diff options
Diffstat (limited to 'fs/xfs/quota/xfs_dquot_item.c')
| -rw-r--r-- | fs/xfs/quota/xfs_dquot_item.c | 663 |
1 files changed, 0 insertions, 663 deletions
diff --git a/fs/xfs/quota/xfs_dquot_item.c b/fs/xfs/quota/xfs_dquot_item.c deleted file mode 100644 index 1728f6a7c4f..00000000000 --- a/fs/xfs/quota/xfs_dquot_item.c +++ /dev/null @@ -1,663 +0,0 @@ -/* - * Copyright (c) 2000-2003 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "xfs.h" -#include "xfs_fs.h" -#include "xfs_bit.h" -#include "xfs_log.h" -#include "xfs_inum.h" -#include "xfs_trans.h" -#include "xfs_sb.h" -#include "xfs_ag.h" -#include "xfs_dir2.h" -#include "xfs_alloc.h" -#include "xfs_dmapi.h" -#include "xfs_quota.h" -#include "xfs_mount.h" -#include "xfs_bmap_btree.h" -#include "xfs_alloc_btree.h" -#include "xfs_ialloc_btree.h" -#include "xfs_dir2_sf.h" -#include "xfs_attr_sf.h" -#include "xfs_dinode.h" -#include "xfs_inode.h" -#include "xfs_bmap.h" -#include "xfs_btree.h" -#include "xfs_ialloc.h" -#include "xfs_rtalloc.h" -#include "xfs_error.h" -#include "xfs_itable.h" -#include "xfs_rw.h" -#include "xfs_acl.h" -#include "xfs_attr.h" -#include "xfs_buf_item.h" -#include "xfs_trans_priv.h" -#include "xfs_qm.h" - -/* - * returns the number of iovecs needed to log the given dquot item. - */ -/* ARGSUSED */ -STATIC uint -xfs_qm_dquot_logitem_size( - xfs_dq_logitem_t *logitem) -{ - /* - * we need only two iovecs, one for the format, one for the real thing - */ - return (2); -} - -/* - * fills in the vector of log iovecs for the given dquot log item. - */ -STATIC void -xfs_qm_dquot_logitem_format( - xfs_dq_logitem_t *logitem, - xfs_log_iovec_t *logvec) -{ - ASSERT(logitem); - ASSERT(logitem->qli_dquot); - - logvec->i_addr = (xfs_caddr_t)&logitem->qli_format; - logvec->i_len = sizeof(xfs_dq_logformat_t); - XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_QFORMAT); - logvec++; - logvec->i_addr = (xfs_caddr_t)&logitem->qli_dquot->q_core; - logvec->i_len = sizeof(xfs_disk_dquot_t); - XLOG_VEC_SET_TYPE(logvec, XLOG_REG_TYPE_DQUOT); - - ASSERT(2 == logitem->qli_item.li_desc->lid_size); - logitem->qli_format.qlf_size = 2; - -} - -/* - * Increment the pin count of the given dquot. - */ -STATIC void -xfs_qm_dquot_logitem_pin( - xfs_dq_logitem_t *logitem) -{ - xfs_dquot_t *dqp = logitem->qli_dquot; - - ASSERT(XFS_DQ_IS_LOCKED(dqp)); - atomic_inc(&dqp->q_pincount); -} - -/* - * Decrement the pin count of the given dquot, and wake up - * anyone in xfs_dqwait_unpin() if the count goes to 0. The - * dquot must have been previously pinned with a call to - * xfs_qm_dquot_logitem_pin(). - */ -/* ARGSUSED */ -STATIC void -xfs_qm_dquot_logitem_unpin( - xfs_dq_logitem_t *logitem, - int stale) -{ - xfs_dquot_t *dqp = logitem->qli_dquot; - - ASSERT(atomic_read(&dqp->q_pincount) > 0); - if (atomic_dec_and_test(&dqp->q_pincount)) - wake_up(&dqp->q_pinwait); -} - -/* ARGSUSED */ -STATIC void -xfs_qm_dquot_logitem_unpin_remove( - xfs_dq_logitem_t *logitem, - xfs_trans_t *tp) -{ - xfs_qm_dquot_logitem_unpin(logitem, 0); -} - -/* - * Given the logitem, this writes the corresponding dquot entry to disk - * asynchronously. This is called with the dquot entry securely locked; - * we simply get xfs_qm_dqflush() to do the work, and unlock the dquot - * at the end. - */ -STATIC void -xfs_qm_dquot_logitem_push( - xfs_dq_logitem_t *logitem) -{ - xfs_dquot_t *dqp; - int error; - - dqp = logitem->qli_dquot; - - ASSERT(XFS_DQ_IS_LOCKED(dqp)); - ASSERT(!completion_done(&dqp->q_flush)); - - /* - * Since we were able to lock the dquot's flush lock and - * we found it on the AIL, the dquot must be dirty. This - * is because the dquot is removed from the AIL while still - * holding the flush lock in xfs_dqflush_done(). Thus, if - * we found it in the AIL and were able to obtain the flush - * lock without sleeping, then there must not have been - * anyone in the process of flushing the dquot. - */ - error = xfs_qm_dqflush(dqp, XFS_QMOPT_DELWRI); - if (error) - xfs_fs_cmn_err(CE_WARN, dqp->q_mount, - "xfs_qm_dquot_logitem_push: push error %d on dqp %p", - error, dqp); - xfs_dqunlock(dqp); -} - -/*ARGSUSED*/ -STATIC xfs_lsn_t -xfs_qm_dquot_logitem_committed( - xfs_dq_logitem_t *l, - xfs_lsn_t lsn) -{ - /* - * We always re-log the entire dquot when it becomes dirty, - * so, the latest copy _is_ the only one that matters. - */ - return (lsn); -} - - -/* - * This is called to wait for the given dquot to be unpinned. - * Most of these pin/unpin routines are plagiarized from inode code. - */ -void -xfs_qm_dqunpin_wait( - xfs_dquot_t *dqp) -{ - ASSERT(XFS_DQ_IS_LOCKED(dqp)); - if (atomic_read(&dqp->q_pincount) == 0) - return; - - /* - * Give the log a push so we don't wait here too long. - */ - xfs_log_force(dqp->q_mount, (xfs_lsn_t)0, XFS_LOG_FORCE); - wait_event(dqp->q_pinwait, (atomic_read(&dqp->q_pincount) == 0)); -} - -/* - * This is called when IOP_TRYLOCK returns XFS_ITEM_PUSHBUF to indicate that - * the dquot is locked by us, but the flush lock isn't. So, here we are - * going to see if the relevant dquot buffer is incore, waiting on DELWRI. - * If so, we want to push it out to help us take this item off the AIL as soon - * as possible. - * - * We must not be holding the AIL lock at this point. Calling incore() to - * search the buffer cache can be a time consuming thing, and AIL lock is a - * spinlock. - */ -STATIC void -xfs_qm_dquot_logitem_pushbuf( - xfs_dq_logitem_t *qip) -{ - xfs_dquot_t *dqp; - xfs_mount_t *mp; - xfs_buf_t *bp; - uint dopush; - - dqp = qip->qli_dquot; - ASSERT(XFS_DQ_IS_LOCKED(dqp)); - - /* - * The qli_pushbuf_flag keeps others from - * trying to duplicate our effort. - */ - ASSERT(qip->qli_pushbuf_flag != 0); - ASSERT(qip->qli_push_owner == current_pid()); - - /* - * If flushlock isn't locked anymore, chances are that the - * inode flush completed and the inode was taken off the AIL. - * So, just get out. - */ - if (completion_done(&dqp->q_flush) || - ((qip->qli_item.li_flags & XFS_LI_IN_AIL) == 0)) { - qip->qli_pushbuf_flag = 0; - xfs_dqunlock(dqp); - return; - } - mp = dqp->q_mount; - bp = xfs_incore(mp->m_ddev_targp, qip->qli_format.qlf_blkno, - XFS_QI_DQCHUNKLEN(mp), - XFS_INCORE_TRYLOCK); - if (bp != NULL) { - if (XFS_BUF_ISDELAYWRITE(bp)) { - dopush = ((qip->qli_item.li_flags & XFS_LI_IN_AIL) && - !completion_done(&dqp->q_flush)); - qip->qli_pushbuf_flag = 0; - xfs_dqunlock(dqp); - - if (XFS_BUF_ISPINNED(bp)) { - xfs_log_force(mp, (xfs_lsn_t)0, - XFS_LOG_FORCE); - } - if (dopush) { - int error; -#ifdef XFSRACEDEBUG - delay_for_intr(); - delay(300); -#endif - error = xfs_bawrite(mp, bp); - if (error) - xfs_fs_cmn_err(CE_WARN, mp, - "xfs_qm_dquot_logitem_pushbuf: pushbuf error %d on qip %p, bp %p", - error, qip, bp); - } else { - xfs_buf_relse(bp); - } - } else { - qip->qli_pushbuf_flag = 0; - xfs_dqunlock(dqp); - xfs_buf_relse(bp); - } - return; - } - - qip->qli_pushbuf_flag = 0; - xfs_dqunlock(dqp); -} - -/* - * This is called to attempt to lock the dquot associated with this - * dquot log item. Don't sleep on the dquot lock or the flush lock. - * If the flush lock is already held, indicating that the dquot has - * been or is in the process of being flushed, then see if we can - * find the dquot's buffer in the buffer cache without sleeping. If - * we can and it is marked delayed write, then we want to send it out. - * We delay doing so until the push routine, though, to avoid sleeping - * in any device strategy routines. - */ -STATIC uint -xfs_qm_dquot_logitem_trylock( - xfs_dq_logitem_t *qip) -{ - xfs_dquot_t *dqp; - uint retval; - - dqp = qip->qli_dquot; - if (atomic_read(&dqp->q_pincount) > 0) - return (XFS_ITEM_PINNED); - - if (! xfs_qm_dqlock_nowait(dqp)) - return (XFS_ITEM_LOCKED); - - retval = XFS_ITEM_SUCCESS; - if (!xfs_dqflock_nowait(dqp)) { - /* - * The dquot is already being flushed. It may have been - * flushed delayed write, however, and we don't want to - * get stuck waiting for that to complete. So, we want to check - * to see if we can lock the dquot's buffer without sleeping. - * If we can and it is marked for delayed write, then we - * hold it and send it out from the push routine. We don't - * want to do that now since we might sleep in the device - * strategy routine. We also don't want to grab the buffer lock - * here because we'd like not to call into the buffer cache - * while holding the AIL lock. - * Make sure to only return PUSHBUF if we set pushbuf_flag - * ourselves. If someone else is doing it then we don't - * want to go to the push routine and duplicate their efforts. - */ - if (qip->qli_pushbuf_flag == 0) { - qip->qli_pushbuf_flag = 1; - ASSERT(qip->qli_format.qlf_blkno == dqp->q_blkno); -#ifdef DEBUG - qip->qli_push_owner = current_pid(); -#endif - /* - * The dquot is left locked. - */ - retval = XFS_ITEM_PUSHBUF; - } else { - retval = XFS_ITEM_FLUSHING; - xfs_dqunlock_nonotify(dqp); - } - } - - ASSERT(qip->qli_item.li_flags & XFS_LI_IN_AIL); - return (retval); -} - - -/* - * Unlock the dquot associated with the log item. - * Clear the fields of the dquot and dquot log item that - * are specific to the current transaction. If the - * hold flags is set, do not unlock the dquot. - */ -STATIC void -xfs_qm_dquot_logitem_unlock( - xfs_dq_logitem_t *ql) -{ - xfs_dquot_t *dqp; - - ASSERT(ql != NULL); - dqp = ql->qli_dquot; - ASSERT(XFS_DQ_IS_LOCKED(dqp)); - - /* - * Clear the transaction pointer in the dquot - */ - dqp->q_transp = NULL; - - /* - * dquots are never 'held' from getting unlocked at the end of - * a transaction. Their locking and unlocking is hidden inside the - * transaction layer, within trans_commit. Hence, no LI_HOLD flag - * for the logitem. - */ - xfs_dqunlock(dqp); -} - - -/* - * this needs to stamp an lsn into the dquot, I think. - * rpc's that look at user dquot's would then have to - * push on the dependency recorded in the dquot - */ -/* ARGSUSED */ -STATIC void -xfs_qm_dquot_logitem_committing( - xfs_dq_logitem_t *l, - xfs_lsn_t lsn) -{ - return; -} - - -/* - * This is the ops vector for dquots - */ -static struct xfs_item_ops xfs_dquot_item_ops = { - .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size, - .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) - xfs_qm_dquot_logitem_format, - .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_pin, - .iop_unpin = (void(*)(xfs_log_item_t*, int)) - xfs_qm_dquot_logitem_unpin, - .iop_unpin_remove = (void(*)(xfs_log_item_t*, xfs_trans_t*)) - xfs_qm_dquot_logitem_unpin_remove, - .iop_trylock = (uint(*)(xfs_log_item_t*)) - xfs_qm_dquot_logitem_trylock, - .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_unlock, - .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_dquot_logitem_committed, - .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_push, - .iop_pushbuf = (void(*)(xfs_log_item_t*)) - xfs_qm_dquot_logitem_pushbuf, - .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_dquot_logitem_committing -}; - -/* - * Initialize the dquot log item for a newly allocated dquot. - * The dquot isn't locked at this point, but it isn't on any of the lists - * either, so we don't care. - */ -void -xfs_qm_dquot_logitem_init( - struct xfs_dquot *dqp) -{ - xfs_dq_logitem_t *lp; - lp = &dqp->q_logitem; - - lp->qli_item.li_type = XFS_LI_DQUOT; - lp->qli_item.li_ops = &xfs_dquot_item_ops; - lp->qli_item.li_mountp = dqp->q_mount; - lp->qli_dquot = dqp; - lp->qli_format.qlf_type = XFS_LI_DQUOT; - lp->qli_format.qlf_id = be32_to_cpu(dqp->q_core.d_id); - lp->qli_format.qlf_blkno = dqp->q_blkno; - lp->qli_format.qlf_len = 1; - /* - * This is just the offset of this dquot within its buffer - * (which is currently 1 FSB and probably won't change). - * Hence 32 bits for this offset should be just fine. - * Alternatively, we can store (bufoffset / sizeof(xfs_dqblk_t)) - * here, and recompute it at recovery time. - */ - lp->qli_format.qlf_boffset = (__uint32_t)dqp->q_bufoffset; -} - -/*------------------ QUOTAOFF LOG ITEMS -------------------*/ - -/* - * This returns the number of iovecs needed to log the given quotaoff item. - * We only need 1 iovec for an quotaoff item. It just logs the - * quotaoff_log_format structure. - */ -/*ARGSUSED*/ -STATIC uint -xfs_qm_qoff_logitem_size(xfs_qoff_logitem_t *qf) -{ - return (1); -} - -/* - * This is called to fill in the vector of log iovecs for the - * given quotaoff log item. We use only 1 iovec, and we point that - * at the quotaoff_log_format structure embedded in the quotaoff item. - * It is at this point that we assert that all of the extent - * slots in the quotaoff item have been filled. - */ -STATIC void -xfs_qm_qoff_logitem_format(xfs_qoff_logitem_t *qf, - xfs_log_iovec_t *log_vector) -{ - ASSERT(qf->qql_format.qf_type == XFS_LI_QUOTAOFF); - - log_vector->i_addr = (xfs_caddr_t)&(qf->qql_format); - log_vector->i_len = sizeof(xfs_qoff_logitem_t); - XLOG_VEC_SET_TYPE(log_vector, XLOG_REG_TYPE_QUOTAOFF); - qf->qql_format.qf_size = 1; -} - - -/* - * Pinning has no meaning for an quotaoff item, so just return. - */ -/*ARGSUSED*/ -STATIC void -xfs_qm_qoff_logitem_pin(xfs_qoff_logitem_t *qf) -{ - return; -} - - -/* - * Since pinning has no meaning for an quotaoff item, unpinning does - * not either. - */ -/*ARGSUSED*/ -STATIC void -xfs_qm_qoff_logitem_unpin(xfs_qoff_logitem_t *qf, int stale) -{ - return; -} - -/*ARGSUSED*/ -STATIC void -xfs_qm_qoff_logitem_unpin_remove(xfs_qoff_logitem_t *qf, xfs_trans_t *tp) -{ - return; -} - -/* - * Quotaoff items have no locking, so just return success. - */ -/*ARGSUSED*/ -STATIC uint -xfs_qm_qoff_logitem_trylock(xfs_qoff_logitem_t *qf) -{ - return XFS_ITEM_LOCKED; -} - -/* - * Quotaoff items have no locking or pushing, so return failure - * so that the caller doesn't bother with us. - */ -/*ARGSUSED*/ -STATIC void -xfs_qm_qoff_logitem_unlock(xfs_qoff_logitem_t *qf) -{ - return; -} - -/* - * The quotaoff-start-item is logged only once and cannot be moved in the log, - * so simply return the lsn at which it's been logged. - */ -/*ARGSUSED*/ -STATIC xfs_lsn_t -xfs_qm_qoff_logitem_committed(xfs_qoff_logitem_t *qf, xfs_lsn_t lsn) -{ - return (lsn); -} - -/* - * There isn't much you can do to push on an quotaoff item. It is simply - * stuck waiting for the log to be flushed to disk. - */ -/*ARGSUSED*/ -STATIC void -xfs_qm_qoff_logitem_push(xfs_qoff_logitem_t *qf) -{ - return; -} - - -/*ARGSUSED*/ -STATIC xfs_lsn_t -xfs_qm_qoffend_logitem_committed( - xfs_qoff_logitem_t *qfe, - xfs_lsn_t lsn) -{ - xfs_qoff_logitem_t *qfs; - struct xfs_ail *ailp; - - qfs = qfe->qql_start_lip; - ailp = qfs->qql_item.li_ailp; - spin_lock(&ailp->xa_lock); - /* - * Delete the qoff-start logitem from the AIL. - * xfs_trans_ail_delete() drops the AIL lock. - */ - xfs_trans_ail_delete(ailp, (xfs_log_item_t *)qfs); - kmem_free(qfs); - kmem_free(qfe); - return (xfs_lsn_t)-1; -} - -/* - * XXX rcc - don't know quite what to do with this. I think we can - * just ignore it. The only time that isn't the case is if we allow - * the client to somehow see that quotas have been turned off in which - * we can't allow that to get back until the quotaoff hits the disk. - * So how would that happen? Also, do we need different routines for - * quotaoff start and quotaoff end? I suspect the answer is yes but - * to be sure, I need to look at the recovery code and see how quota off - * recovery is handled (do we roll forward or back or do something else). - * If we roll forwards or backwards, then we need two separate routines, - * one that does nothing and one that stamps in the lsn that matters - * (truly makes the quotaoff irrevocable). If we do something else, - * then maybe we don't need two. - */ -/* ARGSUSED */ -STATIC void -xfs_qm_qoff_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) -{ - return; -} - -/* ARGSUSED */ -STATIC void -xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn) -{ - return; -} - -static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = { - .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, - .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) - xfs_qm_qoff_logitem_format, - .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, - .iop_unpin = (void(*)(xfs_log_item_t* ,int)) - xfs_qm_qoff_logitem_unpin, - .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) - xfs_qm_qoff_logitem_unpin_remove, - .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, - .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, - .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_qoffend_logitem_committed, - .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, - .iop_pushbuf = NULL, - .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_qoffend_logitem_committing -}; - -/* - * This is the ops vector shared by all quotaoff-start log items. - */ -static struct xfs_item_ops xfs_qm_qoff_logitem_ops = { - .iop_size = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size, - .iop_format = (void(*)(xfs_log_item_t*, xfs_log_iovec_t*)) - xfs_qm_qoff_logitem_format, - .iop_pin = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_pin, - .iop_unpin = (void(*)(xfs_log_item_t*, int)) - xfs_qm_qoff_logitem_unpin, - .iop_unpin_remove = (void(*)(xfs_log_item_t*,xfs_trans_t*)) - xfs_qm_qoff_logitem_unpin_remove, - .iop_trylock = (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_trylock, - .iop_unlock = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_unlock, - .iop_committed = (xfs_lsn_t(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_qoff_logitem_committed, - .iop_push = (void(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_push, - .iop_pushbuf = NULL, - .iop_committing = (void(*)(xfs_log_item_t*, xfs_lsn_t)) - xfs_qm_qoff_logitem_committing -}; - -/* - * Allocate and initialize an quotaoff item of the correct quota type(s). - */ -xfs_qoff_logitem_t * -xfs_qm_qoff_logitem_init( - struct xfs_mount *mp, - xfs_qoff_logitem_t *start, - uint flags) -{ - xfs_qoff_logitem_t *qf; - - qf = (xfs_qoff_logitem_t*) kmem_zalloc(sizeof(xfs_qoff_logitem_t), KM_SLEEP); - - qf->qql_item.li_type = XFS_LI_QUOTAOFF; - if (start) - qf->qql_item.li_ops = &xfs_qm_qoffend_logitem_ops; - else - qf->qql_item.li_ops = &xfs_qm_qoff_logitem_ops; - qf->qql_item.li_mountp = mp; - qf->qql_format.qf_type = XFS_LI_QUOTAOFF; - qf->qql_format.qf_flags = flags; - qf->qql_start_lip = start; - return (qf); -} |