diff options
Diffstat (limited to 'fs/xfs/linux-2.6')
| -rw-r--r-- | fs/xfs/linux-2.6/kmem.c | 56 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/kmem.h | 21 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_acl.c | 11 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.c | 320 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_buf.h | 52 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_fs_subr.c | 2 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_ioctl.c | 21 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_ioctl.h | 12 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_ioctl32.c | 4 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_iops.c | 4 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_lrw.c | 62 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_lrw.h | 3 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_super.c | 169 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_sync.c | 186 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_sync.h | 1 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_trace.h | 81 | ||||
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_xattr.c | 27 |
17 files changed, 727 insertions, 305 deletions
diff --git a/fs/xfs/linux-2.6/kmem.c b/fs/xfs/linux-2.6/kmem.c index 2d3f90afe5f1..bc7405585def 100644 --- a/fs/xfs/linux-2.6/kmem.c +++ b/fs/xfs/linux-2.6/kmem.c @@ -16,7 +16,6 @@ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include <linux/mm.h> -#include <linux/vmalloc.h> #include <linux/highmem.h> #include <linux/swap.h> #include <linux/blkdev.h> @@ -24,8 +23,25 @@ #include "time.h" #include "kmem.h" -#define MAX_VMALLOCS 6 -#define MAX_SLAB_SIZE 0x20000 +/* + * Greedy allocation. May fail and may return vmalloced memory. + * + * Must be freed using kmem_free_large. + */ +void * +kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize) +{ + void *ptr; + size_t kmsize = maxsize; + + while (!(ptr = kmem_zalloc_large(kmsize))) { + if ((kmsize >>= 1) <= minsize) + kmsize = minsize; + } + if (ptr) + *size = kmsize; + return ptr; +} void * kmem_alloc(size_t size, unsigned int __nocast flags) @@ -34,19 +50,8 @@ kmem_alloc(size_t size, unsigned int __nocast flags) gfp_t lflags = kmem_flags_convert(flags); void *ptr; -#ifdef DEBUG - if (unlikely(!(flags & KM_LARGE) && (size > PAGE_SIZE))) { - printk(KERN_WARNING "Large %s attempt, size=%ld\n", - __func__, (long)size); - dump_stack(); - } -#endif - do { - if (size < MAX_SLAB_SIZE || retries > MAX_VMALLOCS) - ptr = kmalloc(size, lflags); - else - ptr = __vmalloc(size, lflags, PAGE_KERNEL); + ptr = kmalloc(size, lflags); if (ptr || (flags & (KM_MAYFAIL|KM_NOSLEEP))) return ptr; if (!(++retries % 100)) @@ -68,27 +73,6 @@ kmem_zalloc(size_t size, unsigned int __nocast flags) return ptr; } -void * -kmem_zalloc_greedy(size_t *size, size_t minsize, size_t maxsize, - unsigned int __nocast flags) -{ - void *ptr; - size_t kmsize = maxsize; - unsigned int kmflags = (flags & ~KM_SLEEP) | KM_NOSLEEP; - - while (!(ptr = kmem_zalloc(kmsize, kmflags))) { - if ((kmsize <= minsize) && (flags & KM_NOSLEEP)) - break; - if ((kmsize >>= 1) <= minsize) { - kmsize = minsize; - kmflags = flags; - } - } - if (ptr) - *size = kmsize; - return ptr; -} - void kmem_free(const void *ptr) { diff --git a/fs/xfs/linux-2.6/kmem.h b/fs/xfs/linux-2.6/kmem.h index 179cbd630f69..f7c8f7a9ea6d 100644 --- a/fs/xfs/linux-2.6/kmem.h +++ b/fs/xfs/linux-2.6/kmem.h @@ -21,6 +21,7 @@ #include <linux/slab.h> #include <linux/sched.h> #include <linux/mm.h> +#include <linux/vmalloc.h> /* * General memory allocation interfaces @@ -30,7 +31,6 @@ #define KM_NOSLEEP 0x0002u #define KM_NOFS 0x0004u #define KM_MAYFAIL 0x0008u -#define KM_LARGE 0x0010u /* * We use a special process flag to avoid recursive callbacks into @@ -42,7 +42,7 @@ kmem_flags_convert(unsigned int __nocast flags) { gfp_t lflags; - BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL|KM_LARGE)); + BUG_ON(flags & ~(KM_SLEEP|KM_NOSLEEP|KM_NOFS|KM_MAYFAIL)); if (flags & KM_NOSLEEP) { lflags = GFP_ATOMIC | __GFP_NOWARN; @@ -56,10 +56,25 @@ kmem_flags_convert(unsigned int __nocast flags) extern void *kmem_alloc(size_t, unsigned int __nocast); extern void *kmem_zalloc(size_t, unsigned int __nocast); -extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast); extern void *kmem_realloc(const void *, size_t, size_t, unsigned int __nocast); extern void kmem_free(const void *); +static inline void *kmem_zalloc_large(size_t size) +{ + void *ptr; + + ptr = vmalloc(size); + if (ptr) + memset(ptr, 0, size); + return ptr; +} +static inline void kmem_free_large(void *ptr) +{ + vfree(ptr); +} + +extern void *kmem_zalloc_greedy(size_t *, size_t, size_t); + /* * Zone interfaces */ diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c index 883ca5ab8af5..bf85bbe4a9ae 100644 --- a/fs/xfs/linux-2.6/xfs_acl.c +++ b/fs/xfs/linux-2.6/xfs_acl.c @@ -106,7 +106,7 @@ xfs_get_acl(struct inode *inode, int type) struct posix_acl *acl; struct xfs_acl *xfs_acl; int len = sizeof(struct xfs_acl); - char *ea_name; + unsigned char *ea_name; int error; acl = get_cached_acl(inode, type); @@ -133,7 +133,8 @@ xfs_get_acl(struct inode *inode, int type) if (!xfs_acl) return ERR_PTR(-ENOMEM); - error = -xfs_attr_get(ip, ea_name, (char *)xfs_acl, &len, ATTR_ROOT); + error = -xfs_attr_get(ip, ea_name, (unsigned char *)xfs_acl, + &len, ATTR_ROOT); if (error) { /* * If the attribute doesn't exist make sure we have a negative @@ -162,7 +163,7 @@ STATIC int xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) { struct xfs_inode *ip = XFS_I(inode); - char *ea_name; + unsigned char *ea_name; int error; if (S_ISLNK(inode->i_mode)) @@ -194,7 +195,7 @@ xfs_set_acl(struct inode *inode, int type, struct posix_acl *acl) (sizeof(struct xfs_acl_entry) * (XFS_ACL_MAX_ENTRIES - acl->a_count)); - error = -xfs_attr_set(ip, ea_name, (char *)xfs_acl, + error = -xfs_attr_set(ip, ea_name, (unsigned char *)xfs_acl, len, ATTR_ROOT); kfree(xfs_acl); @@ -262,7 +263,7 @@ xfs_set_mode(struct inode *inode, mode_t mode) } static int -xfs_acl_exists(struct inode *inode, char *name) +xfs_acl_exists(struct inode *inode, unsigned char *name) { int len = sizeof(struct xfs_acl); diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 77b8be81c769..6f76ba85f193 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -33,6 +33,7 @@ #include <linux/migrate.h> #include <linux/backing-dev.h> #include <linux/freezer.h> +#include <linux/list_sort.h> #include "xfs_sb.h" #include "xfs_inum.h" @@ -76,6 +77,27 @@ struct workqueue_struct *xfsconvertd_workqueue; #define xfs_buf_deallocate(bp) \ kmem_zone_free(xfs_buf_zone, (bp)); +static inline int +xfs_buf_is_vmapped( + struct xfs_buf *bp) +{ + /* + * Return true if the buffer is vmapped. + * + * The XBF_MAPPED flag is set if the buffer should be mapped, but the + * code is clever enough to know it doesn't have to map a single page, + * so the check has to be both for XBF_MAPPED and bp->b_page_count > 1. + */ + return (bp->b_flags & XBF_MAPPED) && bp->b_page_count > 1; +} + +static inline int +xfs_buf_vmap_len( + struct xfs_buf *bp) +{ + return (bp->b_page_count * PAGE_SIZE) - bp->b_offset; +} + /* * Page Region interfaces. * @@ -314,7 +336,7 @@ xfs_buf_free( if (bp->b_flags & (_XBF_PAGE_CACHE|_XBF_PAGES)) { uint i; - if ((bp->b_flags & XBF_MAPPED) && (bp->b_page_count > 1)) + if (xfs_buf_is_vmapped(bp)) free_address(bp->b_addr - bp->b_offset); for (i = 0; i < bp->b_page_count; i++) { @@ -1051,22 +1073,30 @@ xfs_buf_ioerror( } int -xfs_bawrite( - void *mp, +xfs_bwrite( + struct xfs_mount *mp, struct xfs_buf *bp) { - trace_xfs_buf_bawrite(bp, _RET_IP_); + int iowait = (bp->b_flags & XBF_ASYNC) == 0; + int error = 0; - ASSERT(bp->b_bn != XFS_BUF_DADDR_NULL); + bp->b_strat = xfs_bdstrat_cb; + bp->b_mount = mp; + bp->b_flags |= XBF_WRITE; + if (!iowait) + bp->b_flags |= _XBF_RUN_QUEUES; xfs_buf_delwri_dequeue(bp); + xfs_buf_iostrategy(bp); - bp->b_flags &= ~(XBF_READ | XBF_DELWRI | XBF_READ_AHEAD); - bp->b_flags |= (XBF_WRITE | XBF_ASYNC | _XBF_RUN_QUEUES); + if (iowait) { + error = xfs_buf_iowait(bp); + if (error) + xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); + xfs_buf_relse(bp); + } - bp->b_mount = mp; - bp->b_strat = xfs_bdstrat_cb; - return xfs_bdstrat_cb(bp); + return error; } void @@ -1085,6 +1115,126 @@ xfs_bdwrite( xfs_buf_delwri_queue(bp, 1); } +/* + * Called when we want to stop a buffer from getting written or read. + * We attach the EIO error, muck with its flags, and call biodone + * so that the proper iodone callbacks get called. + */ +STATIC int +xfs_bioerror( + xfs_buf_t *bp) +{ +#ifdef XFSERRORDEBUG + ASSERT(XFS_BUF_ISREAD(bp) || bp->b_iodone); +#endif + + /* + * No need to wait until the buffer is unpinned, we aren't flushing it. + */ + XFS_BUF_ERROR(bp, EIO); + + /* + * We're calling biodone, so delete XBF_DONE flag. + */ + XFS_BUF_UNREAD(bp); + XFS_BUF_UNDELAYWRITE(bp); + XFS_BUF_UNDONE(bp); + XFS_BUF_STALE(bp); + + XFS_BUF_CLR_BDSTRAT_FUNC(bp); + xfs_biodone(bp); + + return EIO; +} + +/* + * Same as xfs_bioerror, except that we are releasing the buffer + * here ourselves, and avoiding the biodone call. + * This is meant for userdata errors; metadata bufs come with + * iodone functions attached, so that we can track down errors. + */ +STATIC int +xfs_bioerror_relse( + struct xfs_buf *bp) +{ + int64_t fl = XFS_BUF_BFLAGS(bp); + /* + * No need to wait until the buffer is unpinned. + * We aren't flushing it. + * + * chunkhold expects B_DONE to be set, whether + * we actually finish the I/O or not. We don't want to + * change that interface. + */ + XFS_BUF_UNREAD(bp); + XFS_BUF_UNDELAYWRITE(bp); + XFS_BUF_DONE(bp); + XFS_BUF_STALE(bp); + XFS_BUF_CLR_IODONE_FUNC(bp); + XFS_BUF_CLR_BDSTRAT_FUNC(bp); + if (!(fl & XBF_ASYNC)) { + /* + * Mark b_error and B_ERROR _both_. + * Lot's of chunkcache code assumes that. + * There's no reason to mark error for + * ASYNC buffers. + */ + XFS_BUF_ERROR(bp, EIO); + XFS_BUF_FINISH_IOWAIT(bp); + } else { + xfs_buf_relse(bp); + } + + return EIO; +} + + +/* + * All xfs metadata buffers except log state machine buffers + * get this attached as their b_bdstrat callback function. + * This is so that we can catch a buffer + * after prematurely unpinning it to forcibly shutdown the filesystem. + */ +int +xfs_bdstrat_cb( + struct xfs_buf *bp) +{ + if (XFS_FORCED_SHUTDOWN(bp->b_mount)) { + trace_xfs_bdstrat_shut(bp, _RET_IP_); + /* + * Metadata write that didn't get logged but + * written delayed anyway. These aren't associated + * with a transaction, and can be ignored. + */ + if (!bp->b_iodone && !XFS_BUF_ISREAD(bp)) + return xfs_bioerror_relse(bp); + else + return xfs_bioerror(bp); + } + + xfs_buf_iorequest(bp); + return 0; +} + +/* + * Wrapper around bdstrat so that we can stop data from going to disk in case + * we are shutting down the filesystem. Typically user data goes thru this + * path; one of the exceptions is the superblock. + */ +void +xfsbdstrat( + struct xfs_mount *mp, + struct xfs_buf *bp) +{ + if (XFS_FORCED_SHUTDOWN(mp)) { + trace_xfs_bdstrat_shut(bp, _RET_IP_); + xfs_bioerror_relse(bp); + return; + } + + xfs_buf_iorequest(bp); +} + STATIC void _xfs_buf_ioend( xfs_buf_t *bp, @@ -1107,6 +1257,9 @@ xfs_buf_bio_end_io( xfs_buf_ioerror(bp, -error); + if (!error && xfs_buf_is_vmapped(bp) && (bp->b_flags & XBF_READ)) + invalidate_kernel_vmap_range(bp->b_addr, xfs_buf_vmap_len(bp)); + do { struct page *page = bvec->bv_page; @@ -1216,6 +1369,10 @@ next_chunk: submit_io: if (likely(bio->bi_size)) { + if (xfs_buf_is_vmapped(bp)) { + flush_kernel_vmap_range(bp->b_addr, + xfs_buf_vmap_len(bp)); + } submit_bio(rw, bio); if (size) goto next_chunk; @@ -1296,7 +1453,7 @@ xfs_buf_iomove( xfs_buf_t *bp, /* buffer to process */ size_t boff, /* starting buffer offset */ size_t bsize, /* length to copy */ - caddr_t data, /* data address */ + void *data, /* data address */ xfs_buf_rw_t mode) /* read/write/zero flag */ { size_t bend, cpoff, csize; @@ -1378,8 +1535,8 @@ xfs_alloc_bufhash( btp->bt_hashshift = external ? 3 : 8; /* 8 or 256 buckets */ btp->bt_hashmask = (1 << btp->bt_hashshift) - 1; - btp->bt_hash = kmem_zalloc((1 << btp->bt_hashshift) * - sizeof(xfs_bufhash_t), KM_SLEEP | KM_LARGE); + btp->bt_hash = kmem_zalloc_large((1 << btp->bt_hashshift) * + sizeof(xfs_bufhash_t)); for (i = 0; i < (1 << btp->bt_hashshift); i++) { spin_lock_init(&btp->bt_hash[i].bh_lock); INIT_LIST_HEAD(&btp->bt_hash[i].bh_list); @@ -1390,7 +1547,7 @@ STATIC void xfs_free_bufhash( xfs_buftarg_t *btp) { - kmem_free(btp->bt_hash); + kmem_free_large(btp->bt_hash); btp->bt_hash = NULL; } @@ -1595,6 +1752,11 @@ xfs_buf_delwri_queue( list_del(&bp->b_list); } + if (list_empty(dwq)) { + /* start xfsbufd as it is about to have something to do */ + wake_up_process(bp->b_target->bt_task); + } + bp->b_flags |= _XBF_DELWRI_Q; list_add_tail(&bp->b_list, dwq); bp->b_queuetime = jiffies; @@ -1626,6 +1788,35 @@ xfs_buf_delwri_dequeue( trace_xfs_buf_delwri_dequeue(bp, _RET_IP_); } +/* + * If a delwri buffer needs to be pushed before it has aged out, then promote + * it to the head of the delwri queue so that it will be flushed on the next + * xfsbufd run. We do this by resetting the queuetime of the buffer to be older + * than the age currently needed to flush the buffer. Hence the next time the + * xfsbufd sees it is guaranteed to be considered old enough to flush. + */ +void +xfs_buf_delwri_promote( + struct xfs_buf *bp) +{ + struct xfs_buftarg *btp = bp->b_target; + long age = xfs_buf_age_centisecs * msecs_to_jiffies(10) + 1; + + ASSERT(bp->b_flags & XBF_DELWRI); + ASSERT(bp->b_flags & _XBF_DELWRI_Q); + + /* + * Check the buffer age before locking the delayed write queue as we + * don't need to promote buffers that are already past the flush age. + */ + if (bp->b_queuetime < jiffies - age) + return; + bp->b_queuetime = jiffies - age; + spin_lock(&btp->bt_delwrite_lock); + list_move(&bp->b_list, &btp->bt_delwrite_queue); + spin_unlock(&btp->bt_delwrite_lock); +} + STATIC void xfs_buf_runall_queues( struct workqueue_struct *queue) @@ -1644,6 +1835,8 @@ xfsbufd_wakeup( list_for_each_entry(btp, &xfs_buftarg_list, bt_list) { if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags)) continue; + if (list_empty(&btp->bt_delwrite_queue)) + continue; set_bit(XBT_FORCE_FLUSH, &btp->bt_flags); wake_up_process(btp->bt_task); } @@ -1694,20 +1887,53 @@ xfs_buf_delwri_split( } +/* + * Compare function is more complex than it needs to be because + * the return value is only 32 bits and we are doing comparisons + * on 64 bit values + */ +static int +xfs_buf_cmp( + void *priv, + struct list_head *a, + struct list_head *b) +{ + struct xfs_buf *ap = container_of(a, struct xfs_buf, b_list); + struct xfs_buf *bp = container_of(b, struct xfs_buf, b_list); + xfs_daddr_t diff; + + diff = ap->b_bn - bp->b_bn; + if (diff < 0) + return -1; + if (diff > 0) + return 1; + return 0; +} + +void +xfs_buf_delwri_sort( + xfs_buftarg_t *target, + struct list_head *list) +{ + list_sort(NULL, list, xfs_buf_cmp); +} + STATIC int xfsbufd( void *data) { - struct list_head tmp; - xfs_buftarg_t *target = (xfs_buftarg_t *)data; - int count; - xfs_buf_t *bp; + xfs_buftarg_t *target = (xfs_buftarg_t *)data; current->flags |= PF_MEMALLOC; set_freezable(); do { + long age = xfs_buf_age_centisecs * msecs_to_jiffies(10); + long tout = xfs_buf_timer_centisecs * msecs_to_jiffies(10); + int count = 0; + struct list_head tmp; + if (unlikely(freezing(current))) { set_bit(XBT_FORCE_SLEEP, &target->bt_flags); refrigerator(); @@ -1715,17 +1941,16 @@ xfsbufd( clear_bit(XBT_FORCE_SLEEP, &target->bt_flags); } - schedule_timeout_interruptible( - xfs_buf_timer_centisecs * msecs_to_jiffies(10)); + /* sleep for a long time if there is nothing to do. */ + if (list_empty(&target->bt_delwrite_queue)) + tout = MAX_SCHEDULE_TIMEOUT; + schedule_timeout_interruptible(tout); - xfs_buf_delwri_split(target, &tmp, - xfs_buf_age_centisecs * msecs_to_jiffies(10)); - - count = 0; + xfs_buf_delwri_split(target, &tmp, age); + list_sort(NULL, &tmp, xfs_buf_cmp); while (!list_empty(&tmp)) { - bp = list_entry(tmp.next, xfs_buf_t, b_list); - ASSERT(target == bp->b_target); - + struct xfs_buf *bp; + bp = list_first_entry(&tmp, struct xfs_buf, b_list); list_del_init(&bp->b_list); xfs_buf_iostrategy(bp); count++; @@ -1751,42 +1976,45 @@ xfs_flush_buftarg( xfs_buftarg_t *target, int wait) { - struct list_head tmp; - xfs_buf_t *bp, *n; + xfs_buf_t *bp; int pincount = 0; + LIST_HEAD(tmp_list); + LIST_HEAD(wait_list); xfs_buf_runall_queues(xfsconvertd_workqueue); xfs_buf_runall_queues(xfsdatad_workqueue); xfs_buf_runall_queues(xfslogd_workqueue); set_bit(XBT_FORCE_FLUSH, &target->bt_flags); - pincount = xfs_buf_delwri_split(target, &tmp, 0); + pincount = xfs_buf_delwri_split(target, &tmp_list, 0); /* - * Dropped the delayed write list lock, now walk the temporary list + * Dropped the delayed write list lock, now walk the temporary list. + * All I/O is issued async and then if we need to wait for completion + * we do that after issuing all the IO. */ - list_for_each_entry_safe(bp, n, &tmp, b_list) { + list_sort(NULL, &tmp_list, xfs_buf_cmp); + while (!list_empty(&tmp_list)) { + bp = list_first_entry(&tmp_list, struct xfs_buf, b_list); ASSERT(target == bp->b_target); - if (wait) + list_del_init(&bp->b_list); + if (wait) { bp->b_flags &= ~XBF_ASYNC; - else - list_del_init(&bp->b_list); - + list_add(&bp->b_list, &wait_list); + } xfs_buf_iostrategy(bp); } - if (wait) + if (wait) { + /* Expedite and wait for IO to complete. */ blk_run_address_space(target->bt_mapping); + while (!list_empty(&wait_list)) { + bp = list_first_entry(&wait_list, struct xfs_buf, b_list); - /* - * Remaining list items must be flushed before returning - */ - while (!list_empty(&tmp)) { - bp = list_entry(tmp.next, xfs_buf_t, b_list); - - list_del_init(&bp->b_list); - xfs_iowait(bp); - xfs_buf_relse(bp); + list_del_init(&bp->b_list); + xfs_iowait(bp); + xfs_buf_relse(bp); + } } return pincount; diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index a34c7b54822d..386e7361e50e 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -232,13 +232,17 @@ extern void xfs_buf_lock(xfs_buf_t *); extern void xfs_buf_unlock(xfs_buf_t *); /* Buffer Read and Write Routines */ -extern int xfs_bawrite(void *mp, xfs_buf_t *bp); +extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp); extern void xfs_bdwrite(void *mp, xfs_buf_t *bp); + +extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *); +extern int xfs_bdstrat_cb(struct xfs_buf *); + extern void xfs_buf_ioend(xfs_buf_t *, int); extern void xfs_buf_ioerror(xfs_buf_t *, int); extern int xfs_buf_iorequest(xfs_buf_t *); extern int xfs_buf_iowait(xfs_buf_t *); -extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, xfs_caddr_t, +extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *, xfs_buf_rw_t); static inline int xfs_buf_iostrategy(xfs_buf_t *bp) @@ -261,6 +265,7 @@ extern int xfs_buf_ispin(xfs_buf_t *); /* Delayed Write Buffer Routines */ extern void xfs_buf_delwri_dequeue(xfs_buf_t *); +extern void xfs_buf_delwri_promote(xfs_buf_t *); /* Buffer Daemon Setup Routines */ extern int xfs_buf_init(void); @@ -270,33 +275,19 @@ extern void xfs_buf_terminate(void); ({ char __b[BDEVNAME_SIZE]; bdevname((target)->bt_bdev, __b); __b; }) -#define XFS_B_ASYNC XBF_ASYNC -#define XFS_B_DELWRI XBF_DELWRI -#define XFS_B_READ XBF_READ -#define XFS_B_WRITE XBF_WRITE -#define XFS_B_STALE XBF_STALE - -#define XFS_BUF_TRYLOCK XBF_TRYLOCK -#define XFS_INCORE_TRYLOCK XBF_TRYLOCK -#define XFS_BUF_LOCK XBF_LOCK -#define XFS_BUF_MAPPED XBF_MAPPED - -#define BUF_BUSY XBF_DONT_BLOCK - #define XFS_BUF_BFLAGS(bp) ((bp)->b_flags) #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) -#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XFS_B_STALE) -#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XFS_B_STALE) -#define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XFS_B_STALE) +#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE) +#define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) +#define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) #define XFS_BUF_SUPER_STALE(bp) do { \ XFS_BUF_STALE(bp); \ xfs_buf_delwri_dequeue(bp); \ XFS_BUF_DONE(bp); \ } while (0) -#define XFS_BUF_MANAGE XBF_FS_MANAGED #define XFS_BUF_UNMANAGE(bp) ((bp)->b_flags &= ~XBF_FS_MANAGED) #define XFS_BUF_DELAYWRITE(bp) ((bp)->b_flags |= XBF_DELWRI) @@ -385,31 +376,11 @@ static inline void xfs_buf_relse(xfs_buf_t *bp) #define xfs_biomove(bp, off, len, data, rw) \ xfs_buf_iomove((bp), (off), (len), (data), \ - ((rw) == XFS_B_WRITE) ? XBRW_WRITE : XBRW_READ) + ((rw) == XBF_WRITE) ? XBRW_WRITE : XBRW_READ) #define xfs_biozero(bp, off, len) \ xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO) - -static inline int XFS_bwrite(xfs_buf_t *bp) -{ - int iowait = (bp->b_flags & XBF_ASYNC) == 0; - int error = 0; - - if (!iowait) - bp->b_flags |= _XBF_RUN_QUEUES; - - xfs_buf_delwri_dequeue(bp); - xfs_buf_iostrategy(bp); - if (iowait) { - error = xfs_buf_iowait(bp); - xfs_buf_relse(bp); - } - return error; -} - -#define XFS_bdstrat(bp) xfs_buf_iorequest(bp) - #define xfs_iowait(bp) xfs_buf_iowait(bp) #define xfs_baread(target, rablkno, ralen) \ @@ -424,6 +395,7 @@ extern void xfs_free_buftarg(struct xfs_mount *, struct xfs_buftarg *); extern void xfs_wait_buftarg(xfs_buftarg_t *); extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int, unsigned int); extern int xfs_flush_buftarg(xfs_buftarg_t *, int); + #ifdef CONFIG_KDB_MODULES extern struct list_head *xfs_get_buftarg_list(void); #endif diff --git a/fs/xfs/linux-2.6/xfs_fs_subr.c b/fs/xfs/linux-2.6/xfs_fs_subr.c index 7501b85fd860..b6918d76bc7b 100644 --- a/fs/xfs/linux-2.6/xfs_fs_subr.c +++ b/fs/xfs/linux-2.6/xfs_fs_subr.c @@ -79,7 +79,7 @@ xfs_flush_pages( xfs_iflags_clear(ip, XFS_ITRUNCATED); ret = -filemap_fdatawrite(mapping); } - if (flags & XFS_B_ASYNC) + if (flags & XBF_ASYNC) return ret; ret2 = xfs_wait_on_pages(ip, first, last); if (!ret) diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c index a034cf624437..4ea1ee18aded 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.c +++ b/fs/xfs/linux-2.6/xfs_ioctl.c @@ -447,12 +447,12 @@ xfs_attrlist_by_handle( int xfs_attrmulti_attr_get( struct inode *inode, - char *name, - char __user *ubuf, + unsigned char *name, + unsigned char __user *ubuf, __uint32_t *len, __uint32_t flags) { - char *kbuf; + unsigned char *kbuf; int error = EFAULT; if (*len > XATTR_SIZE_MAX) @@ -476,12 +476,12 @@ xfs_attrmulti_attr_get( int xfs_attrmulti_attr_set( struct inode *inode, - char *name, - const char __user *ubuf, + unsigned char *name, + const unsigned char __user *ubuf, __uint32_t len, __uint32_t flags) { - char *kbuf; + unsigned char *kbuf; int error = EFAULT; if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) @@ -501,7 +501,7 @@ xfs_attrmulti_attr_set( int xfs_attrmulti_attr_remove( struct inode *inode, - char *name, + unsigned char *name, __uint32_t flags) { if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) @@ -519,7 +519,7 @@ xfs_attrmulti_by_handle( xfs_fsop_attrmulti_handlereq_t am_hreq; struct dentry *dentry; unsigned int i, size; - char *attr_name; + unsigned char *attr_name; if (!capable(CAP_SYS_ADMIN)) return -XFS_ERROR(EPERM); @@ -547,7 +547,7 @@ xfs_attrmulti_by_handle( error = 0; for (i = 0; i < am_hreq.opcount; i++) { - ops[i].am_error = strncpy_from_user(attr_name, + ops[i].am_error = strncpy_from_user((char *)attr_name, ops[i].am_attrname, MAXNAMELEN); if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) error = -ERANGE; @@ -1431,6 +1431,9 @@ xfs_file_ioctl( if (!capable(CAP_SYS_ADMIN)) return -EPERM; + if (mp->m_flags & XFS_MOUNT_RDONLY) + return -XFS_ERROR(EROFS); + if (copy_from_user(&inout, arg, sizeof(inout))) return -XFS_ERROR(EFAULT); diff --git a/fs/xfs/linux-2.6/xfs_ioctl.h b/fs/xfs/linux-2.6/xfs_ioctl.h index 7bd7c6afc1eb..d56173b34a2a 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl.h +++ b/fs/xfs/linux-2.6/xfs_ioctl.h @@ -45,23 +45,23 @@ xfs_readlink_by_handle( extern int xfs_attrmulti_attr_get( struct inode *inode, - char *name, - char __user *ubuf, + unsigned char *name, + unsigned char __user *ubuf, __uint32_t *len, __uint32_t flags); extern int - xfs_attrmulti_attr_set( +xfs_attrmulti_attr_set( struct inode *inode, - char *name, - const char __user *ubuf, + unsigned char *name, + const unsigned char __user *ubuf, __uint32_t len, __uint32_t flags); extern int xfs_attrmulti_attr_remove( struct inode *inode, - char *name, + unsigned char *name, __uint32_t flags); extern struct dentry * diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c index be1527b1670c..0bf6d61f0528 100644 --- a/fs/xfs/linux-2.6/xfs_ioctl32.c +++ b/fs/xfs/linux-2.6/xfs_ioctl32.c @@ -411,7 +411,7 @@ xfs_compat_attrmulti_by_handle( compat_xfs_fsop_attrmulti_handlereq_t am_hreq; struct dentry *dentry; unsigned int i, size; - char *attr_name; + unsigned char *attr_name; if (!capable(CAP_SYS_ADMIN)) return -XFS_ERROR(EPERM); @@ -440,7 +440,7 @@ xfs_compat_attrmulti_by_handle( error = 0; for (i = 0; i < am_hreq.opcount; i++) { - ops[i].am_error = strncpy_from_user(attr_name, + ops[i].am_error = strncpy_from_user((char *)attr_name, compat_ptr(ops[i].am_attrname), MAXNAMELEN); if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 225946012d0b..e8566bbf0f00 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -140,10 +140,10 @@ xfs_init_security( struct xfs_inode *ip = XFS_I(inode); size_t length; void *value; - char *name; + unsigned char *name; int error; - error = security_inode_init_security(inode, dir, &name, + error = security_inode_init_security(inode, dir, (char **)&name, &value, &length); if (error) { if (error == -EOPNOTSUPP) diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c index 0d32457abef1..eac6f80d786d 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.c +++ b/fs/xfs/linux-2.6/xfs_lrw.c @@ -630,18 +630,9 @@ start: * by root. This keeps people from modifying setuid and * setgid binaries. */ - - if (((xip->i_d.di_mode & S_ISUID) || - ((xip->i_d.di_mode & (S_ISGID | S_IXGRP)) == - (S_ISGID | S_IXGRP))) && - !capable(CAP_FSETID)) { - error = xfs_write_clear_setuid(xip); - if (likely(!error)) - error = -file_remove_suid(file); - if (unlikely(error)) { - goto out_unlock_internal; - } - } + error = -file_remove_suid(file); + if (unlikely(error)) + goto out_unlock_internal; /* We can write back this queue in page reclaim */ current->backing_dev_info = mapping->backing_dev_info; @@ -784,53 +775,6 @@ write_retry: } /* - * All xfs metadata buffers except log state machine buffers - * get this attached as their b_bdstrat callback function. - * This is so that we can catch a buffer - * after prematurely unpinning it to forcibly shutdown the filesystem. - */ -int -xfs_bdstrat_cb(struct xfs_buf *bp) -{ - if (XFS_FORCED_SHUTDOWN(bp->b_mount)) { - trace_xfs_bdstrat_shut(bp, _RET_IP_); - /* - * Metadata write that didn't get logged but - * written delayed anyway. These aren't associated - * with a transaction, and can be ignored. - */ - if (XFS_BUF_IODONE_FUNC(bp) == NULL && - (XFS_BUF_ISREAD(bp)) == 0) - return (xfs_bioerror_relse(bp)); - else - return (xfs_bioerror(bp)); - } - - xfs_buf_iorequest(bp); - return 0; -} - -/* - * Wrapper around bdstrat so that we can stop data from going to disk in case - * we are shutting down the filesystem. Typically user data goes thru this - * path; one of the exceptions is the superblock. - */ -void -xfsbdstrat( - struct xfs_mount *mp, - struct xfs_buf *bp) -{ - ASSERT(mp); - if (!XFS_FORCED_SHUTDOWN(mp)) { - xfs_buf_iorequest(bp); - return; - } - - trace_xfs_bdstrat_shut(bp, _RET_IP_); - xfs_bioerror_relse(bp); -} - -/* * If the underlying (data/log/rt) device is readonly, there are some * operations that cannot proceed. */ diff --git a/fs/xfs/linux-2.6/xfs_lrw.h b/fs/xfs/linux-2.6/xfs_lrw.h index d1f7789c7ffb..342ae8c0d011 100644 --- a/fs/xfs/linux-2.6/xfs_lrw.h +++ b/fs/xfs/linux-2.6/xfs_lrw.h @@ -22,9 +22,6 @@ struct xfs_mount; struct xfs_inode; struct xfs_buf; -/* errors from xfsbdstrat() must be extracted from the buffer */ -extern void xfsbdstrat(struct xfs_mount *, struct xfs_buf *); -extern int xfs_bdstrat_cb(struct xfs_buf *); extern int xfs_dev_is_read_only(struct xfs_mount *, char *); extern int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t); diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 77414db10dc2..25ea2408118f 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -877,12 +877,11 @@ xfsaild( { struct xfs_ail *ailp = data; xfs_lsn_t last_pushed_lsn = 0; - long tout = 0; + long tout = 0; /* milliseconds */ while (!kthread_should_stop()) { - if (tout) - schedule_timeout_interruptible(msecs_to_jiffies(tout)); - tout = 1000; + schedule_timeout_interruptible(tout ? + msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); /* swsusp */ try_to_freeze(); @@ -1022,12 +1021,45 @@ xfs_fs_dirty_inode( XFS_I(inode)->i_update_core = 1; } -/* - * Attempt to flush the inode, this will actually fail - * if the inode is pinned, but we dirty the inode again - * at the point when it is unpinned after a log write, - * since this is when the inode itself becomes flushable. - */ +STATIC int +xfs_log_inode( + struct xfs_inode *ip) +{ + struct xfs_mount *mp = ip->i_mount; + struct xfs_trans *tp; + int error; + + xfs_iunlock(ip, XFS_ILOCK_SHARED); + 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); + /* we need to return with the lock hold shared */ + xfs_ilock(ip, XFS_ILOCK_SHARED); + return error; + } + + xfs_ilock(ip, XFS_ILOCK_EXCL); + + /* + * Note - it's possible that we might have pushed ourselves out of the + * way during trans_reserve which would flush the inode. But there's + * no guarantee that the inode buffer has actually gone out yet (it's + * delwri). Plus the buffer could be pinned anyway if it's part of + * an inode in another recent transaction. So we play it safe and + * fire off the transaction anyway. + */ + xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); + xfs_trans_ihold(tp, ip); + xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); + xfs_trans_set_sync(tp); + error = xfs_trans_commit(tp, 0); + xfs_ilock_demote(ip, XFS_ILOCK_EXCL); + + return error; +} + STATIC int xfs_fs_write_inode( struct inode *inode, @@ -1035,7 +1067,7 @@ xfs_fs_write_inode( { struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; - int error = 0; + int error = EAGAIN; xfs_itrace_entry(ip); @@ -1046,35 +1078,55 @@ xfs_fs_write_inode( error = xfs_wait_on_pages(ip, 0, -1); if (error) goto out; - } - - /* - * Bypass inodes which have already been cleaned by - * the inode flush clustering code inside xfs_iflush - */ - if (xfs_inode_clean(ip)) - goto out; - /* - * We make this non-blocking if the inode is contended, return - * EAGAIN to indicate to the caller that they did not succeed. - * This prevents the flush path from blocking on inodes inside - * another operation right now, they get caught later by xfs_sync. - */ - if (sync) { + /* + * Make sure the inode has hit stable storage. By using the + * log and the fsync transactions we reduce the IOs we have + * to do here from two (log and inode) to just the log. + * + * Note: We still need to do a delwri write of the inode after + * this to flush it to the backing buffer so that bulkstat + * works properly if this is the first time the inode has been + * written. Because we hold the ilock atomically over the + * transaction commit and the inode flush we are guaranteed + * that the inode is not pinned when it returns. If the flush + * lock is already held, then the inode has already been + * flushed once and we don't need to flush it again. Hence + * the code will only flush the inode if it isn't already + * being flushed. + */ xfs_ilock(ip, XFS_ILOCK_SHARED); - xfs_iflock(ip); - - error = xfs_iflush(ip, XFS_IFLUSH_SYNC); + if (ip->i_update_core) { + error = xfs_log_inode(ip); + if (error) + goto out_unlock; + } } else { - error = EAGAIN; + /* + * We make this non-blocking if the inode is contended, return + * EAGAIN to indicate to the caller that they did not succeed. + * This prevents the flush path from blocking on inodes inside + * another operation right now, they get caught later by xfs_sync. + */ if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) goto out; - if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) - goto out_unlock; + } - error = xfs_iflush(ip, XFS_IFLUSH_ASYNC_NOBLOCK); + if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) + goto out_unlock; + + /* + * Now we have the flush lock and the inode is not pinned, we can check + * if the inode is really clean as we know that there are no pending + * transaction completions, it is not waiting on the delayed write + * queue and there is no IO in progress. + */ + if (xfs_inode_clean(ip)) { + xfs_ifunlock(ip); + error = 0; + goto out_unlock; } + error = xfs_iflush(ip, 0); out_unlock: xfs_iunlock(ip, XFS_ILOCK_SHARED); @@ -1257,6 +1309,29 @@ xfs_fs_statfs( 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, @@ -1336,11 +1411,27 @@ xfs_fs_remount( } 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; } @@ -1359,11 +1450,22 @@ xfs_fs_freeze( { 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 vfsmount *mnt) @@ -1585,6 +1687,7 @@ static const struct super_operations xfs_super_operations = { .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, diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 1f5e4bb5e970..a9f6d20aff41 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -90,14 +90,13 @@ xfs_inode_ag_lookup( STATIC int xfs_inode_ag_walk( struct xfs_mount *mp, - xfs_agnumber_t ag, + struct xfs_perag *pag, int (*execute)(struct xfs_inode *ip, struct xfs_perag *pag, int flags), int flags, int tag, int exclusive) { - struct xfs_perag *pag = &mp->m_perag[ag]; uint32_t first_index; int last_error = 0; int skipped; @@ -141,8 +140,6 @@ restart: delay(1); goto restart; } - - xfs_put_perag(mp, pag); return last_error; } @@ -160,10 +157,16 @@ xfs_inode_ag_iterator( xfs_agnumber_t ag; for (ag = 0; ag < mp->m_sb.sb_agcount; ag++) { - if (!mp->m_perag[ag].pag_ici_init) + struct xfs_perag *pag; + + pag = xfs_perag_get(mp, ag); + if (!pag->pag_ici_init) { + xfs_perag_put(pag); continue; - error = xfs_inode_ag_walk(mp, ag, execute, flags, tag, + } + error = xfs_inode_ag_walk(mp, pag, execute, flags, tag, exclusive); + xfs_perag_put(pag); if (error) { last_error = error; if (error == EFSCORRUPTED) @@ -231,7 +234,7 @@ xfs_sync_inode_data( } error = xfs_flush_pages(ip, 0, -1, (flags & SYNC_WAIT) ? - 0 : XFS_B_ASYNC, FI_NONE); + 0 : XBF_ASYNC, FI_NONE); xfs_iunlock(ip, XFS_IOLOCK_SHARED); out_wait: @@ -267,8 +270,7 @@ xfs_sync_inode_attr( goto out_unlock; } - error = xfs_iflush(ip, (flags & SYNC_WAIT) ? - XFS_IFLUSH_SYNC : XFS_IFLUSH_DELWRI); + error = xfs_iflush(ip, flags); out_unlock: xfs_iunlock(ip, XFS_ILOCK_SHARED); @@ -293,10 +295,7 @@ xfs_sync_data( if (error) return XFS_ERROR(error); - xfs_log_force(mp, 0, - (flags & SYNC_WAIT) ? - XFS_LOG_FORCE | XFS_LOG_SYNC : - XFS_LOG_FORCE); + xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0); return 0; } @@ -322,10 +321,6 @@ xfs_commit_dummy_trans( struct xfs_inode *ip = mp->m_rootip; struct xfs_trans *tp; int error; - int log_flags = XFS_LOG_FORCE; - - if (flags & SYNC_WAIT) - log_flags |= XFS_LOG_SYNC; /* * Put a dummy transaction in the log to tell recovery @@ -347,11 +342,11 @@ xfs_commit_dummy_trans( xfs_iunlock(ip, XFS_ILOCK_EXCL); /* the log force ensures this transaction is pushed to disk */ - xfs_log_force(mp, 0, log_flags); + xfs_log_force(mp, (flags & SYNC_WAIT) ? XFS_LOG_SYNC : 0); return error; } -int +STATIC int xfs_sync_fsdata( struct xfs_mount *mp, int flags) @@ -367,7 +362,7 @@ xfs_sync_fsdata( if (flags & SYNC_TRYLOCK) { ASSERT(!(flags & SYNC_WAIT)); - bp = xfs_getsb(mp, XFS_BUF_TRYLOCK); + bp = xfs_getsb(mp, XBF_TRYLOCK); if (!bp) goto out; @@ -387,7 +382,7 @@ xfs_sync_fsdata( * become pinned in between there and here. */ if (XFS_BUF_ISPINNED(bp)) - xfs_log_force(mp, 0, XFS_LOG_FORCE); + xfs_log_force(mp, 0); } @@ -448,9 +443,6 @@ xfs_quiesce_data( xfs_sync_data(mp, SYNC_WAIT); xfs_qm_sync(mp, SYNC_WAIT); - /* drop inode references pinned by filestreams */ - xfs_filestream_flush(mp); - /* write superblock and hoover up shutdown errors */ error = xfs_sync_fsdata(mp, SYNC_WAIT); @@ -467,16 +459,18 @@ xfs_quiesce_fs( { int count = 0, pincount; + xfs_reclaim_inodes(mp, 0); xfs_flush_buftarg(mp->m_ddev_targp, 0); - xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC); /* * This loop must run at least twice. The first instance of the loop * will flush most meta data but that will generate more meta data * (typically directory updates). Which then must be flushed and - * logged before we can write the unmount record. + * logged before we can write the unmount record. We also so sync + * reclaim of inodes to catch any that the above delwri flush skipped. */ do { + xfs_reclaim_inodes(mp, SYNC_WAIT); xfs_sync_attr(mp, SYNC_WAIT); pincount = xfs_flush_buftarg(mp->m_ddev_targp, 1); if (!pincount) { @@ -575,7 +569,7 @@ xfs_flush_inodes( igrab(inode); xfs_syncd_queue_work(ip->i_mount, inode, xfs_flush_inodes_work, &completion); wait_for_completion(&completion); - xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); + xfs_log_force(ip->i_mount, XFS_LOG_SYNC); } /* @@ -591,8 +585,8 @@ xfs_sync_worker( int error; if (!(mp->m_flags & XFS_MOUNT_RDONLY)) { - xfs_log_force(mp, (xfs_lsn_t)0, XFS_LOG_FORCE); - xfs_reclaim_inodes(mp, XFS_IFLUSH_DELWRI_ELSE_ASYNC); + xfs_log_force(mp, 0); + xfs_reclaim_inodes(mp, 0); /* dgc: errors ignored here */ error = xfs_qm_sync(mp, SYNC_TRYLOCK); error = xfs_sync_fsdata(mp, SYNC_TRYLOCK); @@ -690,16 +684,17 @@ void xfs_inode_set_reclaim_tag( xfs_inode_t *ip) { - xfs_mount_t *mp = ip->i_mount; - xfs_perag_t *pag = xfs_get_perag(mp, ip->i_ino); + struct xfs_mount *mp = ip->i_mount; + struct xfs_perag *pag; + pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); read_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); __xfs_inode_set_reclaim_tag(pag, ip); __xfs_iflags_set(ip, XFS_IRECLAIMABLE); spin_unlock(&ip->i_flags_lock); read_unlock(&pag->pag_ici_lock); - xfs_put_perag(mp, pag); + xfs_perag_put(pag); } void @@ -712,12 +707,64 @@ __xfs_inode_clear_reclaim_tag( XFS_INO_TO_AGINO(mp, ip->i_ino), XFS_ICI_RECLAIM_TAG); } +/* + * Inodes in different states need to be treated differently, and the return + * value of xfs_iflush is not sufficient to get this right. The following table + * lists the inode states and the reclaim actions necessary for non-blocking + * reclaim: + * + * + * inode state iflush ret required action + * --------------- ---------- --------------- + * bad - reclaim + * shutdown EIO unpin and reclaim + * clean, unpinned 0 reclaim + * stale, unpinned 0 reclaim + * clean, pinned(*) 0 requeue + * stale, pinned EAGAIN requeue + * dirty, delwri ok 0 requeue + * dirty, delwri blocked EAGAIN requeue + * dirty, sync flush 0 reclaim + * + * (*) dgc: I don't think the clean, pinned state is possible but it gets + * handled anyway given the order of checks implemented. + * + * As can be seen from the table, the return value of xfs_iflush() is not + * sufficient to correctly decide the reclaim action here. The checks in + * xfs_iflush() might look like duplicates, but they are not. + * + * Also, because we get the flush lock first, we know that any inode that has + * been flushed delwri has had the flush completed by the time we check that + * the inode is clean. The clean inode check needs to be done before flushing + * the inode delwri otherwise we would loop forever requeuing clean inodes as + * we cannot tell apart a successful delwri flush and a clean inode from the + * return value of xfs_iflush(). + * + * Note that because the inode is flushed delayed write by background + * writeback, the flush lock may already be held here and waiting on it can + * result in very long latencies. Hence for sync reclaims, where we wait on the + * flush lock, the caller should push out delayed write inodes first before + * trying to reclaim them to minimise the amount of time spent waiting. For + * background relaim, we just requeue the inode for the next pass. + * + * Hence the order of actions after gaining the locks should be: + * bad => reclaim + * shutdown => unpin and reclaim + * pinned, delwri => requeue + * pinned, sync => unpin + * stale => reclaim + * clean => reclaim + * dirty, delwri => flush and requeue + * dirty, sync => flush, wait and reclaim + */ STATIC int xfs_reclaim_inode( struct xfs_inode *ip, struct xfs_perag *pag, int sync_mode) { + int error = 0; + /* * The radix tree lock here protects a thread in xfs_iget from racing * with us starting reclaim on the inode. Once we have the @@ -735,33 +782,70 @@ xfs_reclaim_inode( spin_unlock(&ip->i_flags_lock); write_unlock(&pag->pag_ici_lock); - /* - * If the inode is still dirty, then flush it out. If the inode - * is not in the AIL, then it will be OK to flush it delwri as - * long as xfs_iflush() does not keep any references to the inode. - * We leave that decision up to xfs_iflush() since it has the - * knowledge of whether it's OK to simply do a delwri flush of - * the inode or whether we need to wait until the inode is - * pulled from the AIL. - * We get the flush lock regardless, though, just to make sure - * we don't free it while it is being flushed. - */ xfs_ilock(ip, XFS_ILOCK_EXCL); - xfs_iflock(ip); + if (!xfs_iflock_nowait(ip)) { + if (!(sync_mode & SYNC_WAIT)) + goto out; + xfs_iflock(ip); + } + + if (is_bad_inode(VFS_I(ip))) + goto reclaim; + if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { + xfs_iunpin_wait(ip); + goto reclaim; + } + if (xfs_ipincount(ip)) { + if (!(sync_mode & SYNC_WAIT)) { + xfs_ifunlock(ip); + goto out; + } + xfs_iunpin_wait(ip); + } + if (xfs_iflags_test(ip, XFS_ISTALE)) + goto reclaim; + if (xfs_inode_clean(ip)) + goto reclaim; + + /* Now we have an inode that needs flushing */ + error = xfs_iflush(ip, sync_mode); + if (sync_mode & SYNC_WAIT) { + xfs_iflock(ip); + goto reclaim; + } /* - * In the case of a forced shutdown we rely on xfs_iflush() to - * wait for the inode to be unpinned before returning an error. + * When we have to flush an inode but don't have SYNC_WAIT set, we + * flush the inode out using a delwri buffer and wait for the next + * call into reclaim to find it in a clean state instead of waiting for + * it now. We also don't return errors here - if the error is transient + * then the next reclaim pass will flush the inode, and if the error + * is permanent then the next sync reclaim will relcaim the inode and + * pass on the error. */ - if (!is_bad_inode(VFS_I(ip)) && xfs_iflush(ip, sync_mode) == 0) { - /* synchronize with xfs_iflush_done */ - xfs_iflock(ip); - xfs_ifunlock(ip); + if (error && !XFS_FORCED_SHUTDOWN(ip->i_mount)) { + xfs_fs_cmn_err(CE_WARN, ip->i_mount, + "inode 0x%llx background reclaim flush failed with %d", + (long long)ip->i_ino, error); } +out: + xfs_iflags_clear(ip, XFS_IRECLAIM); + xfs_iunlock(ip, XFS_ILOCK_EXCL); + /* + * We could return EAGAIN here to make reclaim rescan the inode tree in + * a short while. However, this just burns CPU time scanning the tree + * waiting for IO to complete and xfssyncd never goes back to the idle + * state. Instead, return 0 to let the next scheduled background reclaim + * attempt to reclaim the inode again. + */ + return 0; +reclaim: + xfs_ifunlock(ip); xfs_iunlock(ip, XFS_ILOCK_EXCL); xfs_ireclaim(ip); - return 0; + return error; + } int diff --git a/fs/xfs/linux-2.6/xfs_sync.h b/fs/xfs/linux-2.6/xfs_sync.h index ea932b43335d..d480c346cabb 100644 --- a/fs/xfs/linux-2.6/xfs_sync.h +++ b/fs/xfs/linux-2.6/xfs_sync.h @@ -37,7 +37,6 @@ void xfs_syncd_stop(struct xfs_mount *mp); int xfs_sync_attr(struct xfs_mount *mp, int flags); int xfs_sync_data(struct xfs_mount *mp, int flags); -int xfs_sync_fsdata(struct xfs_mount *mp, int flags); int xfs_quiesce_data(struct xfs_mount *mp); void xfs_quiesce_attr(struct xfs_mount *mp); diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index c22a608321a3..a4574dcf5065 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -78,6 +78,33 @@ DECLARE_EVENT_CLASS(xfs_attr_list_class, ) ) +#define DEFINE_PERAG_REF_EVENT(name) \ +TRACE_EVENT(name, \ + TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, int refcount, \ + unsigned long caller_ip), \ + TP_ARGS(mp, agno, refcount, caller_ip), \ + TP_STRUCT__entry( \ + __field(dev_t, dev) \ + __field(xfs_agnumber_t, agno) \ + __field(int, refcount) \ + __field(unsigned long, caller_ip) \ + ), \ + TP_fast_assign( \ + __entry->dev = mp->m_super->s_dev; \ + __entry->agno = agno; \ + __entry->refcount = refcount; \ + __entry->caller_ip = caller_ip; \ + ), \ + TP_printk("dev %d:%d agno %u refcount %d caller %pf", \ + MAJOR(__entry->dev), MINOR(__entry->dev), \ + __entry->agno, \ + __entry->refcount, \ + (char *)__entry->caller_ip) \ +); + +DEFINE_PERAG_REF_EVENT(xfs_perag_get) +DEFINE_PERAG_REF_EVENT(xfs_perag_put) + #define DEFINE_ATTR_LIST_EVENT(name) \ DEFINE_EVENT(xfs_attr_list_class, name, \ TP_PROTO(struct xfs_attr_list_context *ctx), \ @@ -456,6 +483,7 @@ DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unlock); DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unlock_stale); DEFINE_BUF_ITEM_EVENT(xfs_buf_item_committed); DEFINE_BUF_ITEM_EVENT(xfs_buf_item_push); +DEFINE_BUF_ITEM_EVENT(xfs_buf_item_pushbuf); DEFINE_BUF_ITEM_EVENT(xfs_trans_get_buf); DEFINE_BUF_ITEM_EVENT(xfs_trans_get_buf_recur); DEFINE_BUF_ITEM_EVENT(xfs_trans_getsb); @@ -1414,6 +1442,59 @@ TRACE_EVENT(xfs_dir2_leafn_moveents, __entry->count) ); +#define XFS_SWAPEXT_INODES \ + { 0, "target" }, \ + { 1, "temp" } + +#define XFS_INODE_FORMAT_STR \ + { 0, "invalid" }, \ + { 1, "local" }, \ + { 2, "extent" }, \ + { 3, "btree" } + +DECLARE_EVENT_CLASS(xfs_swap_extent_class, + TP_PROTO(struct xfs_inode *ip, int which), + TP_ARGS(ip, which), + TP_STRUCT__entry( + __field(dev_t, dev) + __field(int, which) + __field(xfs_ino_t, ino) + __field(int, format) + __field(int, nex) + __field(int, max_nex) + __field(int, broot_size) + __field(int, fork_off) + ), + TP_fast_assign( + __entry->dev = VFS_I(ip)->i_sb->s_dev; + __entry->which = which; + __entry->ino = ip->i_ino; + __entry->format = ip->i_d.di_format; + __entry->nex = ip->i_d.di_nextents; + __entry->max_nex = ip->i_df.if_ext_max; + __entry->broot_size = ip->i_df.if_broot_bytes; + __entry->fork_off = XFS_IFORK_BOFF(ip); + ), + TP_printk("dev %d:%d ino 0x%llx (%s), %s format, num_extents %d, " + "Max in-fork extents %d, broot size %d, fork offset %d", + MAJOR(__entry->dev), MINOR(__entry->dev), + __entry->ino, + __print_symbolic(__entry->which, XFS_SWAPEXT_INODES), + __print_symbolic(__entry->format, XFS_INODE_FORMAT_STR), + __entry->nex, + __entry->max_nex, + __entry->broot_size, + __entry->fork_off) +) + +#define DEFINE_SWAPEXT_EVENT(name) \ +DEFINE_EVENT(xfs_swap_extent_class, name, \ + TP_PROTO(struct xfs_inode *ip, int which), \ + TP_ARGS(ip, which)) + +DEFINE_SWAPEXT_EVENT(xfs_swap_extent_before); +DEFINE_SWAPEXT_EVENT(xfs_swap_extent_after); + #endif /* _TRACE_XFS_H */ #undef TRACE_INCLUDE_PATH diff --git a/fs/xfs/linux-2.6/xfs_xattr.c b/fs/xfs/linux-2.6/xfs_xattr.c index 0b1878857fc3..fa01b9daba6b 100644 --- a/fs/xfs/linux-2.6/xfs_xattr.c +++ b/fs/xfs/linux-2.6/xfs_xattr.c @@ -45,7 +45,7 @@ xfs_xattr_get(struct dentry *dentry, const char *name, value = NULL; } - error = -xfs_attr_get(ip, name, value, &asize, xflags); + error = -xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags); if (error) return error; return asize; @@ -67,8 +67,9 @@ xfs_xattr_set(struct dentry *dentry, const char *name, const void *value, xflags |= ATTR_REPLACE; if (!value) - return -xfs_attr_remove(ip, name, xflags); - return -xfs_attr_set(ip, name, (void *)value, size, xflags); + return -xfs_attr_remove(ip, (unsigned char *)name, xflags); + return -xfs_attr_set(ip, (unsigned char *)name, + (void *)value, size, xflags); } static struct xattr_handler xfs_xattr_user_handler = { @@ -124,8 +125,13 @@ static const char *xfs_xattr_prefix(int flags) } static int -xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags, - char *name, int namelen, int valuelen, char *value) +xfs_xattr_put_listent( + struct xfs_attr_list_context *context, + int flags, + unsigned char *name, + int namelen, + int valuelen, + unsigned char *value) { unsigned int prefix_len = xfs_xattr_prefix_len(flags); char *offset; @@ -148,7 +154,7 @@ xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags, offset = (char *)context->alist + context->count; strncpy(offset, xfs_xattr_prefix(flags), prefix_len); offset += prefix_len; - strncpy(offset, name, namelen); /* real name */ + strncpy(offset, (char *)name, namelen); /* real name */ offset += namelen; *offset = '\0'; context->count += prefix_len + namelen + 1; @@ -156,8 +162,13 @@ xfs_xattr_put_listent(struct xfs_attr_list_context *context, int flags, } static int -xfs_xattr_put_listent_sizes(struct xfs_attr_list_context *context, int flags, - char *name, int namelen, int valuelen, char *value) +xfs_xattr_put_listent_sizes( + struct xfs_attr_list_context *context, + int flags, + unsigned char *name, + int namelen, + int valuelen, + unsigned char *value) { context->count += xfs_xattr_prefix_len(flags) + namelen + 1; return 0; |
