| /* |
| * 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_bit.h" |
| #include "xfs_log.h" |
| #include "xfs_inum.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_dir2.h" |
| #include "xfs_alloc.h" |
| #include "xfs_quota.h" |
| #include "xfs_mount.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_btree.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_bmap.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_error.h" |
| #include "xfs_itable.h" |
| #include "xfs_fsops.h" |
| #include "xfs_attr.h" |
| #include "xfs_buf_item.h" |
| #include "xfs_utils.h" |
| #include "xfs_vnodeops.h" |
| #include "xfs_log_priv.h" |
| #include "xfs_trans_priv.h" |
| #include "xfs_filestream.h" |
| #include "xfs_da_btree.h" |
| #include "xfs_extfree_item.h" |
| #include "xfs_mru_cache.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_sync.h" |
| #include "xfs_trace.h" |
| |
| #include <linux/namei.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; |
| static kmem_zone_t *xfs_ioend_zone; |
| mempool_t *xfs_ioend_pool; |
| |
| #define MNTOPT_LOGBUFS "logbufs" /* number of XFS log buffers */ |
| #define MNTOPT_LOGBSIZE "logbsize" /* size of XFS log buffers */ |
| #define MNTOPT_LOGDEV "logdev" /* log device */ |
| #define MNTOPT_RTDEV "rtdev" /* realtime I/O device */ |
| #define MNTOPT_BIOSIZE "biosize" /* log2 of preferred buffered io size */ |
| #define MNTOPT_WSYNC "wsync" /* safe-mode nfs compatible mount */ |
| #define MNTOPT_NOALIGN "noalign" /* turn off stripe alignment */ |
| #define MNTOPT_SWALLOC "swalloc" /* turn on stripe width allocation */ |
| #define MNTOPT_SUNIT "sunit" /* data volume stripe unit */ |
| #define MNTOPT_SWIDTH "swidth" /* data volume stripe width */ |
| #define MNTOPT_NOUUID "nouuid" /* ignore filesystem UUID */ |
| #define MNTOPT_MTPT "mtpt" /* filesystem mount point */ |
| #define MNTOPT_GRPID "grpid" /* group-ID from parent directory */ |
| #define MNTOPT_NOGRPID "nogrpid" /* group-ID from current process */ |
| #define MNTOPT_BSDGROUPS "bsdgroups" /* group-ID from parent directory */ |
| #define MNTOPT_SYSVGROUPS "sysvgroups" /* group-ID from current process */ |
| #define MNTOPT_ALLOCSIZE "allocsize" /* preferred allocation size */ |
| #define MNTOPT_NORECOVERY "norecovery" /* don't run XFS recovery */ |
| #define MNTOPT_BARRIER "barrier" /* use writer barriers for log write and |
| * unwritten extent conversion */ |
| #define MNTOPT_NOBARRIER "nobarrier" /* .. disable */ |
| #define MNTOPT_64BITINODE "inode64" /* inodes can be allocated anywhere */ |
| #define MNTOPT_IKEEP "ikeep" /* do not free empty inode clusters */ |
| #define MNTOPT_NOIKEEP "noikeep" /* free empty inode clusters */ |
| #define MNTOPT_LARGEIO "largeio" /* report large I/O sizes in stat() */ |
| #define MNTOPT_NOLARGEIO "nolargeio" /* do not report large I/O sizes |
| * in stat(). */ |
| #define MNTOPT_ATTR2 "attr2" /* do use attr2 attribute format */ |
| #define MNTOPT_NOATTR2 "noattr2" /* do not use attr2 attribute format */ |
| #define MNTOPT_FILESTREAM "filestreams" /* use filestreams allocator */ |
| #define MNTOPT_QUOTA "quota" /* disk quotas (user) */ |
| #define MNTOPT_NOQUOTA "noquota" /* no quotas */ |
| #define MNTOPT_USRQUOTA "usrquota" /* user quota enabled */ |
| #define MNTOPT_GRPQUOTA "grpquota" /* group quota enabled */ |
| #define MNTOPT_PRJQUOTA "prjquota" /* project quota enabled */ |
| #define MNTOPT_UQUOTA "uquota" /* user quota (IRIX variant) */ |
| #define MNTOPT_GQUOTA "gquota" /* group quota (IRIX variant) */ |
| #define MNTOPT_PQUOTA "pquota" /* project quota (IRIX variant) */ |
| #define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */ |
| #define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */ |
| #define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */ |
| #define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */ |
| #define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */ |
| #define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */ |
| #define MNTOPT_DISCARD "discard" /* Discard unused blocks */ |
| #define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */ |
| |
| /* |
| * Table driven mount option parser. |
| * |
| * Currently only used for remount, but it will be used for mount |
| * in the future, too. |
| */ |
| enum { |
| Opt_barrier, Opt_nobarrier, Opt_err |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_barrier, "barrier"}, |
| {Opt_nobarrier, "nobarrier"}, |
| {Opt_err, NULL} |
| }; |
| |
| |
| STATIC unsigned long |
| suffix_strtoul(char *s, char **endp, unsigned int base) |
| { |
| int last, shift_left_factor = 0; |
| char *value = s; |
| |
| 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'; |
| } |
| |
| return simple_strtoul((const char *)s, endp, base) << shift_left_factor; |
| } |
| |
| /* |
| * 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. |
| */ |
| STATIC int |
| xfs_parseargs( |
| struct xfs_mount *mp, |
| char *options) |
| { |
| struct super_block *sb = mp->m_super; |
| char *this_char, *value, *eov; |
| 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; |
| mp->m_flags |= XFS_MOUNT_SMALL_INUMS; |
| |
| /* |
| * These can be overridden by the mount option parsing. |
| */ |
| mp->m_logbufs = -1; |
| mp->m_logbsize = -1; |
| |
| if (!options) |
| goto done; |
| |
| while ((this_char = strsep(&options, ",")) != NULL) { |
| if (!*this_char) |
| continue; |
| if ((value = strchr(this_char, '=')) != NULL) |
| *value++ = 0; |
| |
| if (!strcmp(this_char, MNTOPT_LOGBUFS)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| mp->m_logbufs = simple_strtoul(value, &eov, 10); |
| } else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| mp->m_logbsize = suffix_strtoul(value, &eov, 10); |
| } else if (!strcmp(this_char, MNTOPT_LOGDEV)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| mp->m_logname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); |
| if (!mp->m_logname) |
| return ENOMEM; |
| } else if (!strcmp(this_char, MNTOPT_MTPT)) { |
| xfs_warn(mp, "%s option not allowed on this system", |
| this_char); |
| return EINVAL; |
| } else if (!strcmp(this_char, MNTOPT_RTDEV)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| mp->m_rtname = kstrndup(value, MAXNAMELEN, GFP_KERNEL); |
| if (!mp->m_rtname) |
| return ENOMEM; |
| } else if (!strcmp(this_char, MNTOPT_BIOSIZE)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| iosize = simple_strtoul(value, &eov, 10); |
| iosizelog = ffs(iosize) - 1; |
| } else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| iosize = suffix_strtoul(value, &eov, 10); |
| iosizelog = ffs(iosize) - 1; |
| } else if (!strcmp(this_char, MNTOPT_GRPID) || |
| !strcmp(this_char, MNTOPT_BSDGROUPS)) { |
| mp->m_flags |= XFS_MOUNT_GRPID; |
| } else if (!strcmp(this_char, MNTOPT_NOGRPID) || |
| !strcmp(this_char, MNTOPT_SYSVGROUPS)) { |
| mp->m_flags &= ~XFS_MOUNT_GRPID; |
| } else if (!strcmp(this_char, MNTOPT_WSYNC)) { |
| mp->m_flags |= XFS_MOUNT_WSYNC; |
| } else if (!strcmp(this_char, MNTOPT_NORECOVERY)) { |
| mp->m_flags |= XFS_MOUNT_NORECOVERY; |
| } else if (!strcmp(this_char, MNTOPT_NOALIGN)) { |
| mp->m_flags |= XFS_MOUNT_NOALIGN; |
| } else if (!strcmp(this_char, MNTOPT_SWALLOC)) { |
| mp->m_flags |= XFS_MOUNT_SWALLOC; |
| } else if (!strcmp(this_char, MNTOPT_SUNIT)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| dsunit = simple_strtoul(value, &eov, 10); |
| } else if (!strcmp(this_char, MNTOPT_SWIDTH)) { |
| if (!value || !*value) { |
| xfs_warn(mp, "%s option requires an argument", |
| this_char); |
| return EINVAL; |
| } |
| dswidth = simple_strtoul(value, &eov, 10); |
| } else if (!strcmp(this_char, MNTOPT_64BITINODE)) { |
| mp->m_flags &= ~XFS_MOUNT_SMALL_INUMS; |
| #if !XFS_BIG_INUMS |
| xfs_warn(mp, "%s option not allowed on this system", |
| this_char); |
| return EINVAL; |
| #endif |
| } else if (!strcmp(this_char, MNTOPT_NOUUID)) { |
| mp->m_flags |= XFS_MOUNT_NOUUID; |
| } else if (!strcmp(this_char, MNTOPT_BARRIER)) { |
| mp->m_flags |= XFS_MOUNT_BARRIER; |
| } else if (!strcmp(this_char, MNTOPT_NOBARRIER)) { |
| mp->m_flags &= ~XFS_MOUNT_BARRIER; |
| } else if (!strcmp(this_char, MNTOPT_IKEEP)) { |
| mp->m_flags |= XFS_MOUNT_IKEEP; |
| } else if (!strcmp(this_char, MNTOPT_NOIKEEP)) { |
| mp->m_flags &= ~XFS_MOUNT_IKEEP; |
| } else if (!strcmp(this_char, MNTOPT_LARGEIO)) { |
| mp->m_flags &= ~XFS_MOUNT_COMPAT_IOSIZE; |
| } else if (!strcmp(this_char, MNTOPT_NOLARGEIO)) { |
| mp->m_flags |= XFS_MOUNT_COMPAT_IOSIZE; |
| } else if (!strcmp(this_char, MNTOPT_ATTR2)) { |
| mp->m_flags |= XFS_MOUNT_ATTR2; |
| } else if (!strcmp(this_char, MNTOPT_NOATTR2)) { |
| mp->m_flags &= ~XFS_MOUNT_ATTR2; |
| mp->m_flags |= XFS_MOUNT_NOATTR2; |
| } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) { |
| mp->m_flags |= XFS_MOUNT_FILESTREAMS; |
| } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) { |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; |
| mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE; |
| } else if (!strcmp(this_char, MNTOPT_QUOTA) || |
| !strcmp(this_char, MNTOPT_UQUOTA) || |
| !strcmp(this_char, MNTOPT_USRQUOTA)) { |
| mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE | |
| XFS_UQUOTA_ENFD); |
| } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) || |
| !strcmp(this_char, MNTOPT_UQUOTANOENF)) { |
| mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_UQUOTA_ENFD; |
| } else if (!strcmp(this_char, MNTOPT_PQUOTA) || |
| !strcmp(this_char, MNTOPT_PRJQUOTA)) { |
| mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE | |
| XFS_OQUOTA_ENFD); |
| } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) { |
| mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_OQUOTA_ENFD; |
| } else if (!strcmp(this_char, MNTOPT_GQUOTA) || |
| !strcmp(this_char, MNTOPT_GRPQUOTA)) { |
| mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE | |
| XFS_OQUOTA_ENFD); |
| } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) { |
| mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE); |
| mp->m_qflags &= ~XFS_OQUOTA_ENFD; |
| } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) { |
| xfs_warn(mp, |
| "delaylog is the default now, option is deprecated."); |
| } else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) { |
| xfs_warn(mp, |
| "nodelaylog support has been removed, option is deprecated."); |
| } else if (!strcmp(this_char, MNTOPT_DISCARD)) { |
| mp->m_flags |= XFS_MOUNT_DISCARD; |
| } else if (!strcmp(this_char, MNTOPT_NODISCARD)) { |
| mp->m_flags &= ~XFS_MOUNT_DISCARD; |
| } else if (!strcmp(this_char, "ihashsize")) { |
| xfs_warn(mp, |
| "ihashsize no longer used, option is deprecated."); |
| } else if (!strcmp(this_char, "osyncisdsync")) { |
| xfs_warn(mp, |
| "osyncisdsync has no effect, option is deprecated."); |
| } else if (!strcmp(this_char, "osyncisosync")) { |
| xfs_warn(mp, |
| "osyncisosync has no effect, option is deprecated."); |
| } else if (!strcmp(this_char, "irixsgid")) { |
| xfs_warn(mp, |
| "irixsgid is now a sysctl(2) variable, option is deprecated."); |
| } else { |
| xfs_warn(mp, "unknown mount option [%s].", this_char); |
| 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 ((mp->m_qflags & (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE)) && |
| (mp->m_qflags & (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE))) { |
| xfs_warn(mp, "cannot mount with both project and group quota"); |
| return EINVAL; |
| } |
| |
| 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 (!(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. |
| */ |
| if (dsunit) { |
| mp->m_dalign = dsunit; |
| mp->m_flags |= XFS_MOUNT_RETERR; |
| } |
| |
| if (dswidth) |
| 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 XFS_ERROR(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 XFS_ERROR(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 XFS_ERROR(EINVAL); |
| } |
| |
| mp->m_flags |= XFS_MOUNT_DFLT_IOSIZE; |
| mp->m_readio_log = iosizelog; |
| mp->m_writeio_log = iosizelog; |
| } |
| |
| return 0; |
| } |
| |
| struct proc_xfs_info { |
| int 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, "," MNTOPT_IKEEP }, |
| { XFS_MOUNT_WSYNC, "," MNTOPT_WSYNC }, |
| { XFS_MOUNT_NOALIGN, "," MNTOPT_NOALIGN }, |
| { XFS_MOUNT_SWALLOC, "," MNTOPT_SWALLOC }, |
| { XFS_MOUNT_NOUUID, "," MNTOPT_NOUUID }, |
| { XFS_MOUNT_NORECOVERY, "," MNTOPT_NORECOVERY }, |
| { XFS_MOUNT_ATTR2, "," MNTOPT_ATTR2 }, |
| { XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM }, |
| { XFS_MOUNT_GRPID, "," MNTOPT_GRPID }, |
| { XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD }, |
| { 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, "," MNTOPT_LARGEIO }, |
| { XFS_MOUNT_BARRIER, "," MNTOPT_NOBARRIER }, |
| { XFS_MOUNT_SMALL_INUMS, "," MNTOPT_64BITINODE }, |
| { 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, "," MNTOPT_ALLOCSIZE "=%dk", |
| (int)(1 << mp->m_writeio_log) >> 10); |
| |
| if (mp->m_logbufs > 0) |
| seq_printf(m, "," MNTOPT_LOGBUFS "=%d", mp->m_logbufs); |
| if (mp->m_logbsize > 0) |
| seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10); |
| |
| if (mp->m_logname) |
| seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname); |
| if (mp->m_rtname) |
| seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname); |
| |
| if (mp->m_dalign > 0) |
| seq_printf(m, "," MNTOPT_SUNIT "=%d", |
| (int)XFS_FSB_TO_BB(mp, mp->m_dalign)); |
| if (mp->m_swidth > 0) |
| seq_printf(m, "," MNTOPT_SWIDTH "=%d", |
| (int)XFS_FSB_TO_BB(mp, mp->m_swidth)); |
| |
| if (mp->m_qflags & (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD)) |
| seq_puts(m, "," MNTOPT_USRQUOTA); |
| else if (mp->m_qflags & XFS_UQUOTA_ACCT) |
| seq_puts(m, "," MNTOPT_UQUOTANOENF); |
| |
| /* Either project or group quotas can be active, not both */ |
| |
| if (mp->m_qflags & XFS_PQUOTA_ACCT) { |
| if (mp->m_qflags & XFS_OQUOTA_ENFD) |
| seq_puts(m, "," MNTOPT_PRJQUOTA); |
| else |
| seq_puts(m, "," MNTOPT_PQUOTANOENF); |
| } else if (mp->m_qflags & XFS_GQUOTA_ACCT) { |
| if (mp->m_qflags & XFS_OQUOTA_ENFD) |
| seq_puts(m, "," MNTOPT_GRPQUOTA); |
| else |
| seq_puts(m, "," MNTOPT_GQUOTANOENF); |
| } |
| |
| if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) |
| seq_puts(m, "," MNTOPT_NOQUOTA); |
| |
| return 0; |
| } |
| __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_CACHE_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_CACHE_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_CACHE_SIZE; |
| bitshift = BITS_PER_LONG; |
| # else |
| pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); |
| # endif |
| #endif |
| |
| return (((__uint64_t)pagefactor) << bitshift) - 1; |
| } |
| |
| 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\n", 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, 0, mp->m_fsname); |
| if (!mp->m_ddev_targp) |
| goto out_close_rtdev; |
| |
| if (rtdev) { |
| mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev, 1, |
| mp->m_fsname); |
| if (!mp->m_rtdev_targp) |
| goto out_free_ddev_targ; |
| } |
| |
| if (logdev && logdev != ddev) { |
| mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev, 1, |
| mp->m_fsname); |
| 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: |
| if (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_blocksize, |
| 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, |
| mp->m_sb.sb_blocksize, |
| log_sector_size); |
| if (error) |
| return error; |
| } |
| if (mp->m_rtdev_targp) { |
| error = xfs_setsize_buftarg(mp->m_rtdev_targp, |
| mp->m_sb.sb_blocksize, |
| mp->m_sb.sb_sectsize); |
| if (error) |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_init_mount_workqueues( |
| struct xfs_mount *mp) |
| { |
| mp->m_data_workqueue = alloc_workqueue("xfs-data/%s", |
| WQ_MEM_RECLAIM, 0, mp->m_fsname); |
| if (!mp->m_data_workqueue) |
| goto out; |
| |
| mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", |
| WQ_MEM_RECLAIM, 0, mp->m_fsname); |
| if (!mp->m_unwritten_workqueue) |
| goto out_destroy_data_iodone_queue; |
| |
| return 0; |
| |
| out_destroy_data_iodone_queue: |
| destroy_workqueue(mp->m_data_workqueue); |
| out: |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_mount_workqueues( |
| struct xfs_mount *mp) |
| { |
| destroy_workqueue(mp->m_data_workqueue); |
| destroy_workqueue(mp->m_unwritten_workqueue); |
| } |
| |
| /* 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 reclaim the inode. |
| */ |
| STATIC void |
| xfs_fs_destroy_inode( |
| struct inode *inode) |
| { |
| struct xfs_inode *ip = XFS_I(inode); |
| |
| trace_xfs_destroy_inode(ip); |
| |
| XFS_STATS_INC(vn_reclaim); |
| |
| /* bad inode, get out here ASAP */ |
| if (is_bad_inode(inode)) |
| goto out_reclaim; |
| |
| ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
| |
| /* |
| * 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. |
| */ |
| out_reclaim: |
| 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_lock, MRLOCK_ALLOW_EQUAL_PRI|MRLOCK_BARRIER, |
| "xfsino", ip->i_ino); |
| } |
| |
| /* |
| * This is called by the VFS when dirtying inode metadata. This can happen |
| * for a few reasons, but we only care about timestamp updates, given that |
| * we handled the rest ourselves. In theory no other calls should happen, |
| * but for example generic_write_end() keeps dirtying the inode after |
| * updating i_size. Thus we check that the flags are exactly I_DIRTY_SYNC, |
| * and skip this call otherwise. |
| * |
| * We'll hopefull get a different method just for updating timestamps soon, |
| * at which point this hack can go away, and maybe we'll also get real |
| * error handling here. |
| */ |
| STATIC void |
| xfs_fs_dirty_inode( |
| struct inode *inode, |
| int flags) |
| { |
| struct xfs_inode *ip = XFS_I(inode); |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_trans *tp; |
| int error; |
| |
| if (flags != I_DIRTY_SYNC) |
| return; |
| |
| trace_xfs_dirty_inode(ip); |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); |
| error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0); |
| if (error) { |
| xfs_trans_cancel(tp, 0); |
| goto trouble; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| /* |
| * Grab all the latest timestamps from the Linux inode. |
| */ |
| ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec; |
| ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec; |
| ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec; |
| ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec; |
| ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec; |
| ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec; |
| |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); |
| error = xfs_trans_commit(tp, 0); |
| if (error) |
| goto trouble; |
| return; |
| |
| trouble: |
| xfs_warn(mp, "failed to update timestamps for inode 0x%llx", ip->i_ino); |
| } |
| |
| STATIC void |
| xfs_fs_evict_inode( |
| struct inode *inode) |
| { |
| xfs_inode_t *ip = XFS_I(inode); |
| |
| trace_xfs_evict_inode(ip); |
| |
| truncate_inode_pages(&inode->i_data, 0); |
| end_writeback(inode); |
| XFS_STATS_INC(vn_rele); |
| XFS_STATS_INC(vn_remove); |
| XFS_STATS_DEC(vn_active); |
| |
| /* |
| * The iolock is used by the file system to coordinate reads, |
| * writes, and block truncates. Up to this point the lock |
| * protected concurrent accesses by users of the inode. But |
| * from here forward we're doing some final processing of the |
| * inode because we're done with it, and although we reuse the |
| * iolock for protection it is really a distinct lock class |
| * (in the lockdep sense) from before. To keep lockdep happy |
| * (and basically indicate what we are doing), we explicitly |
| * re-init the iolock here. |
| */ |
| ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); |
| mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); |
| lockdep_set_class_and_name(&ip->i_iolock.mr_lock, |
| &xfs_iolock_reclaimable, "xfs_iolock_reclaimable"); |
| |
| xfs_inactive(ip); |
| } |
| |
| /* |
| * 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); |
| |
| 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 void |
| xfs_fs_put_super( |
| struct super_block *sb) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| /* |
| * Blow away any referenced inode in the filestreams cache. |
| * This can and will cause log traffic as inodes go inactive |
| * here. |
| */ |
| xfs_filestream_unmount(mp); |
| |
| xfs_flush_buftarg(mp->m_ddev_targp, 1); |
| |
| xfs_unmountfs(mp); |
| xfs_syncd_stop(mp); |
| xfs_freesb(mp); |
| xfs_icsb_destroy_counters(mp); |
| xfs_destroy_mount_workqueues(mp); |
| xfs_close_devices(mp); |
| xfs_free_fsname(mp); |
| kfree(mp); |
| } |
| |
| STATIC int |
| xfs_fs_sync_fs( |
| struct super_block *sb, |
| int wait) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| int error; |
| |
| /* |
| * Doing anything during the async pass would be counterproductive. |
| */ |
| if (!wait) |
| return 0; |
| |
| error = xfs_quiesce_data(mp); |
| if (error) |
| return -error; |
| |
| if (laptop_mode) { |
| /* |
| * The disk must be active because we're syncing. |
| * We schedule xfssyncd now (now that the disk is |
| * active) instead of later (when it might not be). |
| */ |
| flush_delayed_work_sync(&mp->m_sync_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(dentry->d_inode); |
| __uint64_t fakeinos, id; |
| 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); |
| |
| xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); |
| |
| 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; |
| statp->f_bfree = statp->f_bavail = |
| sbp->sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); |
| fakeinos = statp->f_bfree << sbp->sb_inopblog; |
| statp->f_files = |
| MIN(sbp->sb_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); |
| |
| /* make sure statp->f_ffree does not underflow */ |
| ffree = statp->f_files - (sbp->sb_icount - sbp->sb_ifree); |
| statp->f_ffree = max_t(__int64_t, ffree, 0); |
| |
| spin_unlock(&mp->m_sb_lock); |
| |
| if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
| ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) == |
| (XFS_PQUOTA_ACCT|XFS_OQUOTA_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); |
| } |
| |
| STATIC int |
| xfs_fs_remount( |
| struct super_block *sb, |
| int *flags, |
| char *options) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| substring_t args[MAX_OPT_ARGS]; |
| char *p; |
| int error; |
| |
| while ((p = strsep(&options, ",")) != NULL) { |
| int token; |
| |
| if (!*p) |
| continue; |
| |
| token = match_token(p, tokens, args); |
| switch (token) { |
| case Opt_barrier: |
| mp->m_flags |= XFS_MOUNT_BARRIER; |
| break; |
| case Opt_nobarrier: |
| mp->m_flags &= ~XFS_MOUNT_BARRIER; |
| 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\n", p); |
| return -EINVAL; |
| #else |
| break; |
| #endif |
| } |
| } |
| |
| /* ro -> rw */ |
| if ((mp->m_flags & XFS_MOUNT_RDONLY) && !(*flags & MS_RDONLY)) { |
| 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_flags) { |
| error = xfs_mount_log_sb(mp, mp->m_update_flags); |
| if (error) { |
| xfs_warn(mp, "failed to write sb changes"); |
| return error; |
| } |
| mp->m_update_flags = 0; |
| } |
| |
| /* |
| * 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); |
| } |
| |
| /* rw -> ro */ |
| if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & MS_RDONLY)) { |
| /* |
| * After we have synced the data but 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_quiesce_data(mp); |
| xfs_save_resvblks(mp); |
| 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 write a dummy |
| * record to dirty the log in case of a crash while frozen. |
| */ |
| 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_fs_log_dummy(mp); |
| } |
| |
| STATIC int |
| xfs_fs_unfreeze( |
| struct super_block *sb) |
| { |
| struct xfs_mount *mp = XFS_M(sb); |
| |
| xfs_restore_resvblks(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 XFS_ERROR(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 XFS_ERROR(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 XFS_ERROR(EROFS); |
| } |
| |
| return 0; |
| } |
| |
| 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); |
| |
| 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; |
| #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_icsb_init_counters(mp); |
| if (error) |
| goto out_destroy_workqueues; |
| |
| error = xfs_readsb(mp, flags); |
| if (error) |
| goto out_destroy_counters; |
| |
| 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. |
| * For the same reason we must also initialise the syncd and register |
| * the inode cache shrinker so that inodes can be reclaimed during |
| * operations like a quotacheck that iterate all inodes in the |
| * filesystem. |
| */ |
| 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); |
| |
| error = xfs_syncd_init(mp); |
| if (error) |
| goto out_filestream_unmount; |
| |
| error = xfs_mountfs(mp); |
| if (error) |
| goto out_syncd_stop; |
| |
| root = igrab(VFS_I(mp->m_rootip)); |
| if (!root) { |
| error = ENOENT; |
| goto out_unmount; |
| } |
| if (is_bad_inode(root)) { |
| error = EINVAL; |
| goto out_unmount; |
| } |
| sb->s_root = d_make_root(root); |
| if (!sb->s_root) { |
| error = ENOMEM; |
| goto out_unmount; |
| } |
| |
| return 0; |
| out_syncd_stop: |
| xfs_syncd_stop(mp); |
| out_filestream_unmount: |
| xfs_filestream_unmount(mp); |
| out_free_sb: |
| xfs_freesb(mp); |
| out_destroy_counters: |
| xfs_icsb_destroy_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: |
| /* |
| * Blow away any referenced inode in the filestreams cache. |
| * This can and will cause log traffic as inodes go inactive |
| * here. |
| */ |
| xfs_filestream_unmount(mp); |
| |
| xfs_flush_buftarg(mp->m_ddev_targp, 1); |
| |
| xfs_unmountfs(mp); |
| xfs_syncd_stop(mp); |
| goto out_free_sb; |
| } |
| |
| 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 int |
| xfs_fs_nr_cached_objects( |
| struct super_block *sb) |
| { |
| return xfs_reclaim_inodes_count(XFS_M(sb)); |
| } |
| |
| static void |
| xfs_fs_free_cached_objects( |
| struct super_block *sb, |
| int nr_to_scan) |
| { |
| xfs_reclaim_inodes_nr(XFS_M(sb), nr_to_scan); |
| } |
| |
| static const struct super_operations xfs_super_operations = { |
| .alloc_inode = xfs_fs_alloc_inode, |
| .destroy_inode = xfs_fs_destroy_inode, |
| .dirty_inode = xfs_fs_dirty_inode, |
| .evict_inode = xfs_fs_evict_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, |
| }; |
| |
| STATIC int __init |
| xfs_init_zones(void) |
| { |
| |
| xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); |
| if (!xfs_ioend_zone) |
| goto out; |
| |
| xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, |
| xfs_ioend_zone); |
| if (!xfs_ioend_pool) |
| goto out_destroy_ioend_zone; |
| |
| xfs_log_ticket_zone = kmem_zone_init(sizeof(xlog_ticket_t), |
| "xfs_log_ticket"); |
| if (!xfs_log_ticket_zone) |
| goto out_destroy_ioend_pool; |
| |
| xfs_bmap_free_item_zone = kmem_zone_init(sizeof(xfs_bmap_free_item_t), |
| "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_dabuf_zone = kmem_zone_init(sizeof(xfs_dabuf_t), "xfs_dabuf"); |
| if (!xfs_dabuf_zone) |
| goto out_destroy_da_state_zone; |
| |
| xfs_ifork_zone = kmem_zone_init(sizeof(xfs_ifork_t), "xfs_ifork"); |
| if (!xfs_ifork_zone) |
| goto out_destroy_dabuf_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(xfs_buf_log_item_t) + |
| (((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) / |
| NBWORD) * sizeof(int))), "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, |
| 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; |
| |
| return 0; |
| |
| 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_dabuf_zone: |
| kmem_zone_destroy(xfs_dabuf_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_destroy_ioend_pool: |
| mempool_destroy(xfs_ioend_pool); |
| out_destroy_ioend_zone: |
| kmem_zone_destroy(xfs_ioend_zone); |
| out: |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_zones(void) |
| { |
| 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_dabuf_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); |
| mempool_destroy(xfs_ioend_pool); |
| kmem_zone_destroy(xfs_ioend_zone); |
| |
| } |
| |
| STATIC int __init |
| xfs_init_workqueues(void) |
| { |
| /* |
| * We never want to the same work item to run twice, reclaiming inodes |
| * or idling the log is not going to get any faster by multiple CPUs |
| * competing for ressources. Use the default large max_active value |
| * so that even lots of filesystems can perform these task in parallel. |
| */ |
| xfs_syncd_wq = alloc_workqueue("xfssyncd", WQ_NON_REENTRANT, 0); |
| if (!xfs_syncd_wq) |
| return -ENOMEM; |
| |
| /* |
| * 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, 0); |
| if (!xfs_alloc_wq) |
| goto out_destroy_syncd; |
| |
| return 0; |
| |
| out_destroy_syncd: |
| destroy_workqueue(xfs_syncd_wq); |
| return -ENOMEM; |
| } |
| |
| STATIC void |
| xfs_destroy_workqueues(void) |
| { |
| destroy_workqueue(xfs_alloc_wq); |
| destroy_workqueue(xfs_syncd_wq); |
| } |
| |
| STATIC int __init |
| init_xfs_fs(void) |
| { |
| int error; |
| |
| printk(KERN_INFO XFS_VERSION_STRING " with " |
| XFS_BUILD_OPTIONS " enabled\n"); |
| |
| 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_filestream_init(); |
| if (error) |
| goto out_mru_cache_uninit; |
| |
| error = xfs_buf_init(); |
| if (error) |
| goto out_filestream_uninit; |
| |
| error = xfs_init_procfs(); |
| if (error) |
| goto out_buf_terminate; |
| |
| error = xfs_sysctl_register(); |
| if (error) |
| goto out_cleanup_procfs; |
| |
| error = xfs_qm_init(); |
| if (error) |
| goto out_sysctl_unregister; |
| |
| error = register_filesystem(&xfs_fs_type); |
| if (error) |
| goto out_qm_exit; |
| return 0; |
| |
| out_qm_exit: |
| xfs_qm_exit(); |
| out_sysctl_unregister: |
| xfs_sysctl_unregister(); |
| out_cleanup_procfs: |
| xfs_cleanup_procfs(); |
| out_buf_terminate: |
| xfs_buf_terminate(); |
| out_filestream_uninit: |
| xfs_filestream_uninit(); |
| 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); |
| xfs_sysctl_unregister(); |
| xfs_cleanup_procfs(); |
| xfs_buf_terminate(); |
| xfs_filestream_uninit(); |
| xfs_mru_cache_uninit(); |
| xfs_destroy_workqueues(); |
| xfs_destroy_zones(); |
| } |
| |
| 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"); |