
| * when freeing the inode. |
| */ |
| STATIC void |
| xfs_fs_inode_init_once( |
| void *inode) |
| { |
| struct xfs_inode *ip = inode; |
| |
| memset(ip, 0, sizeof(struct xfs_inode)); |
| |
| /* vfs inode */ |
| inode_init_once(VFS_I(ip)); |
| |
| /* xfs inode */ |
| atomic_set(&ip->i_pincount, 0); |
| spin_lock_init(&ip->i_flags_lock); |
| |
| mrlock_init(&ip->i_mmaplock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, |
| "xfsino", ip->i_ino); |
| mrlock_init(&ip->i_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, |
| "xfsino", ip->i_ino); |
| } |
| |
| /* |
| * We do an unlocked check for XFS_IDONTCACHE here because we are already |
| * serialised against cache hits here via the inode->i_lock and igrab() in |
| * xfs_iget_cache_hit(). Hence a lookup that might clear this flag will not be |
| * racing with us, and it avoids needing to grab a spinlock here for every inode |
| * we drop the final reference on. |
| */ |
| STATIC int |
| xfs_fs_drop_inode( |
| struct inode *inode) |
| { |
| struct xfs_inode *ip = XFS_I(inode); |
| |
| /* |
| * If this unlinked inode is in the middle of recovery, don't |
| * drop the inode just yet; log recovery will take care of |
| * that. See the comment for this inode flag. |
| */ |
| if (ip->i_flags & XFS_IRECOVERY) { |
| ASSERT(ip->i_mount->m_log->l_flags & XLOG_RECOVERY_NEEDED); |
| return 0; |
| } |
| |
| return generic_drop_inode(inode) || (ip->i_flags & XFS_IDONTCACHE); |
| } |
| |
| STATIC void |
| xfs_free_fsname( |
| struct xfs_mount *mp) |
| { |
| kfree(mp->m_fsname); |
| kfree(mp->m_rtname); |
| kfree(mp->m_logname); |
| } |
| |
| STATIC int |
| xfs_fs_sync_fs( |
| struct super_block *sb, |
| int wait) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| /* |
| * Doing anything during the async pass would be counterproductive. |
| */ |
| if (!wait) |
| return 0; |
| |
| xfs_log_force(mp, XFS_LOG_SYNC); |
| if (laptop_mode) { |
| /* |
| * The disk must be active because we're syncing. |
| * We schedule log work now (now that the disk is |
| * active) instead of later (when it might not be). |
| */ |
| flush_delayed_work(&mp->m_log->l_work); |
| } |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_fs_statfs( |
| struct dentry *dentry, |
| struct kstatfs *statp) |
| { |
| struct xfs_mount *mp = XFS_M(dentry->d_sb); |
| xfs_sb_t *sbp = &mp->m_sb; |
| struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
| __uint64_t fakeinos, id; |
| __uint64_t icount; |
| __uint64_t ifree; |
| __uint64_t fdblocks; |
| xfs_extlen_t lsize; |
| __int64_t ffree; |
| |
| statp->f_type = XFS_SB_MAGIC; |
| statp->f_namelen = MAXNAMELEN - 1; |
| |
| id = huge_encode_dev(mp->m_ddev_targp->bt_dev); |
| statp->f_fsid.val[0] = (u32)id; |
| statp->f_fsid.val[1] = (u32)(id >> 32); |
| |
| icount = percpu_counter_sum(&mp->m_icount); |
| ifree = percpu_counter_sum(&mp->m_ifree); |
| fdblocks = percpu_counter_sum(&mp->m_fdblocks); |
| |
| spin_lock(&mp->m_sb_lock); |
| statp->f_bsize = sbp->sb_blocksize; |
| lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; |
| statp->f_blocks = sbp->sb_dblocks - lsize; |
| spin_unlock(&mp->m_sb_lock); |
| |
| statp->f_bfree = fdblocks - mp->m_alloc_set_aside; |
| statp->f_bavail = statp->f_bfree; |
| |
| fakeinos = statp->f_bfree << sbp->sb_inopblog; |
| statp->f_files = MIN(icount + fakeinos, (__uint64_t)XFS_MAXINUMBER); |
| if (mp->m_maxicount) |
| statp->f_files = min_t(typeof(statp->f_files), |
| statp->f_files, |
| mp->m_maxicount); |
| |
| /* If sb_icount overshot maxicount, report actual allocation */ |
| statp->f_files = max_t(typeof(statp->f_files), |
| statp->f_files, |
| sbp->sb_icount); |
| |
| /* make sure statp->f_ffree does not underflow */ |
| ffree = statp->f_files - (icount - ifree); |
| statp->f_ffree = max_t(__int64_t, ffree, 0); |
| |
| |
| if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
| ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == |
| (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) |
| xfs_qm_statvfs(ip, statp); |
| return 0; |
| } |
| |
| STATIC void |
| xfs_save_resvblks(struct xfs_mount *mp) |
| { |
| __uint64_t resblks = 0; |
| |
| mp->m_resblks_save = mp->m_resblks; |
| xfs_reserve_blocks(mp, &resblks, NULL); |
| } |
| |
| STATIC void |
| xfs_restore_resvblks(struct xfs_mount *mp) |
| { |
| __uint64_t resblks; |
| |
| if (mp->m_resblks_save) { |
| resblks = mp->m_resblks_save; |
| mp->m_resblks_save = 0; |
| } else |
| resblks = xfs_default_resblks(mp); |
| |
| xfs_reserve_blocks(mp, &resblks, NULL); |
| } |
| |
| /* |
| * Trigger writeback of all the dirty metadata in the file system. |
| * |
| * This ensures that the metadata is written to their location on disk rather |
| * than just existing in transactions in the log. This means after a quiesce |
| * there is no log replay required to write the inodes to disk - this is the |
| * primary difference between a sync and a quiesce. |
| * |
| * Note: xfs_log_quiesce() stops background log work - the callers must ensure |
| * it is started again when appropriate. |
| */ |
| void |
| xfs_quiesce_attr( |
| struct xfs_mount *mp) |
| { |
| int error = 0; |
| |
| /* wait for all modifications to complete */ |
| while (atomic_read(&mp->m_active_trans) > 0) |
| delay(100); |
| |
| /* force the log to unpin objects from the now complete transactions */ |
| xfs_log_force(mp, XFS_LOG_SYNC); |
| |
| /* reclaim inodes to do any IO before the freeze completes */ |
| xfs_reclaim_inodes(mp, 0); |
| xfs_reclaim_inodes(mp, SYNC_WAIT); |
| |
| /* Push the superblock and write an unmount record */ |
| error = xfs_log_sbcount(mp); |
| if (error) |
| xfs_warn(mp, "xfs_attr_quiesce: failed to log sb changes. " |
| "Frozen image may not be consistent."); |
| /* |
| * Just warn here till VFS can correctly support |
| * read-only remount without racing. |
| */ |
| WARN_ON(atomic_read(&mp->m_active_trans) != 0); |
| |
| xfs_log_quiesce(mp); |
| } |
| |
| STATIC int |
| xfs_test_remount_options( |
| struct super_block *sb, |
| struct xfs_mount *mp, |
| char *options) |
| { |
| int error = 0; |
| struct xfs_mount *tmp_mp; |
| |
| tmp_mp = kmem_zalloc(sizeof(*tmp_mp), KM_MAYFAIL); |
| if (!tmp_mp) |
| return -ENOMEM; |
| |
| tmp_mp->m_super = sb; |
| error = xfs_parseargs(tmp_mp, options); |
| xfs_free_fsname(tmp_mp); |
| kfree(tmp_mp); |
| |
| return error; |
| } |
| |
| STATIC int |
| xfs_fs_remount( |
| struct super_block *sb, |
| int *flags, |
| char *options) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| xfs_sb_t *sbp = &mp->m_sb; |
| substring_t args[MAX_OPT_ARGS]; |
| char *p; |
| int error; |
| |
| /* First, check for complete junk; i.e. invalid options */ |
| error = xfs_test_remount_options(sb, mp, options); |
| if (error) |
| return error; |
| |
| sync_filesystem(sb); |
| while ((p = strsep(&options, ",")) != NULL) { |
| int token; |
| |
| if (!*p) |
| continue; |
| |
| token = match_token(p, tokens, args); |
| switch (token) { |
| case Opt_barrier: |
| xfs_warn(mp, "%s option is deprecated, ignoring.", p); |
| mp->m_flags |= XFS_MOUNT_BARRIER; |
| break; |
| case Opt_nobarrier: |
| xfs_warn(mp, "%s option is deprecated, ignoring.", p); |
| mp->m_flags &= ~XFS_MOUNT_BARRIER; |
| break; |
| case Opt_inode64: |
| mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; |
| mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); |
| break; |
| case Opt_inode32: |
| mp->m_flags |= XFS_MOUNT_SMALL_INUMS; |
| mp->m_maxagi = xfs_set_inode_alloc(mp, sbp->sb_agcount); |
| break; |
| default: |
| /* |
| * Logically we would return an error here to prevent |
| * users from believing they might have changed |
| * mount options using remount which can't be changed. |
| * |
| * But unfortunately mount(8) adds all options from |
| * mtab and fstab to the mount arguments in some cases |
| * so we can't blindly reject options, but have to |
| * check for each specified option if it actually |
| * differs from the currently set option and only |
| * reject it if that's the case. |
| * |
| * Until that is implemented we return success for |
| * every remount request, and silently ignore all |
| * options that we can't actually change. |
| */ |
| #if 0 |
| xfs_info(mp, |
| "mount option \"%s\" not supported for remount", p); |
| return -EINVAL; |
| #else |
| break; |
| #endif |
| } |
| } |
| |
| /* ro -> rw */ |
| if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { |
| if (mp->m_flags & XFS_MOUNT_NORECOVERY) { |
| xfs_warn(mp, |
| "ro->rw transition prohibited on norecovery mount"); |
| return -EINVAL; |
| } |
| |
| if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
| xfs_sb_has_ro_compat_feature(sbp, |
| XFS_SB_FEAT_RO_COMPAT_UNKNOWN)) { |
| xfs_warn(mp, |
| "ro->rw transition prohibited on unknown (0x%x) ro-compat filesystem", |
| (sbp->sb_features_ro_compat & |
| XFS_SB_FEAT_RO_COMPAT_UNKNOWN)); |
| return -EINVAL; |
| } |
| |
| mp->m_flags &= ~XFS_MOUNT_RDONLY; |
| |
| /* |
| * If this is the first remount to writeable state we |
| * might have some superblock changes to update. |
| */ |
| if (mp->m_update_sb) { |
| error = xfs_sync_sb(mp, false); |
| if (error) { |
| xfs_warn(mp, "failed to write sb changes"); |
| return error; |
| } |
| mp->m_update_sb = false; |
| } |
| |
| /* |
| * Fill out the reserve pool if it is empty. Use the stashed |
| * value if it is non-zero, otherwise go with the default. |
| */ |
| xfs_restore_resvblks(mp); |
| xfs_log_work_queue(mp); |
| xfs_queue_eofblocks(mp); |
| |
| /* Recover any CoW blocks that never got remapped. */ |
| error = xfs_reflink_recover_cow(mp); |
| if (error) { |
| xfs_err(mp, |
| "Error %d recovering leftover CoW allocations.", error); |
| xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
| return error; |
| } |
| |
| /* Create the per-AG metadata reservation pool .*/ |
| error = xfs_fs_reserve_ag_blocks(mp); |
| if (error && error != -ENOSPC) |
| return error; |
| } |
| |
| /* rw -> ro */ |
| if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { |
| /* Free the per-AG metadata reservation pool. */ |
| error = xfs_fs_unreserve_ag_blocks(mp); |
| if (error) { |
| xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); |
| return error; |
| } |
| |
| /* |
| * Before we sync the metadata, we need to free up the reserve |
| * block pool so that the used block count in the superblock on |
| * disk is correct at the end of the remount. Stash the current |
| * reserve pool size so that if we get remounted rw, we can |
| * return it to the same size. |
| */ |
| xfs_save_resvblks(mp); |
| |
| /* |
| * Cancel background eofb scanning so it cannot race with the |
| * final log force+buftarg wait and deadlock the remount. |
| */ |
| cancel_delayed_work_sync(&mp->m_eofblocks_work); |
| |
| xfs_quiesce_attr(mp); |
| mp->m_flags |= XFS_MOUNT_RDONLY; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * Second stage of a freeze. The data is already frozen so we only |
| * need to take care of the metadata. Once that's done sync the superblock |
| * to the log to dirty it in case of a crash while frozen. This ensures that we |
| * will recover the unlinked inode lists on the next mount. |
| */ |
| STATIC int |
| xfs_fs_freeze( |
| struct super_block *sb) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| xfs_save_resvblks(mp); |
| xfs_quiesce_attr(mp); |
| return xfs_sync_sb(mp, true); |
| } |
| |
| STATIC int |
| xfs_fs_unfreeze( |
| struct super_block *sb) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| xfs_restore_resvblks(mp); |
| xfs_log_work_queue(mp); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_fs_show_options( |
| struct seq_file *m, |
| struct dentry *root) |
| { |
| return xfs_showargs(XFS_M(root->d_sb), m); |
| } |
| |
| /* |
| * This function fills in xfs_mount_t fields based on mount args. |
| * Note: the superblock _has_ now been read in. |
| */ |
| STATIC int |
| xfs_finish_flags( |
| struct xfs_mount *mp) |
| { |
| int ronly = (mp->m_flags & XFS_MOUNT_RDONLY); |
| |
| /* Fail a mount where the logbuf is smaller than the log stripe */ |
| if (xfs_sb_version_haslogv2(&mp->m_sb)) { |
| if (mp->m_logbsize <= 0 && |
| mp->m_sb.sb_logsunit > XLOG_BIG_RECORD_BSIZE) { |
| mp->m_logbsize = mp->m_sb.sb_logsunit; |
| } else if (mp->m_logbsize > 0 && |
| mp->m_logbsize < mp->m_sb.sb_logsunit) { |
| xfs_warn(mp, |
| "logbuf size must be greater than or equal to log stripe size"); |
| return -EINVAL; |
| } |
| } else { |
| /* Fail a mount if the logbuf is larger than 32K */ |
| if (mp->m_logbsize > XLOG_BIG_RECORD_BSIZE) { |
| xfs_warn(mp, |
| "logbuf size for version 1 logs must be 16K or 32K"); |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * V5 filesystems always use attr2 format for attributes. |
| */ |
| if (xfs_sb_version_hascrc(&mp->m_sb) && |
| (mp->m_flags & XFS_MOUNT_NOATTR2)) { |
| xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " |
| "attr2 is always enabled for V5 filesystems."); |
| return -EINVAL; |
| } |
| |
| /* |
| * mkfs'ed attr2 will turn on attr2 mount unless explicitly |
| * told by noattr2 to turn it off |
| */ |
| if (xfs_sb_version_hasattr2(&mp->m_sb) && |
| !(mp->m_flags & XFS_MOUNT_NOATTR2)) |
| mp->m_flags |= XFS_MOUNT_ATTR2; |
| |
| /* |
| * prohibit r/w mounts of read-only filesystems |
| */ |
| if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !ronly) { |
| xfs_warn(mp, |
| "cannot mount a read-only filesystem as read-write"); |
| return -EROFS; |
| } |
| |
| if ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && |
| (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE)) && |
| !xfs_sb_version_has_pquotino(&mp->m_sb)) { |
| xfs_warn(mp, |
| "Super block does not support project and group quota together"); |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| xfs_init_percpu_counters( |
| struct xfs_mount *mp) |
| { |
| int error; |
| |
| error = percpu_counter_init(&mp->m_icount, 0, GFP_KERNEL); |
| if (error) |
| return -ENOMEM; |
| |
| error = percpu_counter_init(&mp->m_ifree, 0, GFP_KERNEL); |
| if (error) |
| goto free_icount; |
| |
| error = percpu_counter_init(&mp->m_fdblocks, 0, GFP_KERNEL); |
| if (error) |
| goto free_ifree; |
| |
| return 0; |
| |
| free_ifree: |
| percpu_counter_destroy(&mp->m_ifree); |
| free_icount: |
| percpu_counter_destroy(&mp->m_icount); |
| return -ENOMEM; |
| } |
| |
| void |
| xfs_reinit_percpu_counters( |
| struct xfs_mount *mp) |
| { |
| percpu_counter_set(&mp->m_icount, mp->m_sb.sb_icount); |
| percpu_counter_set(&mp->m_ifree, mp->m_sb.sb_ifree); |
| percpu_counter_set(&mp->m_fdblocks, mp->m_sb.sb_fdblocks); |
| } |
| |
| static void |
| xfs_destroy_percpu_counters( |
| struct xfs_mount *mp) |
| { |
| percpu_counter_destroy(&mp->m_icount); |
| percpu_counter_destroy(&mp->m_ifree); |
| percpu_counter_destroy(&mp->m_fdblocks); |
| } |
| |
| STATIC int |
| xfs_fs_fill_super( |
| struct super_block *sb, |
| void *data, |
| int silent) |
| { |
| struct inode *root; |
| struct xfs_mount *mp = NULL; |
| int flags = 0, error = -ENOMEM; |
| |
| mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL); |
| if (!mp) |
| goto out; |
| |
| spin_lock_init(&mp->m_sb_lock); |
| mutex_init(&mp->m_growlock); |
| atomic_set(&mp->m_active_trans, 0); |
| INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); |
| INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker); |
| INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker); |
| mp->m_kobj.kobject.kset = xfs_kset; |
| |
| mp->m_super = sb; |
| sb->s_fs_info = mp; |
| |
| error = xfs_parseargs(mp, (char *)data); |
| if (error) |
| goto out_free_fsname; |
| |
| sb_min_blocksize(sb, BBSIZE); |
| sb->s_xattr = xfs_xattr_handlers; |
| sb->s_export_op = &xfs_export_operations; |
| #ifdef CONFIG_XFS_QUOTA |
| sb->s_qcop = &xfs_quotactl_operations; |
| sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ; |
| #endif |
| sb->s_op = &xfs_super_operations; |
| |
| if (silent) |
| flags |= XFS_MFSI_QUIET; |
| |
| error = xfs_open_devices(mp); |
| if (error) |
| goto out_free_fsname; |
| |
| error = xfs_init_mount_workqueues(mp); |
| if (error) |
| goto out_close_devices; |
| |
| error = xfs_init_percpu_counters(mp); |
| if (error) |
| goto out_destroy_workqueues; |
| |
| /* Allocate stats memory before we do operations that might use it */ |
| mp->m_stats.xs_stats = alloc_percpu(struct xfsstats); |
| if (!mp->m_stats.xs_stats) { |
| error = -ENOMEM; |
| goto out_destroy_counters; |
| } |
| |
| error = xfs_readsb(mp, flags); |
| if (error) |
| goto out_free_stats; |
| |
| error = xfs_finish_flags(mp); |
| if (error) |
| goto out_free_sb; |
| |
| error = xfs_setup_devices(mp); |
| if (error) |
| goto out_free_sb; |
| |
| error = xfs_filestream_mount(mp); |
| if (error) |
| goto out_free_sb; |
| |
| /* |
| * we must configure the block size in the superblock before we run the |
| * full mount process as the mount process can lookup and cache inodes. |
| */ |
| sb->s_magic = XFS_SB_MAGIC; |
| sb->s_blocksize = mp->m_sb.sb_blocksize; |
| sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; |
| sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); |
| sb->s_max_links = XFS_MAXLINK; |
| sb->s_time_gran = 1; |
| set_posix_acl_flag(sb); |
| |
| /* version 5 superblocks support inode version counters. */ |
| if (XFS_SB_VERSION_NUM(&mp->m_sb) == XFS_SB_VERSION_5) |
| sb->s_flags |= MS_I_VERSION; |
| |
| if (mp->m_flags & XFS_MOUNT_DAX) { |
| xfs_warn(mp, |
| "DAX enabled. Warning: EXPERIMENTAL, use at your own risk"); |
| |
| error = bdev_dax_supported(sb, sb->s_blocksize); |
| if (error) { |
| xfs_alert(mp, |
| "DAX unsupported by block device. Turning off DAX."); |
| mp->m_flags &= ~XFS_MOUNT_DAX; |
| } |
| if (xfs_sb_version_hasreflink(&mp->m_sb)) |
| xfs_alert(mp, |
| "DAX and reflink have not been tested together!"); |
| } |
| |
| if (xfs_sb_version_hasrmapbt(&mp->m_sb)) { |
| if (mp->m_sb.sb_rblocks) { |
| xfs_alert(mp, |
| "EXPERIMENTAL reverse mapping btree not compatible with realtime device!"); |
| error = -EINVAL; |
| goto out_filestream_unmount; |
| } |
| xfs_alert(mp, |
| "EXPERIMENTAL reverse mapping btree feature enabled. Use at your own risk!"); |
| } |
| |
| if (xfs_sb_version_hasreflink(&mp->m_sb)) |
| xfs_alert(mp, |
| "EXPERIMENTAL reflink feature enabled. Use at your own risk!"); |
| |
| error = xfs_mountfs(mp); |
| if (error) |
| goto out_filestream_unmount; |
| |
| root = igrab(VFS_I(mp->m_rootip)); |
| if (!root) { |
| error = -ENOENT; |
| goto out_unmount; |
| } |
| sb->s_root = d_make_root(root); |
| if (!sb->s_root) { |
| error = -ENOMEM; |
| goto out_unmount; |
| } |
| |
| return 0; |
| |
| out_filestream_unmount: |
| xfs_filestream_unmount(mp); |
| out_free_sb: |
| xfs_freesb(mp); |
| out_free_stats: |
| free_percpu(mp->m_stats.xs_stats); |
| out_destroy_counters: |
| xfs_destroy_percpu_counters(mp); |
| out_destroy_workqueues: |
| xfs_destroy_mount_workqueues(mp); |
| out_close_devices: |
| xfs_close_devices(mp); |
| out_free_fsname: |
| xfs_free_fsname(mp); |
| kfree(mp); |
| out: |
| return error; |
| |
| out_unmount: |
| xfs_filestream_unmount(mp); |
| xfs_unmountfs(mp); |
| goto out_free_sb; |
| } |
| |
| STATIC void |
| xfs_fs_put_super( |
| struct super_block *sb) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| xfs_notice(mp, "Unmounting Filesystem"); |
| xfs_filestream_unmount(mp); |
| xfs_unmountfs(mp); |
| |
| xfs_freesb(mp); |
| free_percpu(mp->m_stats.xs_stats); |
| xfs_destroy_percpu_counters(mp); |
| xfs_destroy_mount_workqueues(mp); |
| xfs_close_devices(mp); |
| xfs_free_fsname(mp); |
| kfree(mp); |
| } |
| |
| STATIC struct dentry * |
| xfs_fs_mount( |
| struct file_system_type *fs_type, |
| int flags, |
| const char *dev_name, |
| void *data) |
| { |
| return mount_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super); |
| } |
| |
| static long |
| xfs_fs_nr_cached_objects( |
| struct super_block *sb, |
| struct shrink_control *sc) |
| { |
| return xfs_reclaim_inodes_count(XFS_M(sb)); |
| } |
| |
| static long |
| xfs_fs_free_cached_objects( |
| struct super_block *sb, |
| struct shrink_control *sc) |
| { |
| return xfs_reclaim_inodes_nr(XFS_M(sb), sc->nr_to_scan); |
| } |
| |
| static const struct super_operations xfs_super_operations = { |
| .alloc_inode = xfs_fs_alloc_inode, |
| .destroy_inode = xfs_fs_destroy_inode, |
| .drop_inode = xfs_fs_drop_inode, |
| .put_super = xfs_fs_put_super, |
| .sync_fs = xfs_fs_sync_fs, |
| .freeze_fs = xfs_fs_freeze, |
| .unfreeze_fs = xfs_fs_unfreeze, |
| .statfs = xfs_fs_statfs, |
| .remount_fs = xfs_fs_remount, |
| .show_options = xfs_fs_show_options, |
| .nr_cached_objects = xfs_fs_nr_cached_objects, |
| .free_cached_objects = xfs_fs_free_cached_objects, |
| }; |
| |
| static struct file_system_type xfs_fs_type = { |
| .owner = THIS_MODULE, |
| .name = "xfs", |
| .mount = xfs_fs_mount, |
| .kill_sb = kill_block_super, |
| .fs_flags = FS_REQUIRES_DEV, |
| }; |
| MODULE_ALIAS_FS("xfs"); |
| |
| STATIC int __init |
| xfs_init_zones(void) |
| { |
| xfs_ioend_bioset = bioset_create(4 * MAX_BUF_PER_PAGE, |
| offsetof(struct xfs_ioend, io_inline_bio)); |
| if (!xfs_ioend_bioset) |
| goto out; |
| |
| xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), |
| "xfs_log_ticket"); |
| if (!xfs_log_ticket_zone) |
| goto out_free_ioend_bioset; |
| |
| xfs_bmap_free_item_zone = kmem_zone_init( |
| sizeof(struct xfs_extent_free_item), |
| "xfs_bmap_free_item"); |
| if (!xfs_bmap_free_item_zone) |
| goto out_destroy_log_ticket_zone; |
| |
| xfs_btree_cur_zone = kmem_zone_init(sizeof(xfs_btree_cur_t), |
| "xfs_btree_cur"); |
| if (!xfs_btree_cur_zone) |
| goto out_destroy_bmap_free_item_zone; |
| |
| xfs_da_state_zone = kmem_zone_init(sizeof(xfs_da_state_t), |
| "xfs_da_state"); |
| if (!xfs_da_state_zone) |
| goto out_destroy_btree_cur_zone; |
| |
| xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); |
| if (!xfs_ifork_zone) |
| goto out_destroy_da_state_zone; |
| |
| xfs_trans_zone = kmem_zone_init(sizeof(xfs_trans_t), "xfs_trans"); |
| if (!xfs_trans_zone) |
| goto out_destroy_ifork_zone; |
| |
| xfs_log_item_desc_zone = |
| kmem_zone_init(sizeof(struct xfs_log_item_desc), |
| "xfs_log_item_desc"); |
| if (!xfs_log_item_desc_zone) |
| goto out_destroy_trans_zone; |
| |
| /* |
| * The size of the zone allocated buf log item is the maximum |
| * size possible under XFS. This wastes a little bit of memory, |
| * but it is much faster. |
| */ |
| xfs_buf_item_zone = kmem_zone_init(sizeof(struct xfs_buf_log_item), |
| "xfs_buf_item"); |
| if (!xfs_buf_item_zone) |
| goto out_destroy_log_item_desc_zone; |
| |
| xfs_efd_zone = kmem_zone_init((sizeof(xfs_efd_log_item_t) + |
| ((XFS_EFD_MAX_FAST_EXTENTS - 1) * |
| sizeof(xfs_extent_t))), "xfs_efd_item"); |
| if (!xfs_efd_zone) |
| goto out_destroy_buf_item_zone; |
| |
| xfs_efi_zone = kmem_zone_init((sizeof(xfs_efi_log_item_t) + |
| ((XFS_EFI_MAX_FAST_EXTENTS - 1) * |
| sizeof(xfs_extent_t))), "xfs_efi_item"); |
| if (!xfs_efi_zone) |
| goto out_destroy_efd_zone; |
| |
| xfs_inode_zone = |
| kmem_zone_init_flags(sizeof(xfs_inode_t), "xfs_inode", |
| KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | KM_ZONE_SPREAD | |
| KM_ZONE_ACCOUNT, xfs_fs_inode_init_once); |
| if (!xfs_inode_zone) |
| goto out_destroy_efi_zone; |
| |
| xfs_ili_zone = |
| kmem_zone_init_flags(sizeof(xfs_inode_log_item_t), "xfs_ili", |
| KM_ZONE_SPREAD, NULL); |
| if (!xfs_ili_zone) |
| goto out_destroy_inode_zone; |
| xfs_icreate_zone = kmem_zone_init(sizeof(struct xfs_icreate_item), |
| "xfs_icr"); |
| if (!xfs_icreate_zone) |
| goto out_destroy_ili_zone; |
| |
| xfs_rud_zone = kmem_zone_init(sizeof(struct xfs_rud_log_item), |
| "xfs_rud_item"); |
| if (!xfs_rud_zone) |
| goto out_destroy_icreate_zone; |
| |
| xfs_rui_zone = kmem_zone_init( |
| xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS), |
| "xfs_rui_item"); |
| if (!xfs_rui_zone) |
| goto out_destroy_rud_zone; |
| |
| xfs_cud_zone = kmem_zone_init(sizeof(struct xfs_cud_log_item), |
| "xfs_cud_item"); |
| if (!xfs_cud_zone) |
| goto out_destroy_rui_zone; |
| |
| xfs_cui_zone = kmem_zone_init( |
| xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS), |
| "xfs_cui_item"); |
| if (!xfs_cui_zone) |
| goto out_destroy_cud_zone; |
| |
| xfs_bud_zone = kmem_zone_init(sizeof(struct xfs_bud_log_item), |
| "xfs_bud_item"); |
| if (!xfs_bud_zone) |
| goto out_destroy_cui_zone; |
| |
| xfs_bui_zone = kmem_zone_init( |
| xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS), |
| "xfs_bui_item"); |
| if (!xfs_bui_zone) |
| goto out_destroy_bud_zone; |
| |
| return 0; |
| |
| out_destroy_bud_zone: |
| kmem_zone_destroy(xfs_bud_zone); |
| out_destroy_cui_zone: |
| kmem_zone_destroy(xfs_cui_zone); |
| out_destroy_cud_zone: |
| kmem_zone_destroy(xfs_cud_zone); |
| out_destroy_rui_zone: |
| kmem_zone_destroy(xfs_rui_zone); |
| out_destroy_rud_zone: |
| kmem_zone_destroy(xfs_rud_zone); |
| out_destroy_icreate_zone: |
| kmem_zone_destroy(xfs_icreate_zone); |
| out_destroy_ili_zone: |
| kmem_zone_destroy(xfs_ili_zone); |
| out_destroy_inode_zone: |
| kmem_zone_destroy(xfs_inode_zone); |
| out_destroy_efi_zone: |
| kmem_zone_destroy(xfs_efi_zone); |
| out_destroy_efd_zone: |
| kmem_zone_destroy(xfs_efd_zone); |
| out_destroy_buf_item_zone: |
| kmem_zone_destroy(xfs_buf_item_zone); |
| out_destroy_log_item_desc_zone: |
| kmem_zone_destroy(xfs_log_item_desc_zone); |
| out_destroy_trans_zone: |
| kmem_zone_destroy(xfs_trans_zone); |
| out_destroy_ifork_zone: |
| kmem_zone_destroy(xfs_ifork_zone); |
| out_destroy_da_state_zone: |
| kmem_zone_destroy(xfs_da_state_zone); |
| out_destroy_btree_cur_zone: |
| kmem_zone_destroy(xfs_btree_cur_zone); |
| out_destroy_bmap_free_item_zone: |
| kmem_zone_destroy(xfs_bmap_free_item_zone); |
| out_destroy_log_ticket_zone: |
| kmem_zone_destroy(xfs_log_ticket_zone); |
| out_free_ioend_bioset: |
| bioset_free(xfs_ioend_bioset); |
| out: |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_zones(void) |
| { |
| /* |
| * Make sure all delayed rcu free are flushed before we |
| * destroy caches. |
| */ |
| rcu_barrier(); |
| kmem_zone_destroy(xfs_bui_zone); |
| kmem_zone_destroy(xfs_bud_zone); |
| kmem_zone_destroy(xfs_cui_zone); |
| kmem_zone_destroy(xfs_cud_zone); |
| kmem_zone_destroy(xfs_rui_zone); |
| kmem_zone_destroy(xfs_rud_zone); |
| kmem_zone_destroy(xfs_icreate_zone); |
| kmem_zone_destroy(xfs_ili_zone); |
| kmem_zone_destroy(xfs_inode_zone); |
| kmem_zone_destroy(xfs_efi_zone); |
| kmem_zone_destroy(xfs_efd_zone); |
| kmem_zone_destroy(xfs_buf_item_zone); |
| kmem_zone_destroy(xfs_log_item_desc_zone); |
| kmem_zone_destroy(xfs_trans_zone); |
| kmem_zone_destroy(xfs_ifork_zone); |
| kmem_zone_destroy(xfs_da_state_zone); |
| kmem_zone_destroy(xfs_btree_cur_zone); |
| kmem_zone_destroy(xfs_bmap_free_item_zone); |
| kmem_zone_destroy(xfs_log_ticket_zone); |
| bioset_free(xfs_ioend_bioset); |
| } |
| |
| STATIC int __init |
| xfs_init_workqueues(void) |
| { |
| /* |
| * The allocation workqueue can be used in memory reclaim situations |
| * (writepage path), and parallelism is only limited by the number of |
| * AGs in all the filesystems mounted. Hence use the default large |
| * max_active value for this workqueue. |
| */ |
| xfs_alloc_wq = alloc_workqueue("xfsalloc", |
| WQ_MEM_RECLAIM|WQ_FREEZABLE, 0); |
| if (!xfs_alloc_wq) |
| return -ENOMEM; |
| |
| xfs_discard_wq = alloc_workqueue("xfsdiscard", WQ_UNBOUND, 0); |
| if (!xfs_discard_wq) |
| goto out_free_alloc_wq; |
| |
| return 0; |
| out_free_alloc_wq: |
| destroy_workqueue(xfs_alloc_wq); |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_workqueues(void) |
| { |
| destroy_workqueue(xfs_discard_wq); |
| destroy_workqueue(xfs_alloc_wq); |
| } |
| |
| STATIC int __init |
| init_xfs_fs(void) |
| { |
| int error; |
| |
| xfs_check_ondisk_structs(); |
| |
| printk(KERN_INFO XFS_VERSION_STRING " with " |
| XFS_BUILD_OPTIONS " enabled\n"); |
| |
| xfs_extent_free_init_defer_op(); |
| xfs_rmap_update_init_defer_op(); |
| xfs_refcount_update_init_defer_op(); |
| xfs_bmap_update_init_defer_op(); |
| |
| xfs_dir_startup(); |
| |
| error = xfs_init_zones(); |
| if (error) |
| goto out; |
| |
| error = xfs_init_workqueues(); |
| if (error) |
| goto out_destroy_zones; |
| |
| error = xfs_mru_cache_init(); |
| if (error) |
| goto out_destroy_wq; |
| |
| error = xfs_buf_init(); |
| if (error) |
| goto out_mru_cache_uninit; |
| |
| error = xfs_init_procfs(); |
| if (error) |
| goto out_buf_terminate; |
| |
| error = xfs_sysctl_register(); |
| if (error) |
| goto out_cleanup_procfs; |
| |
| xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); |
| if (!xfs_kset) { |
| error = -ENOMEM; |
| goto out_sysctl_unregister; |
| } |
| |
| xfsstats.xs_kobj.kobject.kset = xfs_kset; |
| |
| xfsstats.xs_stats = alloc_percpu(struct xfsstats); |
| if (!xfsstats.xs_stats) { |
| error = -ENOMEM; |
| goto out_kset_unregister; |
| } |
| |
| error = xfs_sysfs_init(&xfsstats.xs_kobj, &xfs_stats_ktype, NULL, |
| "stats"); |
| if (error) |
| goto out_free_stats; |
| |
| #ifdef DEBUG |
| xfs_dbg_kobj.kobject.kset = xfs_kset; |
| error = xfs_sysfs_init(&xfs_dbg_kobj, &xfs_dbg_ktype, NULL, "debug"); |
| if (error) |
| goto out_remove_stats_kobj; |
| #endif |
| |
| error = xfs_qm_init(); |
| if (error) |
| goto out_remove_dbg_kobj; |
| |
| error = register_filesystem(&xfs_fs_type); |
| if (error) |
| goto out_qm_exit; |
| return 0; |
| |
| out_qm_exit: |
| xfs_qm_exit(); |
| out_remove_dbg_kobj: |
| #ifdef DEBUG |
| xfs_sysfs_del(&xfs_dbg_kobj); |
| out_remove_stats_kobj: |
| #endif |
| xfs_sysfs_del(&xfsstats.xs_kobj); |
| out_free_stats: |
| free_percpu(xfsstats.xs_stats); |
| out_kset_unregister: |
| kset_unregister(xfs_kset); |
| out_sysctl_unregister: |
| xfs_sysctl_unregister(); |
| out_cleanup_procfs: |
| xfs_cleanup_procfs(); |
| out_buf_terminate: |
| xfs_buf_terminate(); |
| out_mru_cache_uninit: |
| xfs_mru_cache_uninit(); |
| out_destroy_wq: |
| xfs_destroy_workqueues(); |
| out_destroy_zones: |
| xfs_destroy_zones(); |
| out: |
| return error; |
| } |
| |
| STATIC void __exit |
| exit_xfs_fs(void) |
| { |
| xfs_qm_exit(); |
| unregister_filesystem(&xfs_fs_type); |
| #ifdef DEBUG |
| xfs_sysfs_del(&xfs_dbg_kobj); |
| #endif |
| xfs_sysfs_del(&xfsstats.xs_kobj); |
| free_percpu(xfsstats.xs_stats); |
| kset_unregister(xfs_kset); |
| xfs_sysctl_unregister(); |
| xfs_cleanup_procfs(); |
| xfs_buf_terminate(); |
| xfs_mru_cache_uninit(); |
| xfs_destroy_workqueues(); |
| xfs_destroy_zones(); |
| xfs_uuid_table_free(); |
| } |
| |
| module_init(init_xfs_fs); |
| module_exit(exit_xfs_fs); |
| |
| MODULE_AUTHOR("Silicon Graphics, Inc."); |
| MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); |
| MODULE_LICENSE("GPL"); |