| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ian Kent | 3170 | 33.42% | 14 | 4.07% |
| Christoph Hellwig | 1860 | 19.61% | 81 | 23.55% |
| David Chinner | 1317 | 13.89% | 68 | 19.77% |
| Darrick J. Wong | 1302 | 13.73% | 73 | 21.22% |
| Eric Sandeen | 387 | 4.08% | 11 | 3.20% |
| Carlos Maiolino | 256 | 2.70% | 6 | 1.74% |
| Brian Foster | 195 | 2.06% | 11 | 3.20% |
| Pavel Reichl | 189 | 1.99% | 3 | 0.87% |
| Ira Weiny | 135 | 1.42% | 1 | 0.29% |
| Bill O'Donnell | 117 | 1.23% | 4 | 1.16% |
| Nathan Scott | 103 | 1.09% | 14 | 4.07% |
| Allison Henderson | 60 | 0.63% | 4 | 1.16% |
| Christian Brauner | 50 | 0.53% | 3 | 0.87% |
| Stephen Lord | 37 | 0.39% | 4 | 1.16% |
| Abhijit Pawar | 33 | 0.35% | 1 | 0.29% |
| Jan Kara | 28 | 0.30% | 3 | 0.87% |
| Dan J Williams | 26 | 0.27% | 1 | 0.29% |
| Russell Cattelan | 26 | 0.27% | 1 | 0.29% |
| Waiman Long | 23 | 0.24% | 1 | 0.29% |
| Kenjiro Nakayama | 16 | 0.17% | 1 | 0.29% |
| Chengguang Xu | 11 | 0.12% | 1 | 0.29% |
| Al Viro | 11 | 0.12% | 4 | 1.16% |
| Lachlan McIlroy | 10 | 0.11% | 3 | 0.87% |
| Stuart Brodsky | 10 | 0.11% | 1 | 0.29% |
| Shiyang Ruan | 10 | 0.11% | 1 | 0.29% |
| Deepa Dinamani | 10 | 0.11% | 1 | 0.29% |
| Alex Elder | 9 | 0.09% | 1 | 0.29% |
| Lukas Czerner | 9 | 0.09% | 1 | 0.29% |
| Lukas Herbolt | 8 | 0.08% | 1 | 0.29% |
| Chandra Seetharaman | 7 | 0.07% | 2 | 0.58% |
| zhengbin | 6 | 0.06% | 1 | 0.29% |
| Andi Kleen | 6 | 0.06% | 1 | 0.29% |
| Richard Wareing | 5 | 0.05% | 1 | 0.29% |
| Eric W. Biedermann | 5 | 0.05% | 1 | 0.29% |
| Takashi Sato | 4 | 0.04% | 1 | 0.29% |
| Kirill A. Shutemov | 4 | 0.04% | 1 | 0.29% |
| Vladimir Davydov | 4 | 0.04% | 1 | 0.29% |
| Adam Borowski | 4 | 0.04% | 1 | 0.29% |
| Andrew Morton | 3 | 0.03% | 2 | 0.58% |
| Timothy Shimmin | 3 | 0.03% | 1 | 0.29% |
| Theodore Y. Ts'o | 2 | 0.02% | 1 | 0.29% |
| Alexey Dobriyan | 2 | 0.02% | 1 | 0.29% |
| Dan Carpenter | 2 | 0.02% | 1 | 0.29% |
| Matthew Garrett | 1 | 0.01% | 1 | 0.29% |
| Namjae Jeon | 1 | 0.01% | 1 | 0.29% |
| SF Markus Elfring | 1 | 0.01% | 1 | 0.29% |
| Jie Liu | 1 | 0.01% | 1 | 0.29% |
| Matthew Wilcox | 1 | 0.01% | 1 | 0.29% |
| Frederik Schwarzer | 1 | 0.01% | 1 | 0.29% |
| Anthony Iliopoulos | 1 | 0.01% | 1 | 0.29% |
| Xia Kaixu | 1 | 0.01% | 1 | 0.29% |
| Uwe Kleine-König | 1 | 0.01% | 1 | 0.29% |
| Total | 9484 | 344 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2000-2006 Silicon Graphics, Inc. * All Rights Reserved. */ #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_inode.h" #include "xfs_btree.h" #include "xfs_bmap.h" #include "xfs_alloc.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_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 "xfs_pwork.h" #include "xfs_ag.h" #include "xfs_defer.h" #include "xfs_attr_item.h" #include "xfs_xattr.h" #include "xfs_iunlink_item.h" #include "xfs_dahash_test.h" #include "xfs_rtbitmap.h" #include "xfs_exchmaps_item.h" #include "xfs_parent.h" #include "scrub/stats.h" #include "scrub/rcbag_btree.h" #include <linux/magic.h> #include <linux/fs_context.h> #include <linux/fs_parser.h> static const struct super_operations xfs_super_operations; static struct dentry *xfs_debugfs; /* top-level xfs debugfs dir */ static struct kset *xfs_kset; /* top-level xfs sysfs dir */ #ifdef DEBUG static struct xfs_kobj xfs_dbg_kobj; /* global debug sysfs attrs */ #endif enum xfs_dax_mode { XFS_DAX_INODE = 0, XFS_DAX_ALWAYS = 1, XFS_DAX_NEVER = 2, }; static void xfs_mount_set_dax_mode( struct xfs_mount *mp, enum xfs_dax_mode mode) { switch (mode) { case XFS_DAX_INODE: mp->m_features &= ~(XFS_FEAT_DAX_ALWAYS | XFS_FEAT_DAX_NEVER); break; case XFS_DAX_ALWAYS: mp->m_features |= XFS_FEAT_DAX_ALWAYS; mp->m_features &= ~XFS_FEAT_DAX_NEVER; break; case XFS_DAX_NEVER: mp->m_features |= XFS_FEAT_DAX_NEVER; mp->m_features &= ~XFS_FEAT_DAX_ALWAYS; break; } } static const struct constant_table dax_param_enums[] = { {"inode", XFS_DAX_INODE }, {"always", XFS_DAX_ALWAYS }, {"never", XFS_DAX_NEVER }, {} }; /* * Table driven mount option parser. */ enum { Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups, Opt_allocsize, Opt_norecovery, 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_dax_enum, }; static const struct fs_parameter_spec xfs_fs_parameters[] = { fsparam_u32("logbufs", Opt_logbufs), fsparam_string("logbsize", Opt_logbsize), fsparam_string("logdev", Opt_logdev), fsparam_string("rtdev", Opt_rtdev), fsparam_flag("wsync", Opt_wsync), fsparam_flag("noalign", Opt_noalign), fsparam_flag("swalloc", Opt_swalloc), fsparam_u32("sunit", Opt_sunit), fsparam_u32("swidth", Opt_swidth), fsparam_flag("nouuid", Opt_nouuid), fsparam_flag("grpid", Opt_grpid), fsparam_flag("nogrpid", Opt_nogrpid), fsparam_flag("bsdgroups", Opt_bsdgroups), fsparam_flag("sysvgroups", Opt_sysvgroups), fsparam_string("allocsize", Opt_allocsize), fsparam_flag("norecovery", Opt_norecovery), fsparam_flag("inode64", Opt_inode64), fsparam_flag("inode32", Opt_inode32), fsparam_flag("ikeep", Opt_ikeep), fsparam_flag("noikeep", Opt_noikeep), fsparam_flag("largeio", Opt_largeio), fsparam_flag("nolargeio", Opt_nolargeio), fsparam_flag("attr2", Opt_attr2), fsparam_flag("noattr2", Opt_noattr2), fsparam_flag("filestreams", Opt_filestreams), fsparam_flag("quota", Opt_quota), fsparam_flag("noquota", Opt_noquota), fsparam_flag("usrquota", Opt_usrquota), fsparam_flag("grpquota", Opt_grpquota), fsparam_flag("prjquota", Opt_prjquota), fsparam_flag("uquota", Opt_uquota), fsparam_flag("gquota", Opt_gquota), fsparam_flag("pquota", Opt_pquota), fsparam_flag("uqnoenforce", Opt_uqnoenforce), fsparam_flag("gqnoenforce", Opt_gqnoenforce), fsparam_flag("pqnoenforce", Opt_pqnoenforce), fsparam_flag("qnoenforce", Opt_qnoenforce), fsparam_flag("discard", Opt_discard), fsparam_flag("nodiscard", Opt_nodiscard), fsparam_flag("dax", Opt_dax), fsparam_enum("dax", Opt_dax_enum, dax_param_enums), {} }; struct proc_xfs_info { uint64_t flag; char *str; }; static int xfs_fs_show_options( struct seq_file *m, struct dentry *root) { static struct proc_xfs_info xfs_info_set[] = { /* the few simple ones we can get from the mount struct */ { XFS_FEAT_IKEEP, ",ikeep" }, { XFS_FEAT_WSYNC, ",wsync" }, { XFS_FEAT_NOALIGN, ",noalign" }, { XFS_FEAT_SWALLOC, ",swalloc" }, { XFS_FEAT_NOUUID, ",nouuid" }, { XFS_FEAT_NORECOVERY, ",norecovery" }, { XFS_FEAT_ATTR2, ",attr2" }, { XFS_FEAT_FILESTREAMS, ",filestreams" }, { XFS_FEAT_GRPID, ",grpid" }, { XFS_FEAT_DISCARD, ",discard" }, { XFS_FEAT_LARGE_IOSIZE, ",largeio" }, { XFS_FEAT_DAX_ALWAYS, ",dax=always" }, { XFS_FEAT_DAX_NEVER, ",dax=never" }, { 0, NULL } }; struct xfs_mount *mp = XFS_M(root->d_sb); struct proc_xfs_info *xfs_infop; for (xfs_infop = xfs_info_set; xfs_infop->flag; xfs_infop++) { if (mp->m_features & xfs_infop->flag) seq_puts(m, xfs_infop->str); } seq_printf(m, ",inode%d", xfs_has_small_inums(mp) ? 32 : 64); if (xfs_has_allocsize(mp)) seq_printf(m, ",allocsize=%dk", (1 << mp->m_allocsize_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_ENFD) seq_puts(m, ",usrquota"); else if (mp->m_qflags & XFS_UQUOTA_ACCT) seq_puts(m, ",uqnoenforce"); if (mp->m_qflags & XFS_PQUOTA_ENFD) seq_puts(m, ",prjquota"); else if (mp->m_qflags & XFS_PQUOTA_ACCT) seq_puts(m, ",pqnoenforce"); if (mp->m_qflags & XFS_GQUOTA_ENFD) seq_puts(m, ",grpquota"); else if (mp->m_qflags & XFS_GQUOTA_ACCT) seq_puts(m, ",gqnoenforce"); if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT)) seq_puts(m, ",noquota"); return 0; } static bool xfs_set_inode_alloc_perag( struct xfs_perag *pag, xfs_ino_t ino, xfs_agnumber_t max_metadata) { if (!xfs_is_inode32(pag->pag_mount)) { set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); return false; } if (ino > XFS_MAXINUMBER_32) { clear_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); return false; } set_bit(XFS_AGSTATE_ALLOWS_INODES, &pag->pag_opstate); if (pag->pag_agno < max_metadata) set_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); else clear_bit(XFS_AGSTATE_PREFERS_METADATA, &pag->pag_opstate); return true; } /* * Set parameters for inode allocation heuristics, taking into account * filesystem size and inode32/inode64 mount options; i.e. specifically * whether or not XFS_FEAT_SMALL_INUMS is set. * * Inode allocation patterns are altered only if inode32 is requested * (XFS_FEAT_SMALL_INUMS), and the filesystem is sufficiently large. * If altered, XFS_OPSTATE_INODE32 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 (M_IGEO(mp)->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_AGB_TO_AGINO(mp, sbp->sb_agblocks - 1); 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_OPSTATE_INODE32 if we must alter * the allocator to accommodate the request. */ if (xfs_has_small_inums(mp) && ino > XFS_MAXINUMBER_32) set_bit(XFS_OPSTATE_INODE32, &mp->m_opstate); else clear_bit(XFS_OPSTATE_INODE32, &mp->m_opstate); 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 (xfs_set_inode_alloc_perag(pag, ino, max_metadata)) maxagi++; xfs_perag_put(pag); } return xfs_is_inode32(mp) ? maxagi : agcount; } static int xfs_setup_dax_always( struct xfs_mount *mp) { if (!mp->m_ddev_targp->bt_daxdev && (!mp->m_rtdev_targp || !mp->m_rtdev_targp->bt_daxdev)) { xfs_alert(mp, "DAX unsupported by block device. Turning off DAX."); goto disable_dax; } if (mp->m_super->s_blocksize != PAGE_SIZE) { xfs_alert(mp, "DAX not supported for blocksize. Turning off DAX."); goto disable_dax; } if (xfs_has_reflink(mp) && bdev_is_partition(mp->m_ddev_targp->bt_bdev)) { xfs_alert(mp, "DAX and reflink cannot work with multi-partitions!"); return -EINVAL; } return 0; disable_dax: xfs_mount_set_dax_mode(mp, XFS_DAX_NEVER); return 0; } STATIC int xfs_blkdev_get( xfs_mount_t *mp, const char *name, struct file **bdev_filep) { int error = 0; *bdev_filep = bdev_file_open_by_path(name, BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES, mp->m_super, &fs_holder_ops); if (IS_ERR(*bdev_filep)) { error = PTR_ERR(*bdev_filep); *bdev_filep = NULL; xfs_warn(mp, "Invalid device [%s], error=%d", name, error); } return error; } STATIC void xfs_shutdown_devices( struct xfs_mount *mp) { /* * Udev is triggered whenever anyone closes a block device or unmounts * a file systemm on a block device. * The default udev rules invoke blkid to read the fs super and create * symlinks to the bdev under /dev/disk. For this, it uses buffered * reads through the page cache. * * xfs_db also uses buffered reads to examine metadata. There is no * coordination between xfs_db and udev, which means that they can run * concurrently. Note there is no coordination between the kernel and * blkid either. * * On a system with 64k pages, the page cache can cache the superblock * and the root inode (and hence the root directory) with the same 64k * page. If udev spawns blkid after the mkfs and the system is busy * enough that it is still running when xfs_db starts up, they'll both * read from the same page in the pagecache. * * The unmount writes updated inode metadata to disk directly. The XFS * buffer cache does not use the bdev pagecache, so it needs to * invalidate that pagecache on unmount. If the above scenario occurs, * the pagecache no longer reflects what's on disk, xfs_db reads the * stale metadata, and fails to find /a. Most of the time this succeeds * because closing a bdev invalidates the page cache, but when processes * race, everyone loses. */ if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) { blkdev_issue_flush(mp->m_logdev_targp->bt_bdev); invalidate_bdev(mp->m_logdev_targp->bt_bdev); } if (mp->m_rtdev_targp) { blkdev_issue_flush(mp->m_rtdev_targp->bt_bdev); invalidate_bdev(mp->m_rtdev_targp->bt_bdev); } blkdev_issue_flush(mp->m_ddev_targp->bt_bdev); invalidate_bdev(mp->m_ddev_targp->bt_bdev); } /* * 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 super_block *sb = mp->m_super; struct block_device *ddev = sb->s_bdev; struct file *logdev_file = NULL, *rtdev_file = 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_file); if (error) return error; } if (mp->m_rtname) { error = xfs_blkdev_get(mp, mp->m_rtname, &rtdev_file); if (error) goto out_close_logdev; if (file_bdev(rtdev_file) == ddev || (logdev_file && file_bdev(rtdev_file) == file_bdev(logdev_file))) { 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, sb->s_bdev_file); if (!mp->m_ddev_targp) goto out_close_rtdev; if (rtdev_file) { mp->m_rtdev_targp = xfs_alloc_buftarg(mp, rtdev_file); if (!mp->m_rtdev_targp) goto out_free_ddev_targ; } if (logdev_file && file_bdev(logdev_file) != ddev) { mp->m_logdev_targp = xfs_alloc_buftarg(mp, logdev_file); if (!mp->m_logdev_targp) goto out_free_rtdev_targ; } else { mp->m_logdev_targp = mp->m_ddev_targp; /* Handle won't be used, drop it */ if (logdev_file) bdev_fput(logdev_file); } return 0; out_free_rtdev_targ: if (mp->m_rtdev_targp) xfs_free_buftarg(mp->m_rtdev_targp); out_free_ddev_targ: xfs_free_buftarg(mp->m_ddev_targp); out_close_rtdev: if (rtdev_file) bdev_fput(rtdev_file); out_close_logdev: if (logdev_file) bdev_fput(logdev_file); 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_has_sector(mp)) 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", XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 1, mp->m_super->s_id); if (!mp->m_buf_workqueue) goto out; mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s", XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 0, mp->m_super->s_id); if (!mp->m_unwritten_workqueue) goto out_destroy_buf; mp->m_reclaim_workqueue = alloc_workqueue("xfs-reclaim/%s", XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 0, mp->m_super->s_id); if (!mp->m_reclaim_workqueue) goto out_destroy_unwritten; mp->m_blockgc_wq = alloc_workqueue("xfs-blockgc/%s", XFS_WQFLAGS(WQ_UNBOUND | WQ_FREEZABLE | WQ_MEM_RECLAIM), 0, mp->m_super->s_id); if (!mp->m_blockgc_wq) goto out_destroy_reclaim; mp->m_inodegc_wq = alloc_workqueue("xfs-inodegc/%s", XFS_WQFLAGS(WQ_FREEZABLE | WQ_MEM_RECLAIM), 1, mp->m_super->s_id); if (!mp->m_inodegc_wq) goto out_destroy_blockgc; mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", XFS_WQFLAGS(WQ_FREEZABLE), 0, mp->m_super->s_id); if (!mp->m_sync_workqueue) goto out_destroy_inodegc; return 0; out_destroy_inodegc: destroy_workqueue(mp->m_inodegc_wq); out_destroy_blockgc: destroy_workqueue(mp->m_blockgc_wq); out_destroy_reclaim: destroy_workqueue(mp->m_reclaim_workqueue); out_destroy_unwritten: destroy_workqueue(mp->m_unwritten_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_blockgc_wq); destroy_workqueue(mp->m_inodegc_wq); destroy_workqueue(mp->m_reclaim_workqueue); destroy_workqueue(mp->m_unwritten_workqueue); destroy_workqueue(mp->m_buf_workqueue); } static void xfs_flush_inodes_worker( struct work_struct *work) { struct xfs_mount *mp = container_of(work, struct xfs_mount, m_flush_inodes_work); struct super_block *sb = mp->m_super; if (down_read_trylock(&sb->s_umount)) { sync_inodes_sb(sb); up_read(&sb->s_umount); } } /* * 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) { /* * If flush_work() returns true then that means we waited for a flush * which was already in progress. Don't bother running another scan. */ if (flush_work(&mp->m_flush_inodes_work)) return; queue_work(mp->m_sync_workqueue, &mp->m_flush_inodes_work); flush_work(&mp->m_flush_inodes_work); } /* 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); 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); xfs_inode_mark_reclaimable(ip); } 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; if (!(inode->i_sb->s_flags & SB_LAZYTIME)) return; /* * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC) * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed * in flags possibly together with I_DIRTY_SYNC. */ if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME)) return; if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp)) return; xfs_ilock(ip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); xfs_trans_commit(tp); } /* * 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); init_rwsem(&ip->i_lock); } /* * 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(xlog_recovery_needed(ip->i_mount->m_log)); return 0; } return generic_drop_inode(inode); } static void xfs_mount_free( struct xfs_mount *mp) { if (mp->m_logdev_targp && mp->m_logdev_targp != mp->m_ddev_targp) xfs_free_buftarg(mp->m_logdev_targp); if (mp->m_rtdev_targp) xfs_free_buftarg(mp->m_rtdev_targp); if (mp->m_ddev_targp) xfs_free_buftarg(mp->m_ddev_targp); debugfs_remove(mp->m_debugfs); kfree(mp->m_rtname); kfree(mp->m_logname); kfree(mp); } STATIC int xfs_fs_sync_fs( struct super_block *sb, int wait) { struct xfs_mount *mp = XFS_M(sb); int error; trace_xfs_fs_sync_fs(mp, __return_address); /* * Doing anything during the async pass would be counterproductive. */ if (!wait) return 0; error = xfs_log_force(mp, XFS_LOG_SYNC); if (error) return error; 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); } /* * If we are called with page faults frozen out, it means we are about * to freeze the transaction subsystem. Take the opportunity to shut * down inodegc because once SB_FREEZE_FS is set it's too late to * prevent inactivation races with freeze. The fs doesn't get called * again by the freezing process until after SB_FREEZE_FS has been set, * so it's now or never. Same logic applies to speculative allocation * garbage collection. * * We don't care if this is a normal syncfs call that does this or * freeze that does this - we can run this multiple times without issue * and we won't race with a restart because a restart can only occur * when the state is either SB_FREEZE_FS or SB_FREEZE_COMPLETE. */ if (sb->s_writers.frozen == SB_FREEZE_PAGEFAULT) { xfs_inodegc_stop(mp); xfs_blockgc_stop(mp); } 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; /* * Expedite background inodegc but don't wait. We do not want to block * here waiting hours for a billion extent file to be truncated. */ xfs_inodegc_push(mp); statp->f_type = XFS_SUPER_MAGIC; statp->f_namelen = MAXNAMELEN - 1; id = huge_encode_dev(mp->m_ddev_targp->bt_dev); statp->f_fsid = u64_to_fsid(id); 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); /* make sure statp->f_bfree does not underflow */ statp->f_bfree = max_t(int64_t, 0, fdblocks - xfs_fdblocks_unavailable(mp)); statp->f_bavail = statp->f_bfree; fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree); statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER); if (M_IGEO(mp)->maxicount) statp->f_files = min_t(typeof(statp->f_files), statp->f_files, M_IGEO(mp)->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_diflags & XFS_DIFLAG_PROJINHERIT) && ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) == (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD)) xfs_qm_statvfs(ip, statp); if (XFS_IS_REALTIME_MOUNT(mp) && (ip->i_diflags & (XFS_DIFLAG_RTINHERIT | XFS_DIFLAG_REALTIME))) { s64 freertx; statp->f_blocks = sbp->sb_rblocks; freertx = percpu_counter_sum_positive(&mp->m_frextents); statp->f_bavail = statp->f_bfree = xfs_rtx_to_rtb(mp, freertx); } return 0; } STATIC void xfs_save_resvblks(struct xfs_mount *mp) { mp->m_resblks_save = mp->m_resblks; xfs_reserve_blocks(mp, 0); } 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); } /* * 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); unsigned int flags; int ret; /* * The filesystem is now frozen far enough that memory reclaim * cannot safely operate on the filesystem. Hence we need to * set a GFP_NOFS context here to avoid recursion deadlocks. */ flags = memalloc_nofs_save(); xfs_save_resvblks(mp); ret = xfs_log_quiesce(mp); memalloc_nofs_restore(flags); /* * For read-write filesystems, we need to restart the inodegc on error * because we stopped it at SB_FREEZE_PAGEFAULT level and a thaw is not * going to be run to restart it now. We are at SB_FREEZE_FS level * here, so we can restart safely without racing with a stop in * xfs_fs_sync_fs(). */ if (ret && !xfs_is_readonly(mp)) { xfs_blockgc_start(mp); xfs_inodegc_start(mp); } return ret; } 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); /* * Don't reactivate the inodegc worker on a readonly filesystem because * inodes are sent directly to reclaim. Don't reactivate the blockgc * worker because there are no speculative preallocations on a readonly * filesystem. */ if (!xfs_is_readonly(mp)) { xfs_blockgc_start(mp); xfs_inodegc_start(mp); } return 0; } /* * 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) { /* Fail a mount where the logbuf is smaller than the log stripe */ if (xfs_has_logv2(mp)) { 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_has_crc(mp) && xfs_has_noattr2(mp)) { xfs_warn(mp, "Cannot mount a V5 filesystem as noattr2. " "attr2 is always enabled for V5 filesystems."); return -EINVAL; } /* * prohibit r/w mounts of read-only filesystems */ if ((mp->m_sb.sb_flags & XFS_SBF_READONLY) && !xfs_is_readonly(mp)) { xfs_warn(mp, "cannot mount a read-only filesystem as read-write"); return -EROFS; } if ((mp->m_qflags & XFS_GQUOTA_ACCT) && (mp->m_qflags & XFS_PQUOTA_ACCT) && !xfs_has_pquotino(mp)) { 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; error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL); if (error) goto free_fdblocks; error = percpu_counter_init(&mp->m_delalloc_rtextents, 0, GFP_KERNEL); if (error) goto free_delalloc; error = percpu_counter_init(&mp->m_frextents, 0, GFP_KERNEL); if (error) goto free_delalloc_rt; return 0; free_delalloc_rt: percpu_counter_destroy(&mp->m_delalloc_rtextents); free_delalloc: percpu_counter_destroy(&mp->m_delalloc_blks); free_fdblocks: percpu_counter_destroy(&mp->m_fdblocks); 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); percpu_counter_set(&mp->m_frextents, mp->m_sb.sb_frextents); } 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); ASSERT(xfs_is_shutdown(mp) || percpu_counter_sum(&mp->m_delalloc_rtextents) == 0); percpu_counter_destroy(&mp->m_delalloc_rtextents); ASSERT(xfs_is_shutdown(mp) || percpu_counter_sum(&mp->m_delalloc_blks) == 0); percpu_counter_destroy(&mp->m_delalloc_blks); percpu_counter_destroy(&mp->m_frextents); } static int xfs_inodegc_init_percpu( struct xfs_mount *mp) { struct xfs_inodegc *gc; int cpu; mp->m_inodegc = alloc_percpu(struct xfs_inodegc); if (!mp->m_inodegc) return -ENOMEM; for_each_possible_cpu(cpu) { gc = per_cpu_ptr(mp->m_inodegc, cpu); gc->cpu = cpu; gc->mp = mp; init_llist_head(&gc->list); gc->items = 0; gc->error = 0; INIT_DELAYED_WORK(&gc->work, xfs_inodegc_worker); } return 0; } static void xfs_inodegc_free_percpu( struct xfs_mount *mp) { if (!mp->m_inodegc) return; free_percpu(mp->m_inodegc); } static void xfs_fs_put_super( struct super_block *sb) { struct xfs_mount *mp = XFS_M(sb); xfs_notice(mp, "Unmounting Filesystem %pU", &mp->m_sb.sb_uuid); xfs_filestream_unmount(mp); xfs_unmountfs(mp); xfs_freesb(mp); xchk_mount_stats_free(mp); free_percpu(mp->m_stats.xs_stats); xfs_inodegc_free_percpu(mp); xfs_destroy_percpu_counters(mp); xfs_destroy_mount_workqueues(mp); xfs_shutdown_devices(mp); } static long xfs_fs_nr_cached_objects( struct super_block *sb, struct shrink_control *sc) { /* Paranoia: catch incorrect calls during mount setup or teardown */ if (WARN_ON_ONCE(!sb->s_fs_info)) return 0; 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 void xfs_fs_shutdown( struct super_block *sb) { xfs_force_shutdown(XFS_M(sb), SHUTDOWN_DEVICE_REMOVED); } 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, .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, .show_options = xfs_fs_show_options, .nr_cached_objects = xfs_fs_nr_cached_objects, .free_cached_objects = xfs_fs_free_cached_objects, .shutdown = xfs_fs_shutdown, }; static int suffix_kstrtoint( const char *s, unsigned int base, int *res) { int last, shift_left_factor = 0, _res; char *value; int ret = 0; value = kstrdup(s, GFP_KERNEL); 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; } static inline void xfs_fs_warn_deprecated( struct fs_context *fc, struct fs_parameter *param, uint64_t flag, bool value) { /* Don't print the warning if reconfiguring and current mount point * already had the flag set */ if ((fc->purpose & FS_CONTEXT_FOR_RECONFIGURE) && !!(XFS_M(fc->root->d_sb)->m_features & flag) == value) return; xfs_warn(fc->s_fs_info, "%s mount option is deprecated.", param->key); } /* * Set mount state from a mount option. * * NOTE: mp->m_super is NULL here! */ static int xfs_fs_parse_param( struct fs_context *fc, struct fs_parameter *param) { struct xfs_mount *parsing_mp = fc->s_fs_info; struct fs_parse_result result; int size = 0; int opt; opt = fs_parse(fc, xfs_fs_parameters, param, &result); if (opt < 0) return opt; switch (opt) { case Opt_logbufs: parsing_mp->m_logbufs = result.uint_32; return 0; case Opt_logbsize: if (suffix_kstrtoint(param->string, 10, &parsing_mp->m_logbsize)) return -EINVAL; return 0; case Opt_logdev: kfree(parsing_mp->m_logname); parsing_mp->m_logname = kstrdup(param->string, GFP_KERNEL); if (!parsing_mp->m_logname) return -ENOMEM; return 0; case Opt_rtdev: kfree(parsing_mp->m_rtname); parsing_mp->m_rtname = kstrdup(param->string, GFP_KERNEL); if (!parsing_mp->m_rtname) return -ENOMEM; return 0; case Opt_allocsize: if (suffix_kstrtoint(param->string, 10, &size)) return -EINVAL; parsing_mp->m_allocsize_log = ffs(size) - 1; parsing_mp->m_features |= XFS_FEAT_ALLOCSIZE; return 0; case Opt_grpid: case Opt_bsdgroups: parsing_mp->m_features |= XFS_FEAT_GRPID; return 0; case Opt_nogrpid: case Opt_sysvgroups: parsing_mp->m_features &= ~XFS_FEAT_GRPID; return 0; case Opt_wsync: parsing_mp->m_features |= XFS_FEAT_WSYNC; return 0; case Opt_norecovery: parsing_mp->m_features |= XFS_FEAT_NORECOVERY; return 0; case Opt_noalign: parsing_mp->m_features |= XFS_FEAT_NOALIGN; return 0; case Opt_swalloc: parsing_mp->m_features |= XFS_FEAT_SWALLOC; return 0; case Opt_sunit: parsing_mp->m_dalign = result.uint_32; return 0; case Opt_swidth: parsing_mp->m_swidth = result.uint_32; return 0; case Opt_inode32: parsing_mp->m_features |= XFS_FEAT_SMALL_INUMS; return 0; case Opt_inode64: parsing_mp->m_features &= ~XFS_FEAT_SMALL_INUMS; return 0; case Opt_nouuid: parsing_mp->m_features |= XFS_FEAT_NOUUID; return 0; case Opt_largeio: parsing_mp->m_features |= XFS_FEAT_LARGE_IOSIZE; return 0; case Opt_nolargeio: parsing_mp->m_features &= ~XFS_FEAT_LARGE_IOSIZE; return 0; case Opt_filestreams: parsing_mp->m_features |= XFS_FEAT_FILESTREAMS; return 0; case Opt_noquota: parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT; parsing_mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD; return 0; case Opt_quota: case Opt_uquota: case Opt_usrquota: parsing_mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ENFD); return 0; case Opt_qnoenforce: case Opt_uqnoenforce: parsing_mp->m_qflags |= XFS_UQUOTA_ACCT; parsing_mp->m_qflags &= ~XFS_UQUOTA_ENFD; return 0; case Opt_pquota: case Opt_prjquota: parsing_mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ENFD); return 0; case Opt_pqnoenforce: parsing_mp->m_qflags |= XFS_PQUOTA_ACCT; parsing_mp->m_qflags &= ~XFS_PQUOTA_ENFD; return 0; case Opt_gquota: case Opt_grpquota: parsing_mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ENFD); return 0; case Opt_gqnoenforce: parsing_mp->m_qflags |= XFS_GQUOTA_ACCT; parsing_mp->m_qflags &= ~XFS_GQUOTA_ENFD; return 0; case Opt_discard: parsing_mp->m_features |= XFS_FEAT_DISCARD; return 0; case Opt_nodiscard: parsing_mp->m_features &= ~XFS_FEAT_DISCARD; return 0; #ifdef CONFIG_FS_DAX case Opt_dax: xfs_mount_set_dax_mode(parsing_mp, XFS_DAX_ALWAYS); return 0; case Opt_dax_enum: xfs_mount_set_dax_mode(parsing_mp, result.uint_32); return 0; #endif /* Following mount options will be removed in September 2025 */ case Opt_ikeep: xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, true); parsing_mp->m_features |= XFS_FEAT_IKEEP; return 0; case Opt_noikeep: xfs_fs_warn_deprecated(fc, param, XFS_FEAT_IKEEP, false); parsing_mp->m_features &= ~XFS_FEAT_IKEEP; return 0; case Opt_attr2: xfs_fs_warn_deprecated(fc, param, XFS_FEAT_ATTR2, true); parsing_mp->m_features |= XFS_FEAT_ATTR2; return 0; case Opt_noattr2: xfs_fs_warn_deprecated(fc, param, XFS_FEAT_NOATTR2, true); parsing_mp->m_features |= XFS_FEAT_NOATTR2; return 0; default: xfs_warn(parsing_mp, "unknown mount option [%s].", param->key); return -EINVAL; } return 0; } static int xfs_fs_validate_params( struct xfs_mount *mp) { /* No recovery flag requires a read-only mount */ if (xfs_has_norecovery(mp) && !xfs_is_readonly(mp)) { xfs_warn(mp, "no-recovery mounts must be read-only."); return -EINVAL; } /* * We have not read the superblock at this point, so only the attr2 * mount option can set the attr2 feature by this stage. */ if (xfs_has_attr2(mp) && xfs_has_noattr2(mp)) { xfs_warn(mp, "attr2 and noattr2 cannot both be specified."); return -EINVAL; } if (xfs_has_noalign(mp) && (mp->m_dalign || mp->m_swidth)) { xfs_warn(mp, "sunit and swidth options incompatible with the noalign option"); return -EINVAL; } if (!IS_ENABLED(CONFIG_XFS_QUOTA) && mp->m_qflags != 0) { xfs_warn(mp, "quota support not available in this kernel."); return -EINVAL; } if ((mp->m_dalign && !mp->m_swidth) || (!mp->m_dalign && mp->m_swidth)) { xfs_warn(mp, "sunit and swidth must be specified together"); return -EINVAL; } if (mp->m_dalign && (mp->m_swidth % mp->m_dalign != 0)) { xfs_warn(mp, "stripe width (%d) must be a multiple of the stripe unit (%d)", mp->m_swidth, mp->m_dalign); return -EINVAL; } 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 (xfs_has_allocsize(mp) && (mp->m_allocsize_log > XFS_MAX_IO_LOG || mp->m_allocsize_log < XFS_MIN_IO_LOG)) { xfs_warn(mp, "invalid log iosize: %d [not %d-%d]", mp->m_allocsize_log, XFS_MIN_IO_LOG, XFS_MAX_IO_LOG); return -EINVAL; } return 0; } struct dentry * xfs_debugfs_mkdir( const char *name, struct dentry *parent) { struct dentry *child; /* Apparently we're expected to ignore error returns?? */ child = debugfs_create_dir(name, parent); if (IS_ERR(child)) return NULL; return child; } static int xfs_fs_fill_super( struct super_block *sb, struct fs_context *fc) { struct xfs_mount *mp = sb->s_fs_info; struct inode *root; int flags = 0, error; mp->m_super = sb; /* * Copy VFS mount flags from the context now that all parameter parsing * is guaranteed to have been completed by either the old mount API or * the newer fsopen/fsconfig API. */ if (fc->sb_flags & SB_RDONLY) set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); if (fc->sb_flags & SB_DIRSYNC) mp->m_features |= XFS_FEAT_DIRSYNC; if (fc->sb_flags & SB_SYNCHRONOUS) mp->m_features |= XFS_FEAT_WSYNC; error = xfs_fs_validate_params(mp); if (error) return error; 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; /* * Delay mount work if the debug hook is set. This is debug * instrumention to coordinate simulation of xfs mount failures with * VFS superblock operations */ if (xfs_globals.mount_delay) { xfs_notice(mp, "Delaying mount for %d seconds.", xfs_globals.mount_delay); msleep(xfs_globals.mount_delay * 1000); } if (fc->sb_flags & SB_SILENT) flags |= XFS_MFSI_QUIET; error = xfs_open_devices(mp); if (error) return error; if (xfs_debugfs) { mp->m_debugfs = xfs_debugfs_mkdir(mp->m_super->s_id, xfs_debugfs); } else { mp->m_debugfs = NULL; } error = xfs_init_mount_workqueues(mp); if (error) goto out_shutdown_devices; error = xfs_init_percpu_counters(mp); if (error) goto out_destroy_workqueues; error = xfs_inodegc_init_percpu(mp); if (error) goto out_destroy_counters; /* 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_inodegc; } error = xchk_mount_stats_alloc(mp); if (error) goto out_free_stats; error = xfs_readsb(mp, flags); if (error) goto out_free_scrub_stats; error = xfs_finish_flags(mp); if (error) goto out_free_sb; error = xfs_setup_devices(mp); if (error) goto out_free_sb; /* * V4 support is undergoing deprecation. * * Note: this has to use an open coded m_features check as xfs_has_crc * always returns false for !CONFIG_XFS_SUPPORT_V4. */ if (!(mp->m_features & XFS_FEAT_CRC)) { if (!IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) { xfs_warn(mp, "Deprecated V4 format (crc=0) not supported by kernel."); error = -EINVAL; goto out_free_sb; } xfs_warn_once(mp, "Deprecated V4 format (crc=0) will not be supported after September 2030."); } /* ASCII case insensitivity is undergoing deprecation. */ if (xfs_has_asciici(mp)) { #ifdef CONFIG_XFS_SUPPORT_ASCII_CI xfs_warn_once(mp, "Deprecated ASCII case-insensitivity feature (ascii-ci=1) will not be supported after September 2030."); #else xfs_warn(mp, "Deprecated ASCII case-insensitivity feature (ascii-ci=1) not supported by kernel."); error = -EINVAL; goto out_free_sb; #endif } /* Filesystem claims it needs repair, so refuse the mount. */ if (xfs_has_needsrepair(mp)) { xfs_warn(mp, "Filesystem needs repair. Please run xfs_repair."); error = -EFSCORRUPTED; goto out_free_sb; } /* * Don't touch the filesystem if a user tool thinks it owns the primary * superblock. mkfs doesn't clear the flag from secondary supers, so * we don't check them at all. */ if (mp->m_sb.sb_inprogress) { xfs_warn(mp, "Offline file system operation in progress!"); error = -EFSCORRUPTED; goto out_free_sb; } /* * Until this is fixed only page-sized or smaller data blocks work. */ if (mp->m_sb.sb_blocksize > PAGE_SIZE) { xfs_warn(mp, "File system with blocksize %d bytes. " "Only pagesize (%ld) or less will currently work.", mp->m_sb.sb_blocksize, PAGE_SIZE); error = -ENOSYS; goto out_free_sb; } /* Ensure this filesystem fits in the page cache limits */ if (xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_dblocks) || xfs_sb_validate_fsb_count(&mp->m_sb, mp->m_sb.sb_rblocks)) { xfs_warn(mp, "file system too large to be mounted on this system."); error = -EFBIG; goto out_free_sb; } /* * XFS block mappings use 54 bits to store the logical block offset. * This should suffice to handle the maximum file size that the VFS * supports (currently 2^63 bytes on 64-bit and ULONG_MAX << PAGE_SHIFT * bytes on 32-bit), but as XFS and VFS have gotten the s_maxbytes * calculation wrong on 32-bit kernels in the past, we'll add a WARN_ON * to check this assertion. * * Avoid integer overflow by comparing the maximum bmbt offset to the * maximum pagecache offset in units of fs blocks. */ if (!xfs_verify_fileoff(mp, XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE))) { xfs_warn(mp, "MAX_LFS_FILESIZE block offset (%llu) exceeds extent map maximum (%llu)!", XFS_B_TO_FSBT(mp, MAX_LFS_FILESIZE), XFS_MAX_FILEOFF); error = -EINVAL; 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_SUPER_MAGIC; sb->s_blocksize = mp->m_sb.sb_blocksize; sb->s_blocksize_bits = ffs(sb->s_blocksize) - 1; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_max_links = XFS_MAXLINK; sb->s_time_gran = 1; if (xfs_has_bigtime(mp)) { sb->s_time_min = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MIN); sb->s_time_max = xfs_bigtime_to_unix(XFS_BIGTIME_TIME_MAX); } else { sb->s_time_min = XFS_LEGACY_TIME_MIN; sb->s_time_max = XFS_LEGACY_TIME_MAX; } trace_xfs_inode_timestamp_range(mp, sb->s_time_min, sb->s_time_max); sb->s_iflags |= SB_I_CGROUPWB; set_posix_acl_flag(sb); /* version 5 superblocks support inode version counters. */ if (xfs_has_crc(mp)) sb->s_flags |= SB_I_VERSION; if (xfs_has_dax_always(mp)) { error = xfs_setup_dax_always(mp); if (error) goto out_filestream_unmount; } if (xfs_has_discard(mp) && !bdev_max_discard_sectors(sb->s_bdev)) { xfs_warn(mp, "mounting with \"discard\" option, but the device does not support discard"); mp->m_features &= ~XFS_FEAT_DISCARD; } if (xfs_has_reflink(mp)) { if (mp->m_sb.sb_rblocks) { xfs_alert(mp, "reflink not compatible with realtime device!"); error = -EINVAL; goto out_filestream_unmount; } if (xfs_globals.always_cow) { xfs_info(mp, "using DEBUG-only always_cow mode."); mp->m_always_cow = true; } } if (xfs_has_rmapbt(mp) && mp->m_sb.sb_rblocks) { xfs_alert(mp, "reverse mapping btree not compatible with realtime device!"); error = -EINVAL; goto out_filestream_unmount; } if (xfs_has_exchange_range(mp)) xfs_warn(mp, "EXPERIMENTAL exchange-range feature enabled. Use at your own risk!"); if (xfs_has_parent(mp)) xfs_warn(mp, "EXPERIMENTAL parent pointer 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_scrub_stats: xchk_mount_stats_free(mp); out_free_stats: free_percpu(mp->m_stats.xs_stats); out_destroy_inodegc: xfs_inodegc_free_percpu(mp); out_destroy_counters: xfs_destroy_percpu_counters(mp); out_destroy_workqueues: xfs_destroy_mount_workqueues(mp); out_shutdown_devices: xfs_shutdown_devices(mp); return error; out_unmount: xfs_filestream_unmount(mp); xfs_unmountfs(mp); goto out_free_sb; } static int xfs_fs_get_tree( struct fs_context *fc) { return get_tree_bdev(fc, xfs_fs_fill_super); } static int xfs_remount_rw( struct xfs_mount *mp) { struct xfs_sb *sbp = &mp->m_sb; int error; if (xfs_has_norecovery(mp)) { xfs_warn(mp, "ro->rw transition prohibited on norecovery mount"); return -EINVAL; } if (xfs_sb_is_v5(sbp) && 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; } clear_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); /* * 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_blockgc_start(mp); /* Create the per-AG metadata reservation pool .*/ error = xfs_fs_reserve_ag_blocks(mp); if (error && error != -ENOSPC) return error; /* Re-enable the background inode inactivation worker. */ xfs_inodegc_start(mp); return 0; } static int xfs_remount_ro( struct xfs_mount *mp) { struct xfs_icwalk icw = { .icw_flags = XFS_ICWALK_FLAG_SYNC, }; int error; /* Flush all the dirty data to disk. */ error = sync_filesystem(mp->m_super); if (error) return error; /* * Cancel background eofb scanning so it cannot race with the final * log force+buftarg wait and deadlock the remount. */ xfs_blockgc_stop(mp); /* * Clear out all remaining COW staging extents and speculative post-EOF * preallocations so that we don't leave inodes requiring inactivation * cleanups during reclaim on a read-only mount. We must process every * cached inode, so this requires a synchronous cache scan. */ error = xfs_blockgc_free_space(mp, &icw); if (error) { xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); return error; } /* * Stop the inodegc background worker. xfs_fs_reconfigure already * flushed all pending inodegc work when it sync'd the filesystem. * The VFS holds s_umount, so we know that inodes cannot enter * xfs_fs_destroy_inode during a remount operation. In readonly mode * we send inodes straight to reclaim, so no inodes will be queued. */ xfs_inodegc_stop(mp); /* Free the per-AG metadata reservation pool. */ xfs_fs_unreserve_ag_blocks(mp); /* * 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); xfs_log_clean(mp); set_bit(XFS_OPSTATE_READONLY, &mp->m_opstate); return 0; } /* * 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. */ static int xfs_fs_reconfigure( struct fs_context *fc) { struct xfs_mount *mp = XFS_M(fc->root->d_sb); struct xfs_mount *new_mp = fc->s_fs_info; int flags = fc->sb_flags; int error; /* version 5 superblocks always support version counters. */ if (xfs_has_crc(mp)) fc->sb_flags |= SB_I_VERSION; error = xfs_fs_validate_params(new_mp); if (error) return error; /* inode32 -> inode64 */ if (xfs_has_small_inums(mp) && !xfs_has_small_inums(new_mp)) { mp->m_features &= ~XFS_FEAT_SMALL_INUMS; mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); } /* inode64 -> inode32 */ if (!xfs_has_small_inums(mp) && xfs_has_small_inums(new_mp)) { mp->m_features |= XFS_FEAT_SMALL_INUMS; mp->m_maxagi = xfs_set_inode_alloc(mp, mp->m_sb.sb_agcount); } /* ro -> rw */ if (xfs_is_readonly(mp) && !(flags & SB_RDONLY)) { error = xfs_remount_rw(mp); if (error) return error; } /* rw -> ro */ if (!xfs_is_readonly(mp) && (flags & SB_RDONLY)) { error = xfs_remount_ro(mp); if (error) return error; } return 0; } static void xfs_fs_free( struct fs_context *fc) { struct xfs_mount *mp = fc->s_fs_info; /* * mp is stored in the fs_context when it is initialized. * mp is transferred to the superblock on a successful mount, * but if an error occurs before the transfer we have to free * it here. */ if (mp) xfs_mount_free(mp); } static const struct fs_context_operations xfs_context_ops = { .parse_param = xfs_fs_parse_param, .get_tree = xfs_fs_get_tree, .reconfigure = xfs_fs_reconfigure, .free = xfs_fs_free, }; /* * WARNING: do not initialise any parameters in this function that depend on * mount option parsing having already been performed as this can be called from * fsopen() before any parameters have been set. */ static int xfs_init_fs_context( struct fs_context *fc) { struct xfs_mount *mp; mp = kzalloc(sizeof(struct xfs_mount), GFP_KERNEL | __GFP_NOFAIL); if (!mp) return -ENOMEM; spin_lock_init(&mp->m_sb_lock); INIT_RADIX_TREE(&mp->m_perag_tree, GFP_ATOMIC); spin_lock_init(&mp->m_perag_lock); mutex_init(&mp->m_growlock); INIT_WORK(&mp->m_flush_inodes_work, xfs_flush_inodes_worker); INIT_DELAYED_WORK(&mp->m_reclaim_work, xfs_reclaim_worker); mp->m_kobj.kobject.kset = xfs_kset; /* * We don't create the finobt per-ag space reservation until after log * recovery, so we must set this to true so that an ifree transaction * started during log recovery will not depend on space reservations * for finobt expansion. */ mp->m_finobt_nores = true; /* * These can be overridden by the mount option parsing. */ mp->m_logbufs = -1; mp->m_logbsize = -1; mp->m_allocsize_log = 16; /* 64k */ xfs_hooks_init(&mp->m_dir_update_hooks); fc->s_fs_info = mp; fc->ops = &xfs_context_ops; return 0; } static void xfs_kill_sb( struct super_block *sb) { kill_block_super(sb); xfs_mount_free(XFS_M(sb)); } static struct file_system_type xfs_fs_type = { .owner = THIS_MODULE, .name = "xfs", .init_fs_context = xfs_init_fs_context, .parameters = xfs_fs_parameters, .kill_sb = xfs_kill_sb, .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, }; MODULE_ALIAS_FS("xfs"); STATIC int __init xfs_init_caches(void) { int error; xfs_buf_cache = kmem_cache_create("xfs_buf", sizeof(struct xfs_buf), 0, SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT, NULL); if (!xfs_buf_cache) goto out; xfs_log_ticket_cache = kmem_cache_create("xfs_log_ticket", sizeof(struct xlog_ticket), 0, 0, NULL); if (!xfs_log_ticket_cache) goto out_destroy_buf_cache; error = xfs_btree_init_cur_caches(); if (error) goto out_destroy_log_ticket_cache; error = rcbagbt_init_cur_cache(); if (error) goto out_destroy_btree_cur_cache; error = xfs_defer_init_item_caches(); if (error) goto out_destroy_rcbagbt_cur_cache; xfs_da_state_cache = kmem_cache_create("xfs_da_state", sizeof(struct xfs_da_state), 0, 0, NULL); if (!xfs_da_state_cache) goto out_destroy_defer_item_cache; xfs_ifork_cache = kmem_cache_create("xfs_ifork", sizeof(struct xfs_ifork), 0, 0, NULL); if (!xfs_ifork_cache) goto out_destroy_da_state_cache; xfs_trans_cache = kmem_cache_create("xfs_trans", sizeof(struct xfs_trans), 0, 0, NULL); if (!xfs_trans_cache) goto out_destroy_ifork_cache; /* * The size of the cache-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_cache = kmem_cache_create("xfs_buf_item", sizeof(struct xfs_buf_log_item), 0, 0, NULL); if (!xfs_buf_item_cache) goto out_destroy_trans_cache; xfs_efd_cache = kmem_cache_create("xfs_efd_item", xfs_efd_log_item_sizeof(XFS_EFD_MAX_FAST_EXTENTS), 0, 0, NULL); if (!xfs_efd_cache) goto out_destroy_buf_item_cache; xfs_efi_cache = kmem_cache_create("xfs_efi_item", xfs_efi_log_item_sizeof(XFS_EFI_MAX_FAST_EXTENTS), 0, 0, NULL); if (!xfs_efi_cache) goto out_destroy_efd_cache; xfs_inode_cache = kmem_cache_create("xfs_inode", sizeof(struct xfs_inode), 0, (SLAB_HWCACHE_ALIGN | SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), xfs_fs_inode_init_once); if (!xfs_inode_cache) goto out_destroy_efi_cache; xfs_ili_cache = kmem_cache_create("xfs_ili", sizeof(struct xfs_inode_log_item), 0, SLAB_RECLAIM_ACCOUNT, NULL); if (!xfs_ili_cache) goto out_destroy_inode_cache; xfs_icreate_cache = kmem_cache_create("xfs_icr", sizeof(struct xfs_icreate_item), 0, 0, NULL); if (!xfs_icreate_cache) goto out_destroy_ili_cache; xfs_rud_cache = kmem_cache_create("xfs_rud_item", sizeof(struct xfs_rud_log_item), 0, 0, NULL); if (!xfs_rud_cache) goto out_destroy_icreate_cache; xfs_rui_cache = kmem_cache_create("xfs_rui_item", xfs_rui_log_item_sizeof(XFS_RUI_MAX_FAST_EXTENTS), 0, 0, NULL); if (!xfs_rui_cache) goto out_destroy_rud_cache; xfs_cud_cache = kmem_cache_create("xfs_cud_item", sizeof(struct xfs_cud_log_item), 0, 0, NULL); if (!xfs_cud_cache) goto out_destroy_rui_cache; xfs_cui_cache = kmem_cache_create("xfs_cui_item", xfs_cui_log_item_sizeof(XFS_CUI_MAX_FAST_EXTENTS), 0, 0, NULL); if (!xfs_cui_cache) goto out_destroy_cud_cache; xfs_bud_cache = kmem_cache_create("xfs_bud_item", sizeof(struct xfs_bud_log_item), 0, 0, NULL); if (!xfs_bud_cache) goto out_destroy_cui_cache; xfs_bui_cache = kmem_cache_create("xfs_bui_item", xfs_bui_log_item_sizeof(XFS_BUI_MAX_FAST_EXTENTS), 0, 0, NULL); if (!xfs_bui_cache) goto out_destroy_bud_cache; xfs_attrd_cache = kmem_cache_create("xfs_attrd_item", sizeof(struct xfs_attrd_log_item), 0, 0, NULL); if (!xfs_attrd_cache) goto out_destroy_bui_cache; xfs_attri_cache = kmem_cache_create("xfs_attri_item", sizeof(struct xfs_attri_log_item), 0, 0, NULL); if (!xfs_attri_cache) goto out_destroy_attrd_cache; xfs_iunlink_cache = kmem_cache_create("xfs_iul_item", sizeof(struct xfs_iunlink_item), 0, 0, NULL); if (!xfs_iunlink_cache) goto out_destroy_attri_cache; xfs_xmd_cache = kmem_cache_create("xfs_xmd_item", sizeof(struct xfs_xmd_log_item), 0, 0, NULL); if (!xfs_xmd_cache) goto out_destroy_iul_cache; xfs_xmi_cache = kmem_cache_create("xfs_xmi_item", sizeof(struct xfs_xmi_log_item), 0, 0, NULL); if (!xfs_xmi_cache) goto out_destroy_xmd_cache; xfs_parent_args_cache = kmem_cache_create("xfs_parent_args", sizeof(struct xfs_parent_args), 0, 0, NULL); if (!xfs_parent_args_cache) goto out_destroy_xmi_cache; return 0; out_destroy_xmi_cache: kmem_cache_destroy(xfs_xmi_cache); out_destroy_xmd_cache: kmem_cache_destroy(xfs_xmd_cache); out_destroy_iul_cache: kmem_cache_destroy(xfs_iunlink_cache); out_destroy_attri_cache: kmem_cache_destroy(xfs_attri_cache); out_destroy_attrd_cache: kmem_cache_destroy(xfs_attrd_cache); out_destroy_bui_cache: kmem_cache_destroy(xfs_bui_cache); out_destroy_bud_cache: kmem_cache_destroy(xfs_bud_cache); out_destroy_cui_cache: kmem_cache_destroy(xfs_cui_cache); out_destroy_cud_cache: kmem_cache_destroy(xfs_cud_cache); out_destroy_rui_cache: kmem_cache_destroy(xfs_rui_cache); out_destroy_rud_cache: kmem_cache_destroy(xfs_rud_cache); out_destroy_icreate_cache: kmem_cache_destroy(xfs_icreate_cache); out_destroy_ili_cache: kmem_cache_destroy(xfs_ili_cache); out_destroy_inode_cache: kmem_cache_destroy(xfs_inode_cache); out_destroy_efi_cache: kmem_cache_destroy(xfs_efi_cache); out_destroy_efd_cache: kmem_cache_destroy(xfs_efd_cache); out_destroy_buf_item_cache: kmem_cache_destroy(xfs_buf_item_cache); out_destroy_trans_cache: kmem_cache_destroy(xfs_trans_cache); out_destroy_ifork_cache: kmem_cache_destroy(xfs_ifork_cache); out_destroy_da_state_cache: kmem_cache_destroy(xfs_da_state_cache); out_destroy_defer_item_cache: xfs_defer_destroy_item_caches(); out_destroy_rcbagbt_cur_cache: rcbagbt_destroy_cur_cache(); out_destroy_btree_cur_cache: xfs_btree_destroy_cur_caches(); out_destroy_log_ticket_cache: kmem_cache_destroy(xfs_log_ticket_cache); out_destroy_buf_cache: kmem_cache_destroy(xfs_buf_cache); out: return -ENOMEM; } STATIC void xfs_destroy_caches(void) { /* * Make sure all delayed rcu free are flushed before we * destroy caches. */ rcu_barrier(); kmem_cache_destroy(xfs_parent_args_cache); kmem_cache_destroy(xfs_xmd_cache); kmem_cache_destroy(xfs_xmi_cache); kmem_cache_destroy(xfs_iunlink_cache); kmem_cache_destroy(xfs_attri_cache); kmem_cache_destroy(xfs_attrd_cache); kmem_cache_destroy(xfs_bui_cache); kmem_cache_destroy(xfs_bud_cache); kmem_cache_destroy(xfs_cui_cache); kmem_cache_destroy(xfs_cud_cache); kmem_cache_destroy(xfs_rui_cache); kmem_cache_destroy(xfs_rud_cache); kmem_cache_destroy(xfs_icreate_cache); kmem_cache_destroy(xfs_ili_cache); kmem_cache_destroy(xfs_inode_cache); kmem_cache_destroy(xfs_efi_cache); kmem_cache_destroy(xfs_efd_cache); kmem_cache_destroy(xfs_buf_item_cache); kmem_cache_destroy(xfs_trans_cache); kmem_cache_destroy(xfs_ifork_cache); kmem_cache_destroy(xfs_da_state_cache); xfs_defer_destroy_item_caches(); rcbagbt_destroy_cur_cache(); xfs_btree_destroy_cur_caches(); kmem_cache_destroy(xfs_log_ticket_cache); kmem_cache_destroy(xfs_buf_cache); } 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", XFS_WQFLAGS(WQ_MEM_RECLAIM | WQ_FREEZABLE), 0); if (!xfs_alloc_wq) return -ENOMEM; xfs_discard_wq = alloc_workqueue("xfsdiscard", XFS_WQFLAGS(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(); error = xfs_dahash_test(); if (error) return error; printk(KERN_INFO XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n"); xfs_dir_startup(); error = xfs_init_caches(); if (error) goto out; error = xfs_init_workqueues(); if (error) goto out_destroy_caches; error = xfs_mru_cache_init(); if (error) goto out_destroy_wq; error = xfs_init_procfs(); if (error) goto out_mru_cache_uninit; error = xfs_sysctl_register(); if (error) goto out_cleanup_procfs; xfs_debugfs = xfs_debugfs_mkdir("xfs", NULL); xfs_kset = kset_create_and_add("xfs", NULL, fs_kobj); if (!xfs_kset) { error = -ENOMEM; goto out_debugfs_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; error = xchk_global_stats_setup(xfs_debugfs); if (error) goto out_remove_stats_kobj; #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_scrub_stats; #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_scrub_stats: #endif xchk_global_stats_teardown(); out_remove_stats_kobj: xfs_sysfs_del(&xfsstats.xs_kobj); out_free_stats: free_percpu(xfsstats.xs_stats); out_kset_unregister: kset_unregister(xfs_kset); out_debugfs_unregister: debugfs_remove(xfs_debugfs); xfs_sysctl_unregister(); out_cleanup_procfs: xfs_cleanup_procfs(); out_mru_cache_uninit: xfs_mru_cache_uninit(); out_destroy_wq: xfs_destroy_workqueues(); out_destroy_caches: xfs_destroy_caches(); 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 xchk_global_stats_teardown(); xfs_sysfs_del(&xfsstats.xs_kobj); free_percpu(xfsstats.xs_stats); kset_unregister(xfs_kset); debugfs_remove(xfs_debugfs); xfs_sysctl_unregister(); xfs_cleanup_procfs(); xfs_mru_cache_uninit(); xfs_destroy_workqueues(); xfs_destroy_caches(); 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");
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