| /* |
| * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_types.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_dmapi.h" |
| #include "xfs_mount.h" |
| #include "xfs_da_btree.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_inode_item.h" |
| #include "xfs_itable.h" |
| #include "xfs_btree.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_alloc.h" |
| #include "xfs_bmap.h" |
| #include "xfs_attr.h" |
| #include "xfs_rw.h" |
| #include "xfs_error.h" |
| #include "xfs_quota.h" |
| #include "xfs_utils.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_refcache.h" |
| #include "xfs_trans_space.h" |
| #include "xfs_log_priv.h" |
| #include "xfs_mac.h" |
| |
| STATIC int |
| xfs_open( |
| bhv_desc_t *bdp, |
| cred_t *credp) |
| { |
| int mode; |
| bhv_vnode_t *vp = BHV_TO_VNODE(bdp); |
| xfs_inode_t *ip = XFS_BHVTOI(bdp); |
| |
| if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| return XFS_ERROR(EIO); |
| |
| /* |
| * If it's a directory with any blocks, read-ahead block 0 |
| * as we're almost certain to have the next operation be a read there. |
| */ |
| if (VN_ISDIR(vp) && ip->i_d.di_nextents > 0) { |
| mode = xfs_ilock_map_shared(ip); |
| if (ip->i_d.di_nextents > 0) |
| (void)xfs_da_reada_buf(NULL, ip, 0, XFS_DATA_FORK); |
| xfs_iunlock(ip, mode); |
| } |
| return 0; |
| } |
| |
| STATIC int |
| xfs_close( |
| bhv_desc_t *bdp, |
| int flags, |
| lastclose_t lastclose, |
| cred_t *credp) |
| { |
| bhv_vnode_t *vp = BHV_TO_VNODE(bdp); |
| xfs_inode_t *ip = XFS_BHVTOI(bdp); |
| |
| if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| return XFS_ERROR(EIO); |
| |
| if (lastclose != L_TRUE || !VN_ISREG(vp)) |
| return 0; |
| |
| /* |
| * If we previously truncated this file and removed old data in |
| * the process, we want to initiate "early" writeout on the last |
| * close. This is an attempt to combat the notorious NULL files |
| * problem which is particularly noticable from a truncate down, |
| * buffered (re-)write (delalloc), followed by a crash. What we |
| * are effectively doing here is significantly reducing the time |
| * window where we'd otherwise be exposed to that problem. |
| */ |
| if (VUNTRUNCATE(vp) && VN_DIRTY(vp) && ip->i_delayed_blks > 0) |
| return bhv_vop_flush_pages(vp, 0, -1, XFS_B_ASYNC, FI_NONE); |
| return 0; |
| } |
| |
| /* |
| * xfs_getattr |
| */ |
| STATIC int |
| xfs_getattr( |
| bhv_desc_t *bdp, |
| bhv_vattr_t *vap, |
| int flags, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| xfs_mount_t *mp; |
| bhv_vnode_t *vp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| if (!(flags & ATTR_LAZY)) |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| |
| vap->va_size = ip->i_d.di_size; |
| if (vap->va_mask == XFS_AT_SIZE) |
| goto all_done; |
| |
| vap->va_nblocks = |
| XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); |
| vap->va_nodeid = ip->i_ino; |
| #if XFS_BIG_INUMS |
| vap->va_nodeid += mp->m_inoadd; |
| #endif |
| vap->va_nlink = ip->i_d.di_nlink; |
| |
| /* |
| * Quick exit for non-stat callers |
| */ |
| if ((vap->va_mask & |
| ~(XFS_AT_SIZE|XFS_AT_FSID|XFS_AT_NODEID| |
| XFS_AT_NLINK|XFS_AT_BLKSIZE)) == 0) |
| goto all_done; |
| |
| /* |
| * Copy from in-core inode. |
| */ |
| vap->va_mode = ip->i_d.di_mode; |
| vap->va_uid = ip->i_d.di_uid; |
| vap->va_gid = ip->i_d.di_gid; |
| vap->va_projid = ip->i_d.di_projid; |
| |
| /* |
| * Check vnode type block/char vs. everything else. |
| */ |
| switch (ip->i_d.di_mode & S_IFMT) { |
| case S_IFBLK: |
| case S_IFCHR: |
| vap->va_rdev = ip->i_df.if_u2.if_rdev; |
| vap->va_blocksize = BLKDEV_IOSIZE; |
| break; |
| default: |
| vap->va_rdev = 0; |
| |
| if (!(ip->i_d.di_flags & XFS_DIFLAG_REALTIME)) { |
| vap->va_blocksize = xfs_preferred_iosize(mp); |
| } else { |
| |
| /* |
| * If the file blocks are being allocated from a |
| * realtime partition, then return the inode's |
| * realtime extent size or the realtime volume's |
| * extent size. |
| */ |
| vap->va_blocksize = ip->i_d.di_extsize ? |
| (ip->i_d.di_extsize << mp->m_sb.sb_blocklog) : |
| (mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog); |
| } |
| break; |
| } |
| |
| vn_atime_to_timespec(vp, &vap->va_atime); |
| vap->va_mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
| vap->va_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; |
| vap->va_ctime.tv_sec = ip->i_d.di_ctime.t_sec; |
| vap->va_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; |
| |
| /* |
| * Exit for stat callers. See if any of the rest of the fields |
| * to be filled in are needed. |
| */ |
| if ((vap->va_mask & |
| (XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| |
| XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) |
| goto all_done; |
| |
| /* |
| * Convert di_flags to xflags. |
| */ |
| vap->va_xflags = xfs_ip2xflags(ip); |
| |
| /* |
| * Exit for inode revalidate. See if any of the rest of |
| * the fields to be filled in are needed. |
| */ |
| if ((vap->va_mask & |
| (XFS_AT_EXTSIZE|XFS_AT_NEXTENTS|XFS_AT_ANEXTENTS| |
| XFS_AT_GENCOUNT|XFS_AT_VCODE)) == 0) |
| goto all_done; |
| |
| vap->va_extsize = ip->i_d.di_extsize << mp->m_sb.sb_blocklog; |
| vap->va_nextents = |
| (ip->i_df.if_flags & XFS_IFEXTENTS) ? |
| ip->i_df.if_bytes / sizeof(xfs_bmbt_rec_t) : |
| ip->i_d.di_nextents; |
| if (ip->i_afp) |
| vap->va_anextents = |
| (ip->i_afp->if_flags & XFS_IFEXTENTS) ? |
| ip->i_afp->if_bytes / sizeof(xfs_bmbt_rec_t) : |
| ip->i_d.di_anextents; |
| else |
| vap->va_anextents = 0; |
| vap->va_gen = ip->i_d.di_gen; |
| |
| all_done: |
| if (!(flags & ATTR_LAZY)) |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| return 0; |
| } |
| |
| |
| /* |
| * xfs_setattr |
| */ |
| int |
| xfs_setattr( |
| bhv_desc_t *bdp, |
| bhv_vattr_t *vap, |
| int flags, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| int mask; |
| int code; |
| uint lock_flags; |
| uint commit_flags=0; |
| uid_t uid=0, iuid=0; |
| gid_t gid=0, igid=0; |
| int timeflags = 0; |
| bhv_vnode_t *vp; |
| xfs_prid_t projid=0, iprojid=0; |
| int mandlock_before, mandlock_after; |
| struct xfs_dquot *udqp, *gdqp, *olddquot1, *olddquot2; |
| int file_owner; |
| int need_iolock = 1; |
| |
| vp = BHV_TO_VNODE(bdp); |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| return XFS_ERROR(EROFS); |
| |
| /* |
| * Cannot set certain attributes. |
| */ |
| mask = vap->va_mask; |
| if (mask & XFS_AT_NOSET) { |
| return XFS_ERROR(EINVAL); |
| } |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| /* |
| * Timestamps do not need to be logged and hence do not |
| * need to be done within a transaction. |
| */ |
| if (mask & XFS_AT_UPDTIMES) { |
| ASSERT((mask & ~XFS_AT_UPDTIMES) == 0); |
| timeflags = ((mask & XFS_AT_UPDATIME) ? XFS_ICHGTIME_ACC : 0) | |
| ((mask & XFS_AT_UPDCTIME) ? XFS_ICHGTIME_CHG : 0) | |
| ((mask & XFS_AT_UPDMTIME) ? XFS_ICHGTIME_MOD : 0); |
| xfs_ichgtime(ip, timeflags); |
| return 0; |
| } |
| |
| olddquot1 = olddquot2 = NULL; |
| udqp = gdqp = NULL; |
| |
| /* |
| * If disk quotas is on, we make sure that the dquots do exist on disk, |
| * before we start any other transactions. Trying to do this later |
| * is messy. We don't care to take a readlock to look at the ids |
| * in inode here, because we can't hold it across the trans_reserve. |
| * If the IDs do change before we take the ilock, we're covered |
| * because the i_*dquot fields will get updated anyway. |
| */ |
| if (XFS_IS_QUOTA_ON(mp) && |
| (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID))) { |
| uint qflags = 0; |
| |
| if ((mask & XFS_AT_UID) && XFS_IS_UQUOTA_ON(mp)) { |
| uid = vap->va_uid; |
| qflags |= XFS_QMOPT_UQUOTA; |
| } else { |
| uid = ip->i_d.di_uid; |
| } |
| if ((mask & XFS_AT_GID) && XFS_IS_GQUOTA_ON(mp)) { |
| gid = vap->va_gid; |
| qflags |= XFS_QMOPT_GQUOTA; |
| } else { |
| gid = ip->i_d.di_gid; |
| } |
| if ((mask & XFS_AT_PROJID) && XFS_IS_PQUOTA_ON(mp)) { |
| projid = vap->va_projid; |
| qflags |= XFS_QMOPT_PQUOTA; |
| } else { |
| projid = ip->i_d.di_projid; |
| } |
| /* |
| * We take a reference when we initialize udqp and gdqp, |
| * so it is important that we never blindly double trip on |
| * the same variable. See xfs_create() for an example. |
| */ |
| ASSERT(udqp == NULL); |
| ASSERT(gdqp == NULL); |
| code = XFS_QM_DQVOPALLOC(mp, ip, uid, gid, projid, qflags, |
| &udqp, &gdqp); |
| if (code) |
| return code; |
| } |
| |
| /* |
| * For the other attributes, we acquire the inode lock and |
| * first do an error checking pass. |
| */ |
| tp = NULL; |
| lock_flags = XFS_ILOCK_EXCL; |
| if (flags & ATTR_NOLOCK) |
| need_iolock = 0; |
| if (!(mask & XFS_AT_SIZE)) { |
| if ((mask != (XFS_AT_CTIME|XFS_AT_ATIME|XFS_AT_MTIME)) || |
| (mp->m_flags & XFS_MOUNT_WSYNC)) { |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| commit_flags = 0; |
| if ((code = xfs_trans_reserve(tp, 0, |
| XFS_ICHANGE_LOG_RES(mp), 0, |
| 0, 0))) { |
| lock_flags = 0; |
| goto error_return; |
| } |
| } |
| } else { |
| if (DM_EVENT_ENABLED (vp->v_vfsp, ip, DM_EVENT_TRUNCATE) && |
| !(flags & ATTR_DMI)) { |
| int dmflags = AT_DELAY_FLAG(flags) | DM_SEM_FLAG_WR; |
| code = XFS_SEND_DATA(mp, DM_EVENT_TRUNCATE, vp, |
| vap->va_size, 0, dmflags, NULL); |
| if (code) { |
| lock_flags = 0; |
| goto error_return; |
| } |
| } |
| if (need_iolock) |
| lock_flags |= XFS_IOLOCK_EXCL; |
| } |
| |
| xfs_ilock(ip, lock_flags); |
| |
| /* boolean: are we the file owner? */ |
| file_owner = (current_fsuid(credp) == ip->i_d.di_uid); |
| |
| /* |
| * Change various properties of a file. |
| * Only the owner or users with CAP_FOWNER |
| * capability may do these things. |
| */ |
| if (mask & |
| (XFS_AT_MODE|XFS_AT_XFLAGS|XFS_AT_EXTSIZE|XFS_AT_UID| |
| XFS_AT_GID|XFS_AT_PROJID)) { |
| /* |
| * CAP_FOWNER overrides the following restrictions: |
| * |
| * The user ID of the calling process must be equal |
| * to the file owner ID, except in cases where the |
| * CAP_FSETID capability is applicable. |
| */ |
| if (!file_owner && !capable(CAP_FOWNER)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| |
| /* |
| * CAP_FSETID overrides the following restrictions: |
| * |
| * The effective user ID of the calling process shall match |
| * the file owner when setting the set-user-ID and |
| * set-group-ID bits on that file. |
| * |
| * The effective group ID or one of the supplementary group |
| * IDs of the calling process shall match the group owner of |
| * the file when setting the set-group-ID bit on that file |
| */ |
| if (mask & XFS_AT_MODE) { |
| mode_t m = 0; |
| |
| if ((vap->va_mode & S_ISUID) && !file_owner) |
| m |= S_ISUID; |
| if ((vap->va_mode & S_ISGID) && |
| !in_group_p((gid_t)ip->i_d.di_gid)) |
| m |= S_ISGID; |
| #if 0 |
| /* Linux allows this, Irix doesn't. */ |
| if ((vap->va_mode & S_ISVTX) && !VN_ISDIR(vp)) |
| m |= S_ISVTX; |
| #endif |
| if (m && !capable(CAP_FSETID)) |
| vap->va_mode &= ~m; |
| } |
| } |
| |
| /* |
| * Change file ownership. Must be the owner or privileged. |
| * If the system was configured with the "restricted_chown" |
| * option, the owner is not permitted to give away the file, |
| * and can change the group id only to a group of which he |
| * or she is a member. |
| */ |
| if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { |
| /* |
| * These IDs could have changed since we last looked at them. |
| * But, we're assured that if the ownership did change |
| * while we didn't have the inode locked, inode's dquot(s) |
| * would have changed also. |
| */ |
| iuid = ip->i_d.di_uid; |
| iprojid = ip->i_d.di_projid; |
| igid = ip->i_d.di_gid; |
| gid = (mask & XFS_AT_GID) ? vap->va_gid : igid; |
| uid = (mask & XFS_AT_UID) ? vap->va_uid : iuid; |
| projid = (mask & XFS_AT_PROJID) ? (xfs_prid_t)vap->va_projid : |
| iprojid; |
| |
| /* |
| * CAP_CHOWN overrides the following restrictions: |
| * |
| * If _POSIX_CHOWN_RESTRICTED is defined, this capability |
| * shall override the restriction that a process cannot |
| * change the user ID of a file it owns and the restriction |
| * that the group ID supplied to the chown() function |
| * shall be equal to either the group ID or one of the |
| * supplementary group IDs of the calling process. |
| */ |
| if (restricted_chown && |
| (iuid != uid || (igid != gid && |
| !in_group_p((gid_t)gid))) && |
| !capable(CAP_CHOWN)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| /* |
| * Do a quota reservation only if uid/projid/gid is actually |
| * going to change. |
| */ |
| if ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || |
| (XFS_IS_PQUOTA_ON(mp) && iprojid != projid) || |
| (XFS_IS_GQUOTA_ON(mp) && igid != gid)) { |
| ASSERT(tp); |
| code = XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, udqp, gdqp, |
| capable(CAP_FOWNER) ? |
| XFS_QMOPT_FORCE_RES : 0); |
| if (code) /* out of quota */ |
| goto error_return; |
| } |
| } |
| |
| /* |
| * Truncate file. Must have write permission and not be a directory. |
| */ |
| if (mask & XFS_AT_SIZE) { |
| /* Short circuit the truncate case for zero length files */ |
| if ((vap->va_size == 0) && |
| (ip->i_d.di_size == 0) && (ip->i_d.di_nextents == 0)) { |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| lock_flags &= ~XFS_ILOCK_EXCL; |
| if (mask & XFS_AT_CTIME) |
| xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| code = 0; |
| goto error_return; |
| } |
| |
| if (VN_ISDIR(vp)) { |
| code = XFS_ERROR(EISDIR); |
| goto error_return; |
| } else if (!VN_ISREG(vp)) { |
| code = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| /* |
| * Make sure that the dquots are attached to the inode. |
| */ |
| if ((code = XFS_QM_DQATTACH(mp, ip, XFS_QMOPT_ILOCKED))) |
| goto error_return; |
| } |
| |
| /* |
| * Change file access or modified times. |
| */ |
| if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { |
| if (!file_owner) { |
| if ((flags & ATTR_UTIME) && |
| !capable(CAP_FOWNER)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| } |
| } |
| |
| /* |
| * Change extent size or realtime flag. |
| */ |
| if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { |
| /* |
| * Can't change extent size if any extents are allocated. |
| */ |
| if (ip->i_d.di_nextents && (mask & XFS_AT_EXTSIZE) && |
| ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
| vap->va_extsize) ) { |
| code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| goto error_return; |
| } |
| |
| /* |
| * Can't change realtime flag if any extents are allocated. |
| */ |
| if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| (mask & XFS_AT_XFLAGS) && |
| (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) != |
| (vap->va_xflags & XFS_XFLAG_REALTIME)) { |
| code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| goto error_return; |
| } |
| /* |
| * Extent size must be a multiple of the appropriate block |
| * size, if set at all. |
| */ |
| if ((mask & XFS_AT_EXTSIZE) && vap->va_extsize != 0) { |
| xfs_extlen_t size; |
| |
| if ((ip->i_d.di_flags & XFS_DIFLAG_REALTIME) || |
| ((mask & XFS_AT_XFLAGS) && |
| (vap->va_xflags & XFS_XFLAG_REALTIME))) { |
| size = mp->m_sb.sb_rextsize << |
| mp->m_sb.sb_blocklog; |
| } else { |
| size = mp->m_sb.sb_blocksize; |
| } |
| if (vap->va_extsize % size) { |
| code = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| } |
| /* |
| * If realtime flag is set then must have realtime data. |
| */ |
| if ((mask & XFS_AT_XFLAGS) && |
| (vap->va_xflags & XFS_XFLAG_REALTIME)) { |
| if ((mp->m_sb.sb_rblocks == 0) || |
| (mp->m_sb.sb_rextsize == 0) || |
| (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { |
| code = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| } |
| |
| /* |
| * Can't modify an immutable/append-only file unless |
| * we have appropriate permission. |
| */ |
| if ((mask & XFS_AT_XFLAGS) && |
| (ip->i_d.di_flags & |
| (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || |
| (vap->va_xflags & |
| (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && |
| !capable(CAP_LINUX_IMMUTABLE)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| } |
| |
| /* |
| * Now we can make the changes. Before we join the inode |
| * to the transaction, if XFS_AT_SIZE is set then take care of |
| * the part of the truncation that must be done without the |
| * inode lock. This needs to be done before joining the inode |
| * to the transaction, because the inode cannot be unlocked |
| * once it is a part of the transaction. |
| */ |
| if (mask & XFS_AT_SIZE) { |
| code = 0; |
| if ((vap->va_size > ip->i_d.di_size) && |
| (flags & ATTR_NOSIZETOK) == 0) { |
| code = xfs_igrow_start(ip, vap->va_size, credp); |
| } |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
| if (!code) |
| code = xfs_itruncate_data(ip, vap->va_size); |
| if (code) { |
| ASSERT(tp == NULL); |
| lock_flags &= ~XFS_ILOCK_EXCL; |
| ASSERT(lock_flags == XFS_IOLOCK_EXCL); |
| goto error_return; |
| } |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |
| if ((code = xfs_trans_reserve(tp, 0, |
| XFS_ITRUNCATE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, |
| XFS_ITRUNCATE_LOG_COUNT))) { |
| xfs_trans_cancel(tp, 0); |
| if (need_iolock) |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return code; |
| } |
| commit_flags = XFS_TRANS_RELEASE_LOG_RES; |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| } |
| |
| if (tp) { |
| xfs_trans_ijoin(tp, ip, lock_flags); |
| xfs_trans_ihold(tp, ip); |
| } |
| |
| /* determine whether mandatory locking mode changes */ |
| mandlock_before = MANDLOCK(vp, ip->i_d.di_mode); |
| |
| /* |
| * Truncate file. Must have write permission and not be a directory. |
| */ |
| if (mask & XFS_AT_SIZE) { |
| if (vap->va_size > ip->i_d.di_size) { |
| xfs_igrow_finish(tp, ip, vap->va_size, |
| !(flags & ATTR_DMI)); |
| } else if ((vap->va_size <= ip->i_d.di_size) || |
| ((vap->va_size == 0) && ip->i_d.di_nextents)) { |
| /* |
| * signal a sync transaction unless |
| * we're truncating an already unlinked |
| * file on a wsync filesystem |
| */ |
| code = xfs_itruncate_finish(&tp, ip, |
| (xfs_fsize_t)vap->va_size, |
| XFS_DATA_FORK, |
| ((ip->i_d.di_nlink != 0 || |
| !(mp->m_flags & XFS_MOUNT_WSYNC)) |
| ? 1 : 0)); |
| if (code) |
| goto abort_return; |
| /* |
| * Truncated "down", so we're removing references |
| * to old data here - if we now delay flushing for |
| * a long time, we expose ourselves unduly to the |
| * notorious NULL files problem. So, we mark this |
| * vnode and flush it when the file is closed, and |
| * do not wait the usual (long) time for writeout. |
| */ |
| VTRUNCATE(vp); |
| } |
| /* |
| * Have to do this even if the file's size doesn't change. |
| */ |
| timeflags |= XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG; |
| } |
| |
| /* |
| * Change file access modes. |
| */ |
| if (mask & XFS_AT_MODE) { |
| ip->i_d.di_mode &= S_IFMT; |
| ip->i_d.di_mode |= vap->va_mode & ~S_IFMT; |
| |
| xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| timeflags |= XFS_ICHGTIME_CHG; |
| } |
| |
| /* |
| * Change file ownership. Must be the owner or privileged. |
| * If the system was configured with the "restricted_chown" |
| * option, the owner is not permitted to give away the file, |
| * and can change the group id only to a group of which he |
| * or she is a member. |
| */ |
| if (mask & (XFS_AT_UID|XFS_AT_GID|XFS_AT_PROJID)) { |
| /* |
| * CAP_FSETID overrides the following restrictions: |
| * |
| * The set-user-ID and set-group-ID bits of a file will be |
| * cleared upon successful return from chown() |
| */ |
| if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| !capable(CAP_FSETID)) { |
| ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| } |
| |
| /* |
| * Change the ownerships and register quota modifications |
| * in the transaction. |
| */ |
| if (iuid != uid) { |
| if (XFS_IS_UQUOTA_ON(mp)) { |
| ASSERT(mask & XFS_AT_UID); |
| ASSERT(udqp); |
| olddquot1 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| &ip->i_udquot, udqp); |
| } |
| ip->i_d.di_uid = uid; |
| } |
| if (igid != gid) { |
| if (XFS_IS_GQUOTA_ON(mp)) { |
| ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
| ASSERT(mask & XFS_AT_GID); |
| ASSERT(gdqp); |
| olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| &ip->i_gdquot, gdqp); |
| } |
| ip->i_d.di_gid = gid; |
| } |
| if (iprojid != projid) { |
| if (XFS_IS_PQUOTA_ON(mp)) { |
| ASSERT(!XFS_IS_GQUOTA_ON(mp)); |
| ASSERT(mask & XFS_AT_PROJID); |
| ASSERT(gdqp); |
| olddquot2 = XFS_QM_DQVOPCHOWN(mp, tp, ip, |
| &ip->i_gdquot, gdqp); |
| } |
| ip->i_d.di_projid = projid; |
| /* |
| * We may have to rev the inode as well as |
| * the superblock version number since projids didn't |
| * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. |
| */ |
| if (ip->i_d.di_version == XFS_DINODE_VERSION_1) |
| xfs_bump_ino_vers2(tp, ip); |
| } |
| |
| xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| timeflags |= XFS_ICHGTIME_CHG; |
| } |
| |
| |
| /* |
| * Change file access or modified times. |
| */ |
| if (mask & (XFS_AT_ATIME|XFS_AT_MTIME)) { |
| if (mask & XFS_AT_ATIME) { |
| ip->i_d.di_atime.t_sec = vap->va_atime.tv_sec; |
| ip->i_d.di_atime.t_nsec = vap->va_atime.tv_nsec; |
| ip->i_update_core = 1; |
| timeflags &= ~XFS_ICHGTIME_ACC; |
| } |
| if (mask & XFS_AT_MTIME) { |
| ip->i_d.di_mtime.t_sec = vap->va_mtime.tv_sec; |
| ip->i_d.di_mtime.t_nsec = vap->va_mtime.tv_nsec; |
| timeflags &= ~XFS_ICHGTIME_MOD; |
| timeflags |= XFS_ICHGTIME_CHG; |
| } |
| if (tp && (flags & ATTR_UTIME)) |
| xfs_trans_log_inode (tp, ip, XFS_ILOG_CORE); |
| } |
| |
| /* |
| * Change XFS-added attributes. |
| */ |
| if (mask & (XFS_AT_EXTSIZE|XFS_AT_XFLAGS)) { |
| if (mask & XFS_AT_EXTSIZE) { |
| /* |
| * Converting bytes to fs blocks. |
| */ |
| ip->i_d.di_extsize = vap->va_extsize >> |
| mp->m_sb.sb_blocklog; |
| } |
| if (mask & XFS_AT_XFLAGS) { |
| uint di_flags; |
| |
| /* can't set PREALLOC this way, just preserve it */ |
| di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| if (vap->va_xflags & XFS_XFLAG_IMMUTABLE) |
| di_flags |= XFS_DIFLAG_IMMUTABLE; |
| if (vap->va_xflags & XFS_XFLAG_APPEND) |
| di_flags |= XFS_DIFLAG_APPEND; |
| if (vap->va_xflags & XFS_XFLAG_SYNC) |
| di_flags |= XFS_DIFLAG_SYNC; |
| if (vap->va_xflags & XFS_XFLAG_NOATIME) |
| di_flags |= XFS_DIFLAG_NOATIME; |
| if (vap->va_xflags & XFS_XFLAG_NODUMP) |
| di_flags |= XFS_DIFLAG_NODUMP; |
| if (vap->va_xflags & XFS_XFLAG_PROJINHERIT) |
| di_flags |= XFS_DIFLAG_PROJINHERIT; |
| if (vap->va_xflags & XFS_XFLAG_NODEFRAG) |
| di_flags |= XFS_DIFLAG_NODEFRAG; |
| if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| if (vap->va_xflags & XFS_XFLAG_RTINHERIT) |
| di_flags |= XFS_DIFLAG_RTINHERIT; |
| if (vap->va_xflags & XFS_XFLAG_NOSYMLINKS) |
| di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| if (vap->va_xflags & XFS_XFLAG_EXTSZINHERIT) |
| di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { |
| if (vap->va_xflags & XFS_XFLAG_REALTIME) { |
| di_flags |= XFS_DIFLAG_REALTIME; |
| ip->i_iocore.io_flags |= XFS_IOCORE_RT; |
| } else { |
| ip->i_iocore.io_flags &= ~XFS_IOCORE_RT; |
| } |
| if (vap->va_xflags & XFS_XFLAG_EXTSIZE) |
| di_flags |= XFS_DIFLAG_EXTSIZE; |
| } |
| ip->i_d.di_flags = di_flags; |
| } |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| timeflags |= XFS_ICHGTIME_CHG; |
| } |
| |
| /* |
| * Change file inode change time only if XFS_AT_CTIME set |
| * AND we have been called by a DMI function. |
| */ |
| |
| if ( (flags & ATTR_DMI) && (mask & XFS_AT_CTIME) ) { |
| ip->i_d.di_ctime.t_sec = vap->va_ctime.tv_sec; |
| ip->i_d.di_ctime.t_nsec = vap->va_ctime.tv_nsec; |
| ip->i_update_core = 1; |
| timeflags &= ~XFS_ICHGTIME_CHG; |
| } |
| |
| /* |
| * Send out timestamp changes that need to be set to the |
| * current time. Not done when called by a DMI function. |
| */ |
| if (timeflags && !(flags & ATTR_DMI)) |
| xfs_ichgtime(ip, timeflags); |
| |
| XFS_STATS_INC(xs_ig_attrchg); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * transaction goes to disk before returning to the user. |
| * This is slightly sub-optimal in that truncates require |
| * two sync transactions instead of one for wsync filesystems. |
| * One for the truncate and one for the timestamps since we |
| * don't want to change the timestamps unless we're sure the |
| * truncate worked. Truncates are less than 1% of the laddis |
| * mix so this probably isn't worth the trouble to optimize. |
| */ |
| code = 0; |
| if (tp) { |
| if (mp->m_flags & XFS_MOUNT_WSYNC) |
| xfs_trans_set_sync(tp); |
| |
| code = xfs_trans_commit(tp, commit_flags, NULL); |
| } |
| |
| /* |
| * If the (regular) file's mandatory locking mode changed, then |
| * notify the vnode. We do this under the inode lock to prevent |
| * racing calls to vop_vnode_change. |
| */ |
| mandlock_after = MANDLOCK(vp, ip->i_d.di_mode); |
| if (mandlock_before != mandlock_after) { |
| bhv_vop_vnode_change(vp, VCHANGE_FLAGS_ENF_LOCKING, |
| mandlock_after); |
| } |
| |
| xfs_iunlock(ip, lock_flags); |
| |
| /* |
| * Release any dquot(s) the inode had kept before chown. |
| */ |
| XFS_QM_DQRELE(mp, olddquot1); |
| XFS_QM_DQRELE(mp, olddquot2); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| if (code) { |
| return code; |
| } |
| |
| if (DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_ATTRIBUTE) && |
| !(flags & ATTR_DMI)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_ATTRIBUTE, vp, DM_RIGHT_NULL, |
| NULL, DM_RIGHT_NULL, NULL, NULL, |
| 0, 0, AT_DELAY_FLAG(flags)); |
| } |
| return 0; |
| |
| abort_return: |
| commit_flags |= XFS_TRANS_ABORT; |
| /* FALLTHROUGH */ |
| error_return: |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| if (tp) { |
| xfs_trans_cancel(tp, commit_flags); |
| } |
| if (lock_flags != 0) { |
| xfs_iunlock(ip, lock_flags); |
| } |
| return code; |
| } |
| |
| |
| /* |
| * xfs_access |
| * Null conversion from vnode mode bits to inode mode bits, as in efs. |
| */ |
| STATIC int |
| xfs_access( |
| bhv_desc_t *bdp, |
| int mode, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| int error; |
| |
| vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, |
| (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| error = xfs_iaccess(ip, mode, credp); |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| return error; |
| } |
| |
| |
| /* |
| * The maximum pathlen is 1024 bytes. Since the minimum file system |
| * blocksize is 512 bytes, we can get a max of 2 extents back from |
| * bmapi. |
| */ |
| #define SYMLINK_MAPS 2 |
| |
| /* |
| * xfs_readlink |
| * |
| */ |
| STATIC int |
| xfs_readlink( |
| bhv_desc_t *bdp, |
| uio_t *uiop, |
| int ioflags, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| int count; |
| xfs_off_t offset; |
| int pathlen; |
| bhv_vnode_t *vp; |
| int error = 0; |
| xfs_mount_t *mp; |
| int nmaps; |
| xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| xfs_daddr_t d; |
| int byte_cnt; |
| int n; |
| xfs_buf_t *bp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| |
| ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFLNK); |
| |
| offset = uiop->uio_offset; |
| count = uiop->uio_resid; |
| |
| if (offset < 0) { |
| error = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| if (count <= 0) { |
| error = 0; |
| goto error_return; |
| } |
| |
| /* |
| * See if the symlink is stored inline. |
| */ |
| pathlen = (int)ip->i_d.di_size; |
| |
| if (ip->i_df.if_flags & XFS_IFINLINE) { |
| error = xfs_uio_read(ip->i_df.if_u1.if_data, pathlen, uiop); |
| } |
| else { |
| /* |
| * Symlink not inline. Call bmap to get it in. |
| */ |
| nmaps = SYMLINK_MAPS; |
| |
| error = xfs_bmapi(NULL, ip, 0, XFS_B_TO_FSB(mp, pathlen), |
| 0, NULL, 0, mval, &nmaps, NULL, NULL); |
| |
| if (error) { |
| goto error_return; |
| } |
| |
| for (n = 0; n < nmaps; n++) { |
| d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| bp = xfs_buf_read(mp->m_ddev_targp, d, |
| BTOBB(byte_cnt), 0); |
| error = XFS_BUF_GETERROR(bp); |
| if (error) { |
| xfs_ioerror_alert("xfs_readlink", |
| ip->i_mount, bp, XFS_BUF_ADDR(bp)); |
| xfs_buf_relse(bp); |
| goto error_return; |
| } |
| if (pathlen < byte_cnt) |
| byte_cnt = pathlen; |
| pathlen -= byte_cnt; |
| |
| error = xfs_uio_read(XFS_BUF_PTR(bp), byte_cnt, uiop); |
| xfs_buf_relse (bp); |
| } |
| |
| } |
| |
| error_return: |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| return error; |
| } |
| |
| |
| /* |
| * xfs_fsync |
| * |
| * This is called to sync the inode and its data out to disk. |
| * We need to hold the I/O lock while flushing the data, and |
| * the inode lock while flushing the inode. The inode lock CANNOT |
| * be held while flushing the data, so acquire after we're done |
| * with that. |
| */ |
| STATIC int |
| xfs_fsync( |
| bhv_desc_t *bdp, |
| int flag, |
| cred_t *credp, |
| xfs_off_t start, |
| xfs_off_t stop) |
| { |
| xfs_inode_t *ip; |
| xfs_trans_t *tp; |
| int error; |
| int log_flushed = 0, changed = 1; |
| |
| vn_trace_entry(BHV_TO_VNODE(bdp), |
| __FUNCTION__, (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| |
| ASSERT(start >= 0 && stop >= -1); |
| |
| if (XFS_FORCED_SHUTDOWN(ip->i_mount)) |
| return XFS_ERROR(EIO); |
| |
| /* |
| * We always need to make sure that the required inode state |
| * is safe on disk. The vnode might be clean but because |
| * of committed transactions that haven't hit the disk yet. |
| * Likewise, there could be unflushed non-transactional |
| * changes to the inode core that have to go to disk. |
| * |
| * The following code depends on one assumption: that |
| * any transaction that changes an inode logs the core |
| * because it has to change some field in the inode core |
| * (typically nextents or nblocks). That assumption |
| * implies that any transactions against an inode will |
| * catch any non-transactional updates. If inode-altering |
| * transactions exist that violate this assumption, the |
| * code breaks. Right now, it figures that if the involved |
| * update_* field is clear and the inode is unpinned, the |
| * inode is clean. Either it's been flushed or it's been |
| * committed and the commit has hit the disk unpinning the inode. |
| * (Note that xfs_inode_item_format() called at commit clears |
| * the update_* fields.) |
| */ |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| |
| /* If we are flushing data then we care about update_size |
| * being set, otherwise we care about update_core |
| */ |
| if ((flag & FSYNC_DATA) ? |
| (ip->i_update_size == 0) : |
| (ip->i_update_core == 0)) { |
| /* |
| * Timestamps/size haven't changed since last inode |
| * flush or inode transaction commit. That means |
| * either nothing got written or a transaction |
| * committed which caught the updates. If the |
| * latter happened and the transaction hasn't |
| * hit the disk yet, the inode will be still |
| * be pinned. If it is, force the log. |
| */ |
| |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| |
| if (xfs_ipincount(ip)) { |
| _xfs_log_force(ip->i_mount, (xfs_lsn_t)0, |
| XFS_LOG_FORCE | |
| ((flag & FSYNC_WAIT) |
| ? XFS_LOG_SYNC : 0), |
| &log_flushed); |
| } else { |
| /* |
| * If the inode is not pinned and nothing |
| * has changed we don't need to flush the |
| * cache. |
| */ |
| changed = 0; |
| } |
| error = 0; |
| } else { |
| /* |
| * Kick off a transaction to log the inode |
| * core to get the updates. Make it |
| * sync if FSYNC_WAIT is passed in (which |
| * is done by everybody but specfs). The |
| * sync transaction will also force the log. |
| */ |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| tp = xfs_trans_alloc(ip->i_mount, XFS_TRANS_FSYNC_TS); |
| if ((error = xfs_trans_reserve(tp, 0, |
| XFS_FSYNC_TS_LOG_RES(ip->i_mount), |
| 0, 0, 0))) { |
| xfs_trans_cancel(tp, 0); |
| 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); |
| if (flag & FSYNC_WAIT) |
| xfs_trans_set_sync(tp); |
| error = _xfs_trans_commit(tp, 0, NULL, &log_flushed); |
| |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| } |
| |
| if ((ip->i_mount->m_flags & XFS_MOUNT_BARRIER) && changed) { |
| /* |
| * If the log write didn't issue an ordered tag we need |
| * to flush the disk cache for the data device now. |
| */ |
| if (!log_flushed) |
| xfs_blkdev_issue_flush(ip->i_mount->m_ddev_targp); |
| |
| /* |
| * If this inode is on the RT dev we need to flush that |
| * cache as well. |
| */ |
| if (ip->i_d.di_flags & XFS_DIFLAG_REALTIME) |
| xfs_blkdev_issue_flush(ip->i_mount->m_rtdev_targp); |
| } |
| |
| return error; |
| } |
| |
| /* |
| * This is called by xfs_inactive to free any blocks beyond eof, |
| * when the link count isn't zero. |
| */ |
| STATIC int |
| xfs_inactive_free_eofblocks( |
| xfs_mount_t *mp, |
| xfs_inode_t *ip) |
| { |
| xfs_trans_t *tp; |
| int error; |
| xfs_fileoff_t end_fsb; |
| xfs_fileoff_t last_fsb; |
| xfs_filblks_t map_len; |
| int nimaps; |
| xfs_bmbt_irec_t imap; |
| |
| /* |
| * Figure out if there are any blocks beyond the end |
| * of the file. If not, then there is nothing to do. |
| */ |
| end_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)ip->i_d.di_size)); |
| last_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_MAXIOFFSET(mp)); |
| map_len = last_fsb - end_fsb; |
| if (map_len <= 0) |
| return 0; |
| |
| nimaps = 1; |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| error = XFS_BMAPI(mp, NULL, &ip->i_iocore, end_fsb, map_len, 0, |
| NULL, 0, &imap, &nimaps, NULL, NULL); |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| |
| if (!error && (nimaps != 0) && |
| (imap.br_startblock != HOLESTARTBLOCK || |
| ip->i_delayed_blks)) { |
| /* |
| * Attach the dquots to the inode up front. |
| */ |
| if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| return error; |
| |
| /* |
| * There are blocks after the end of file. |
| * Free them up now by truncating the file to |
| * its current size. |
| */ |
| tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| |
| /* |
| * Do the xfs_itruncate_start() call before |
| * reserving any log space because |
| * itruncate_start will call into the buffer |
| * cache and we can't |
| * do that within a transaction. |
| */ |
| xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, |
| ip->i_d.di_size); |
| |
| error = xfs_trans_reserve(tp, 0, |
| XFS_ITRUNCATE_LOG_RES(mp), |
| 0, XFS_TRANS_PERM_LOG_RES, |
| XFS_ITRUNCATE_LOG_COUNT); |
| if (error) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return error; |
| } |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, |
| XFS_IOLOCK_EXCL | |
| XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| |
| error = xfs_itruncate_finish(&tp, ip, |
| ip->i_d.di_size, |
| XFS_DATA_FORK, |
| 0); |
| /* |
| * If we get an error at this point we |
| * simply don't bother truncating the file. |
| */ |
| if (error) { |
| xfs_trans_cancel(tp, |
| (XFS_TRANS_RELEASE_LOG_RES | |
| XFS_TRANS_ABORT)); |
| } else { |
| error = xfs_trans_commit(tp, |
| XFS_TRANS_RELEASE_LOG_RES, |
| NULL); |
| } |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| } |
| return error; |
| } |
| |
| /* |
| * Free a symlink that has blocks associated with it. |
| */ |
| STATIC int |
| xfs_inactive_symlink_rmt( |
| xfs_inode_t *ip, |
| xfs_trans_t **tpp) |
| { |
| xfs_buf_t *bp; |
| int committed; |
| int done; |
| int error; |
| xfs_fsblock_t first_block; |
| xfs_bmap_free_t free_list; |
| int i; |
| xfs_mount_t *mp; |
| xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| int nmaps; |
| xfs_trans_t *ntp; |
| int size; |
| xfs_trans_t *tp; |
| |
| tp = *tpp; |
| mp = ip->i_mount; |
| ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip)); |
| /* |
| * We're freeing a symlink that has some |
| * blocks allocated to it. Free the |
| * blocks here. We know that we've got |
| * either 1 or 2 extents and that we can |
| * free them all in one bunmapi call. |
| */ |
| ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2); |
| if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| *tpp = NULL; |
| return error; |
| } |
| /* |
| * Lock the inode, fix the size, and join it to the transaction. |
| * Hold it so in the normal path, we still have it locked for |
| * the second transaction. In the error paths we need it |
| * held so the cancel won't rele it, see below. |
| */ |
| xfs_ilock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| size = (int)ip->i_d.di_size; |
| ip->i_d.di_size = 0; |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| /* |
| * Find the block(s) so we can inval and unmap them. |
| */ |
| done = 0; |
| XFS_BMAP_INIT(&free_list, &first_block); |
| nmaps = ARRAY_SIZE(mval); |
| if ((error = xfs_bmapi(tp, ip, 0, XFS_B_TO_FSB(mp, size), |
| XFS_BMAPI_METADATA, &first_block, 0, mval, &nmaps, |
| &free_list, NULL))) |
| goto error0; |
| /* |
| * Invalidate the block(s). |
| */ |
| for (i = 0; i < nmaps; i++) { |
| bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, |
| XFS_FSB_TO_DADDR(mp, mval[i].br_startblock), |
| XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0); |
| xfs_trans_binval(tp, bp); |
| } |
| /* |
| * Unmap the dead block(s) to the free_list. |
| */ |
| if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps, |
| &first_block, &free_list, NULL, &done))) |
| goto error1; |
| ASSERT(done); |
| /* |
| * Commit the first transaction. This logs the EFI and the inode. |
| */ |
| if ((error = xfs_bmap_finish(&tp, &free_list, first_block, &committed))) |
| goto error1; |
| /* |
| * The transaction must have been committed, since there were |
| * actually extents freed by xfs_bunmapi. See xfs_bmap_finish. |
| * The new tp has the extent freeing and EFDs. |
| */ |
| ASSERT(committed); |
| /* |
| * The first xact was committed, so add the inode to the new one. |
| * Mark it dirty so it will be logged and moved forward in the log as |
| * part of every commit. |
| */ |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| /* |
| * Get a new, empty transaction to return to our caller. |
| */ |
| ntp = xfs_trans_dup(tp); |
| /* |
| * Commit the transaction containing extent freeing and EFDs. |
| * If we get an error on the commit here or on the reserve below, |
| * we need to unlock the inode since the new transaction doesn't |
| * have the inode attached. |
| */ |
| error = xfs_trans_commit(tp, 0, NULL); |
| tp = ntp; |
| if (error) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| goto error0; |
| } |
| /* |
| * Remove the memory for extent descriptions (just bookkeeping). |
| */ |
| if (ip->i_df.if_bytes) |
| xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK); |
| ASSERT(ip->i_df.if_bytes == 0); |
| /* |
| * Put an itruncate log reservation in the new transaction |
| * for our caller. |
| */ |
| if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| goto error0; |
| } |
| /* |
| * Return with the inode locked but not joined to the transaction. |
| */ |
| *tpp = tp; |
| return 0; |
| |
| error1: |
| xfs_bmap_cancel(&free_list); |
| error0: |
| /* |
| * Have to come here with the inode locked and either |
| * (held and in the transaction) or (not in the transaction). |
| * If the inode isn't held then cancel would iput it, but |
| * that's wrong since this is inactive and the vnode ref |
| * count is 0 already. |
| * Cancel won't do anything to the inode if held, but it still |
| * needs to be locked until the cancel is done, if it was |
| * joined to the transaction. |
| */ |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| *tpp = NULL; |
| return error; |
| |
| } |
| |
| STATIC int |
| xfs_inactive_symlink_local( |
| xfs_inode_t *ip, |
| xfs_trans_t **tpp) |
| { |
| int error; |
| |
| ASSERT(ip->i_d.di_size <= XFS_IFORK_DSIZE(ip)); |
| /* |
| * We're freeing a symlink which fit into |
| * the inode. Just free the memory used |
| * to hold the old symlink. |
| */ |
| error = xfs_trans_reserve(*tpp, 0, |
| XFS_ITRUNCATE_LOG_RES(ip->i_mount), |
| 0, XFS_TRANS_PERM_LOG_RES, |
| XFS_ITRUNCATE_LOG_COUNT); |
| |
| if (error) { |
| xfs_trans_cancel(*tpp, 0); |
| *tpp = NULL; |
| return error; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| |
| /* |
| * Zero length symlinks _can_ exist. |
| */ |
| if (ip->i_df.if_bytes > 0) { |
| xfs_idata_realloc(ip, |
| -(ip->i_df.if_bytes), |
| XFS_DATA_FORK); |
| ASSERT(ip->i_df.if_bytes == 0); |
| } |
| return 0; |
| } |
| |
| STATIC int |
| xfs_inactive_attrs( |
| xfs_inode_t *ip, |
| xfs_trans_t **tpp) |
| { |
| xfs_trans_t *tp; |
| int error; |
| xfs_mount_t *mp; |
| |
| ASSERT(ismrlocked(&ip->i_iolock, MR_UPDATE)); |
| tp = *tpp; |
| mp = ip->i_mount; |
| ASSERT(ip->i_d.di_forkoff != 0); |
| xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| |
| error = xfs_attr_inactive(ip); |
| if (error) { |
| *tpp = NULL; |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return error; /* goto out */ |
| } |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| error = xfs_trans_reserve(tp, 0, |
| XFS_IFREE_LOG_RES(mp), |
| 0, XFS_TRANS_PERM_LOG_RES, |
| XFS_INACTIVE_LOG_COUNT); |
| if (error) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| *tpp = NULL; |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return error; |
| } |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| |
| ASSERT(ip->i_d.di_anextents == 0); |
| |
| *tpp = tp; |
| return 0; |
| } |
| |
| STATIC int |
| xfs_release( |
| bhv_desc_t *bdp) |
| { |
| xfs_inode_t *ip; |
| bhv_vnode_t *vp; |
| xfs_mount_t *mp; |
| int error; |
| |
| vp = BHV_TO_VNODE(bdp); |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| if (!VN_ISREG(vp) || (ip->i_d.di_mode == 0)) |
| return 0; |
| |
| /* If this is a read-only mount, don't do this (would generate I/O) */ |
| if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| return 0; |
| |
| #ifdef HAVE_REFCACHE |
| /* If we are in the NFS reference cache then don't do this now */ |
| if (ip->i_refcache) |
| return 0; |
| #endif |
| |
| if (ip->i_d.di_nlink != 0) { |
| if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && |
| ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 || |
| ip->i_delayed_blks > 0)) && |
| (ip->i_df.if_flags & XFS_IFEXTENTS)) && |
| (!(ip->i_d.di_flags & |
| (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { |
| if ((error = xfs_inactive_free_eofblocks(mp, ip))) |
| return error; |
| /* Update linux inode block count after free above */ |
| vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
| ip->i_d.di_nblocks + ip->i_delayed_blks); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * xfs_inactive |
| * |
| * This is called when the vnode reference count for the vnode |
| * goes to zero. If the file has been unlinked, then it must |
| * now be truncated. Also, we clear all of the read-ahead state |
| * kept for the inode here since the file is now closed. |
| */ |
| STATIC int |
| xfs_inactive( |
| bhv_desc_t *bdp, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| bhv_vnode_t *vp; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| int committed; |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| int error; |
| int truncate; |
| |
| vp = BHV_TO_VNODE(bdp); |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| |
| /* |
| * If the inode is already free, then there can be nothing |
| * to clean up here. |
| */ |
| if (ip->i_d.di_mode == 0 || VN_BAD(vp)) { |
| ASSERT(ip->i_df.if_real_bytes == 0); |
| ASSERT(ip->i_df.if_broot_bytes == 0); |
| return VN_INACTIVE_CACHE; |
| } |
| |
| /* |
| * Only do a truncate if it's a regular file with |
| * some actual space in it. It's OK to look at the |
| * inode's fields without the lock because we're the |
| * only one with a reference to the inode. |
| */ |
| truncate = ((ip->i_d.di_nlink == 0) && |
| ((ip->i_d.di_size != 0) || (ip->i_d.di_nextents > 0) || |
| (ip->i_delayed_blks > 0)) && |
| ((ip->i_d.di_mode & S_IFMT) == S_IFREG)); |
| |
| mp = ip->i_mount; |
| |
| if (ip->i_d.di_nlink == 0 && |
| DM_EVENT_ENABLED(vp->v_vfsp, ip, DM_EVENT_DESTROY)) { |
| (void) XFS_SEND_DESTROY(mp, vp, DM_RIGHT_NULL); |
| } |
| |
| error = 0; |
| |
| /* If this is a read-only mount, don't do this (would generate I/O) */ |
| if (vp->v_vfsp->vfs_flag & VFS_RDONLY) |
| goto out; |
| |
| if (ip->i_d.di_nlink != 0) { |
| if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && |
| ((ip->i_d.di_size > 0) || (VN_CACHED(vp) > 0 || |
| ip->i_delayed_blks > 0)) && |
| (ip->i_df.if_flags & XFS_IFEXTENTS) && |
| (!(ip->i_d.di_flags & |
| (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) || |
| (ip->i_delayed_blks != 0)))) { |
| if ((error = xfs_inactive_free_eofblocks(mp, ip))) |
| return VN_INACTIVE_CACHE; |
| /* Update linux inode block count after free above */ |
| vn_to_inode(vp)->i_blocks = XFS_FSB_TO_BB(mp, |
| ip->i_d.di_nblocks + ip->i_delayed_blks); |
| } |
| goto out; |
| } |
| |
| ASSERT(ip->i_d.di_nlink == 0); |
| |
| if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| return VN_INACTIVE_CACHE; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE); |
| if (truncate) { |
| /* |
| * Do the xfs_itruncate_start() call before |
| * reserving any log space because itruncate_start |
| * will call into the buffer cache and we can't |
| * do that within a transaction. |
| */ |
| xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| |
| xfs_itruncate_start(ip, XFS_ITRUNC_DEFINITE, 0); |
| |
| error = xfs_trans_reserve(tp, 0, |
| XFS_ITRUNCATE_LOG_RES(mp), |
| 0, XFS_TRANS_PERM_LOG_RES, |
| XFS_ITRUNCATE_LOG_COUNT); |
| if (error) { |
| /* Don't call itruncate_cleanup */ |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return VN_INACTIVE_CACHE; |
| } |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| |
| /* |
| * normally, we have to run xfs_itruncate_finish sync. |
| * But if filesystem is wsync and we're in the inactive |
| * path, then we know that nlink == 0, and that the |
| * xaction that made nlink == 0 is permanently committed |
| * since xfs_remove runs as a synchronous transaction. |
| */ |
| error = xfs_itruncate_finish(&tp, ip, 0, XFS_DATA_FORK, |
| (!(mp->m_flags & XFS_MOUNT_WSYNC) ? 1 : 0)); |
| |
| if (error) { |
| xfs_trans_cancel(tp, |
| XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| return VN_INACTIVE_CACHE; |
| } |
| } else if ((ip->i_d.di_mode & S_IFMT) == S_IFLNK) { |
| |
| /* |
| * If we get an error while cleaning up a |
| * symlink we bail out. |
| */ |
| error = (ip->i_d.di_size > XFS_IFORK_DSIZE(ip)) ? |
| xfs_inactive_symlink_rmt(ip, &tp) : |
| xfs_inactive_symlink_local(ip, &tp); |
| |
| if (error) { |
| ASSERT(tp == NULL); |
| return VN_INACTIVE_CACHE; |
| } |
| |
| xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| } else { |
| error = xfs_trans_reserve(tp, 0, |
| XFS_IFREE_LOG_RES(mp), |
| 0, XFS_TRANS_PERM_LOG_RES, |
| XFS_INACTIVE_LOG_COUNT); |
| if (error) { |
| ASSERT(XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| return VN_INACTIVE_CACHE; |
| } |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| } |
| |
| /* |
| * If there are attributes associated with the file |
| * then blow them away now. The code calls a routine |
| * that recursively deconstructs the attribute fork. |
| * We need to just commit the current transaction |
| * because we can't use it for xfs_attr_inactive(). |
| */ |
| if (ip->i_d.di_anextents > 0) { |
| error = xfs_inactive_attrs(ip, &tp); |
| /* |
| * If we got an error, the transaction is already |
| * cancelled, and the inode is unlocked. Just get out. |
| */ |
| if (error) |
| return VN_INACTIVE_CACHE; |
| } else if (ip->i_afp) { |
| xfs_idestroy_fork(ip, XFS_ATTR_FORK); |
| } |
| |
| /* |
| * Free the inode. |
| */ |
| XFS_BMAP_INIT(&free_list, &first_block); |
| error = xfs_ifree(tp, ip, &free_list); |
| if (error) { |
| /* |
| * If we fail to free the inode, shut down. The cancel |
| * might do that, we need to make sure. Otherwise the |
| * inode might be lost for a long time or forever. |
| */ |
| if (!XFS_FORCED_SHUTDOWN(mp)) { |
| cmn_err(CE_NOTE, |
| "xfs_inactive: xfs_ifree() returned an error = %d on %s", |
| error, mp->m_fsname); |
| xfs_force_shutdown(mp, SHUTDOWN_META_IO_ERROR); |
| } |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT); |
| } else { |
| /* |
| * Credit the quota account(s). The inode is gone. |
| */ |
| XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, XFS_TRANS_DQ_ICOUNT, -1); |
| |
| /* |
| * Just ignore errors at this point. There is |
| * nothing we can do except to try to keep going. |
| */ |
| (void) xfs_bmap_finish(&tp, &free_list, first_block, |
| &committed); |
| (void) xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| } |
| /* |
| * Release the dquots held by inode, if any. |
| */ |
| XFS_QM_DQDETACH(mp, ip); |
| |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL | XFS_ILOCK_EXCL); |
| |
| out: |
| return VN_INACTIVE_CACHE; |
| } |
| |
| |
| /* |
| * xfs_lookup |
| */ |
| STATIC int |
| xfs_lookup( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| bhv_vnode_t **vpp, |
| int flags, |
| bhv_vnode_t *rdir, |
| cred_t *credp) |
| { |
| xfs_inode_t *dp, *ip; |
| xfs_ino_t e_inum; |
| int error; |
| uint lock_mode; |
| bhv_vnode_t *dir_vp; |
| |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| dp = XFS_BHVTOI(dir_bdp); |
| |
| if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| return XFS_ERROR(EIO); |
| |
| lock_mode = xfs_ilock_map_shared(dp); |
| error = xfs_dir_lookup_int(dir_bdp, lock_mode, dentry, &e_inum, &ip); |
| if (!error) { |
| *vpp = XFS_ITOV(ip); |
| ITRACE(ip); |
| } |
| xfs_iunlock_map_shared(dp, lock_mode); |
| return error; |
| } |
| |
| |
| /* |
| * xfs_create (create a new file). |
| */ |
| STATIC int |
| xfs_create( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| bhv_vattr_t *vap, |
| bhv_vnode_t **vpp, |
| cred_t *credp) |
| { |
| char *name = VNAME(dentry); |
| bhv_vnode_t *dir_vp; |
| xfs_inode_t *dp, *ip; |
| bhv_vnode_t *vp = NULL; |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| xfs_dev_t rdev; |
| int error; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| boolean_t dp_joined_to_trans; |
| int dm_event_sent = 0; |
| uint cancel_flags; |
| int committed; |
| xfs_prid_t prid; |
| struct xfs_dquot *udqp, *gdqp; |
| uint resblks; |
| int dm_di_mode; |
| int namelen; |
| |
| ASSERT(!*vpp); |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| dp = XFS_BHVTOI(dir_bdp); |
| mp = dp->i_mount; |
| |
| dm_di_mode = vap->va_mode; |
| namelen = VNAMELEN(dentry); |
| |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
| dir_vp, DM_RIGHT_NULL, NULL, |
| DM_RIGHT_NULL, name, NULL, |
| dm_di_mode, 0, 0); |
| |
| if (error) |
| return error; |
| dm_event_sent = 1; |
| } |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| /* Return through std_return after this point. */ |
| |
| udqp = gdqp = NULL; |
| if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| prid = dp->i_d.di_projid; |
| else if (vap->va_mask & XFS_AT_PROJID) |
| prid = (xfs_prid_t)vap->va_projid; |
| else |
| prid = (xfs_prid_t)dfltprid; |
| |
| /* |
| * Make sure that we have allocated dquot(s) on disk. |
| */ |
| error = XFS_QM_DQVOPALLOC(mp, dp, |
| current_fsuid(credp), current_fsgid(credp), prid, |
| XFS_QMOPT_QUOTALL|XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| if (error) |
| goto std_return; |
| |
| ip = NULL; |
| dp_joined_to_trans = B_FALSE; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_CREATE); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| resblks = XFS_CREATE_SPACE_RES(mp, namelen); |
| /* |
| * Initially assume that the file does not exist and |
| * reserve the resources for that case. If that is not |
| * the case we'll drop the one we have and get a more |
| * appropriate transaction later. |
| */ |
| error = xfs_trans_reserve(tp, resblks, XFS_CREATE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); |
| if (error == ENOSPC) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_CREATE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_CREATE_LOG_COUNT); |
| } |
| if (error) { |
| cancel_flags = 0; |
| dp = NULL; |
| goto error_return; |
| } |
| |
| xfs_ilock(dp, XFS_ILOCK_EXCL); |
| |
| XFS_BMAP_INIT(&free_list, &first_block); |
| |
| ASSERT(ip == NULL); |
| |
| /* |
| * Reserve disk quota and the inode. |
| */ |
| error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| if (error) |
| goto error_return; |
| |
| if (resblks == 0 && (error = xfs_dir_canenter(tp, dp, name, namelen))) |
| goto error_return; |
| rdev = (vap->va_mask & XFS_AT_RDEV) ? vap->va_rdev : 0; |
| error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 1, |
| rdev, credp, prid, resblks > 0, |
| &ip, &committed); |
| if (error) { |
| if (error == ENOSPC) |
| goto error_return; |
| goto abort_return; |
| } |
| ITRACE(ip); |
| |
| /* |
| * At this point, we've gotten a newly allocated inode. |
| * It is locked (and joined to the transaction). |
| */ |
| |
| ASSERT(ismrlocked (&ip->i_lock, MR_UPDATE)); |
| |
| /* |
| * Now we join the directory inode to the transaction. |
| * We do not do it earlier because xfs_dir_ialloc |
| * might commit the previous transaction (and release |
| * all the locks). |
| */ |
| |
| VN_HOLD(dir_vp); |
| xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| dp_joined_to_trans = B_TRUE; |
| |
| error = xfs_dir_createname(tp, dp, name, namelen, ip->i_ino, |
| &first_block, &free_list, resblks ? |
| resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
| if (error) { |
| ASSERT(error != ENOSPC); |
| goto abort_return; |
| } |
| xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * create transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| dp->i_gen++; |
| |
| /* |
| * Attach the dquot(s) to the inodes and modify them incore. |
| * These ids of the inode couldn't have changed since the new |
| * inode has been locked ever since it was created. |
| */ |
| XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); |
| |
| /* |
| * xfs_trans_commit normally decrements the vnode ref count |
| * when it unlocks the inode. Since we want to return the |
| * vnode to the caller, we bump the vnode ref count now. |
| */ |
| IHOLD(ip); |
| vp = XFS_ITOV(ip); |
| |
| error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| if (error) { |
| xfs_bmap_cancel(&free_list); |
| goto abort_rele; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| if (error) { |
| IRELE(ip); |
| tp = NULL; |
| goto error_return; |
| } |
| |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| /* |
| * Propagate the fact that the vnode changed after the |
| * xfs_inode locks have been released. |
| */ |
| bhv_vop_vnode_change(vp, VCHANGE_FLAGS_TRUNCATED, 3); |
| |
| *vpp = vp; |
| |
| /* Fallthrough to std_return with error = 0 */ |
| |
| std_return: |
| if ( (*vpp || (error != 0 && dm_event_sent != 0)) && |
| DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| DM_EVENT_POSTCREATE)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
| dir_vp, DM_RIGHT_NULL, |
| *vpp ? vp:NULL, |
| DM_RIGHT_NULL, name, NULL, |
| dm_di_mode, error, 0); |
| } |
| return error; |
| |
| abort_return: |
| cancel_flags |= XFS_TRANS_ABORT; |
| /* FALLTHROUGH */ |
| |
| error_return: |
| if (tp != NULL) |
| xfs_trans_cancel(tp, cancel_flags); |
| |
| if (!dp_joined_to_trans && (dp != NULL)) |
| xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| goto std_return; |
| |
| abort_rele: |
| /* |
| * Wait until after the current transaction is aborted to |
| * release the inode. This prevents recursive transactions |
| * and deadlocks from xfs_inactive. |
| */ |
| cancel_flags |= XFS_TRANS_ABORT; |
| xfs_trans_cancel(tp, cancel_flags); |
| IRELE(ip); |
| |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| goto std_return; |
| } |
| |
| #ifdef DEBUG |
| /* |
| * Some counters to see if (and how often) we are hitting some deadlock |
| * prevention code paths. |
| */ |
| |
| int xfs_rm_locks; |
| int xfs_rm_lock_delays; |
| int xfs_rm_attempts; |
| #endif |
| |
| /* |
| * The following routine will lock the inodes associated with the |
| * directory and the named entry in the directory. The locks are |
| * acquired in increasing inode number. |
| * |
| * If the entry is "..", then only the directory is locked. The |
| * vnode ref count will still include that from the .. entry in |
| * this case. |
| * |
| * There is a deadlock we need to worry about. If the locked directory is |
| * in the AIL, it might be blocking up the log. The next inode we lock |
| * could be already locked by another thread waiting for log space (e.g |
| * a permanent log reservation with a long running transaction (see |
| * xfs_itruncate_finish)). To solve this, we must check if the directory |
| * is in the ail and use lock_nowait. If we can't lock, we need to |
| * drop the inode lock on the directory and try again. xfs_iunlock will |
| * potentially push the tail if we were holding up the log. |
| */ |
| STATIC int |
| xfs_lock_dir_and_entry( |
| xfs_inode_t *dp, |
| bhv_vname_t *dentry, |
| xfs_inode_t *ip) /* inode of entry 'name' */ |
| { |
| int attempts; |
| xfs_ino_t e_inum; |
| xfs_inode_t *ips[2]; |
| xfs_log_item_t *lp; |
| |
| #ifdef DEBUG |
| xfs_rm_locks++; |
| #endif |
| attempts = 0; |
| |
| again: |
| xfs_ilock(dp, XFS_ILOCK_EXCL); |
| |
| e_inum = ip->i_ino; |
| |
| ITRACE(ip); |
| |
| /* |
| * We want to lock in increasing inum. Since we've already |
| * acquired the lock on the directory, we may need to release |
| * if if the inum of the entry turns out to be less. |
| */ |
| if (e_inum > dp->i_ino) { |
| /* |
| * We are already in the right order, so just |
| * lock on the inode of the entry. |
| * We need to use nowait if dp is in the AIL. |
| */ |
| |
| lp = (xfs_log_item_t *)dp->i_itemp; |
| if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| if (!xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { |
| attempts++; |
| #ifdef DEBUG |
| xfs_rm_attempts++; |
| #endif |
| |
| /* |
| * Unlock dp and try again. |
| * xfs_iunlock will try to push the tail |
| * if the inode is in the AIL. |
| */ |
| |
| xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| |
| if ((attempts % 5) == 0) { |
| delay(1); /* Don't just spin the CPU */ |
| #ifdef DEBUG |
| xfs_rm_lock_delays++; |
| #endif |
| } |
| goto again; |
| } |
| } else { |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| } |
| } else if (e_inum < dp->i_ino) { |
| xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| |
| ips[0] = ip; |
| ips[1] = dp; |
| xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); |
| } |
| /* else e_inum == dp->i_ino */ |
| /* This can happen if we're asked to lock /x/.. |
| * the entry is "..", which is also the parent directory. |
| */ |
| |
| return 0; |
| } |
| |
| #ifdef DEBUG |
| int xfs_locked_n; |
| int xfs_small_retries; |
| int xfs_middle_retries; |
| int xfs_lots_retries; |
| int xfs_lock_delays; |
| #endif |
| |
| /* |
| * The following routine will lock n inodes in exclusive mode. |
| * We assume the caller calls us with the inodes in i_ino order. |
| * |
| * We need to detect deadlock where an inode that we lock |
| * is in the AIL and we start waiting for another inode that is locked |
| * by a thread in a long running transaction (such as truncate). This can |
| * result in deadlock since the long running trans might need to wait |
| * for the inode we just locked in order to push the tail and free space |
| * in the log. |
| */ |
| void |
| xfs_lock_inodes( |
| xfs_inode_t **ips, |
| int inodes, |
| int first_locked, |
| uint lock_mode) |
| { |
| int attempts = 0, i, j, try_lock; |
| xfs_log_item_t *lp; |
| |
| ASSERT(ips && (inodes >= 2)); /* we need at least two */ |
| |
| if (first_locked) { |
| try_lock = 1; |
| i = 1; |
| } else { |
| try_lock = 0; |
| i = 0; |
| } |
| |
| again: |
| for (; i < inodes; i++) { |
| ASSERT(ips[i]); |
| |
| if (i && (ips[i] == ips[i-1])) /* Already locked */ |
| continue; |
| |
| /* |
| * If try_lock is not set yet, make sure all locked inodes |
| * are not in the AIL. |
| * If any are, set try_lock to be used later. |
| */ |
| |
| if (!try_lock) { |
| for (j = (i - 1); j >= 0 && !try_lock; j--) { |
| lp = (xfs_log_item_t *)ips[j]->i_itemp; |
| if (lp && (lp->li_flags & XFS_LI_IN_AIL)) { |
| try_lock++; |
| } |
| } |
| } |
| |
| /* |
| * If any of the previous locks we have locked is in the AIL, |
| * we must TRY to get the second and subsequent locks. If |
| * we can't get any, we must release all we have |
| * and try again. |
| */ |
| |
| if (try_lock) { |
| /* try_lock must be 0 if i is 0. */ |
| /* |
| * try_lock means we have an inode locked |
| * that is in the AIL. |
| */ |
| ASSERT(i != 0); |
| if (!xfs_ilock_nowait(ips[i], lock_mode)) { |
| attempts++; |
| |
| /* |
| * Unlock all previous guys and try again. |
| * xfs_iunlock will try to push the tail |
| * if the inode is in the AIL. |
| */ |
| |
| for(j = i - 1; j >= 0; j--) { |
| |
| /* |
| * Check to see if we've already |
| * unlocked this one. |
| * Not the first one going back, |
| * and the inode ptr is the same. |
| */ |
| if ((j != (i - 1)) && ips[j] == |
| ips[j+1]) |
| continue; |
| |
| xfs_iunlock(ips[j], lock_mode); |
| } |
| |
| if ((attempts % 5) == 0) { |
| delay(1); /* Don't just spin the CPU */ |
| #ifdef DEBUG |
| xfs_lock_delays++; |
| #endif |
| } |
| i = 0; |
| try_lock = 0; |
| goto again; |
| } |
| } else { |
| xfs_ilock(ips[i], lock_mode); |
| } |
| } |
| |
| #ifdef DEBUG |
| if (attempts) { |
| if (attempts < 5) xfs_small_retries++; |
| else if (attempts < 100) xfs_middle_retries++; |
| else xfs_lots_retries++; |
| } else { |
| xfs_locked_n++; |
| } |
| #endif |
| } |
| |
| #ifdef DEBUG |
| #define REMOVE_DEBUG_TRACE(x) {remove_which_error_return = (x);} |
| int remove_which_error_return = 0; |
| #else /* ! DEBUG */ |
| #define REMOVE_DEBUG_TRACE(x) |
| #endif /* ! DEBUG */ |
| |
| |
| /* |
| * xfs_remove |
| * |
| */ |
| STATIC int |
| xfs_remove( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| cred_t *credp) |
| { |
| bhv_vnode_t *dir_vp; |
| char *name = VNAME(dentry); |
| xfs_inode_t *dp, *ip; |
| xfs_trans_t *tp = NULL; |
| xfs_mount_t *mp; |
| int error = 0; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| int cancel_flags; |
| int committed; |
| int dm_di_mode = 0; |
| int link_zero; |
| uint resblks; |
| int namelen; |
| |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| dp = XFS_BHVTOI(dir_bdp); |
| mp = dp->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| namelen = VNAMELEN(dentry); |
| |
| if (!xfs_get_dir_entry(dentry, &ip)) { |
| dm_di_mode = ip->i_d.di_mode; |
| IRELE(ip); |
| } |
| |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, dir_vp, |
| DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
| name, NULL, dm_di_mode, 0, 0); |
| if (error) |
| return error; |
| } |
| |
| /* From this point on, return through std_return */ |
| ip = NULL; |
| |
| /* |
| * We need to get a reference to ip before we get our log |
| * reservation. The reason for this is that we cannot call |
| * xfs_iget for an inode for which we do not have a reference |
| * once we've acquired a log reservation. This is because the |
| * inode we are trying to get might be in xfs_inactive going |
| * for a log reservation. Since we'll have to wait for the |
| * inactive code to complete before returning from xfs_iget, |
| * we need to make sure that we don't have log space reserved |
| * when we call xfs_iget. Instead we get an unlocked reference |
| * to the inode before getting our log reservation. |
| */ |
| error = xfs_get_dir_entry(dentry, &ip); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto std_return; |
| } |
| |
| dm_di_mode = ip->i_d.di_mode; |
| |
| vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
| |
| ITRACE(ip); |
| |
| error = XFS_QM_DQATTACH(mp, dp, 0); |
| if (!error && dp != ip) |
| error = XFS_QM_DQATTACH(mp, ip, 0); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| IRELE(ip); |
| goto std_return; |
| } |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_REMOVE); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| /* |
| * We try to get the real space reservation first, |
| * allowing for directory btree deletion(s) implying |
| * possible bmap insert(s). If we can't get the space |
| * reservation then we use 0 instead, and avoid the bmap |
| * btree insert(s) in the directory code by, if the bmap |
| * insert tries to happen, instead trimming the LAST |
| * block from the directory. |
| */ |
| resblks = XFS_REMOVE_SPACE_RES(mp); |
| error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); |
| if (error == ENOSPC) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_REMOVE_LOG_COUNT); |
| } |
| if (error) { |
| ASSERT(error != ENOSPC); |
| REMOVE_DEBUG_TRACE(__LINE__); |
| xfs_trans_cancel(tp, 0); |
| IRELE(ip); |
| return error; |
| } |
| |
| error = xfs_lock_dir_and_entry(dp, dentry, ip); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| xfs_trans_cancel(tp, cancel_flags); |
| IRELE(ip); |
| goto std_return; |
| } |
| |
| /* |
| * At this point, we've gotten both the directory and the entry |
| * inodes locked. |
| */ |
| xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| if (dp != ip) { |
| /* |
| * Increment vnode ref count only in this case since |
| * there's an extra vnode reference in the case where |
| * dp == ip. |
| */ |
| IHOLD(dp); |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| } |
| |
| /* |
| * Entry must exist since we did a lookup in xfs_lock_dir_and_entry. |
| */ |
| XFS_BMAP_INIT(&free_list, &first_block); |
| error = xfs_dir_removename(tp, dp, name, namelen, ip->i_ino, |
| &first_block, &free_list, 0); |
| if (error) { |
| ASSERT(error != ENOENT); |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto error1; |
| } |
| xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| |
| dp->i_gen++; |
| xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| |
| error = xfs_droplink(tp, ip); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto error1; |
| } |
| |
| /* Determine if this is the last link while |
| * we are in the transaction. |
| */ |
| link_zero = (ip)->i_d.di_nlink==0; |
| |
| /* |
| * Take an extra ref on the inode so that it doesn't |
| * go to xfs_inactive() from within the commit. |
| */ |
| IHOLD(ip); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * remove transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto error_rele; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| if (error) { |
| IRELE(ip); |
| goto std_return; |
| } |
| |
| /* |
| * Before we drop our extra reference to the inode, purge it |
| * from the refcache if it is there. By waiting until afterwards |
| * to do the IRELE, we ensure that we won't go inactive in the |
| * xfs_refcache_purge_ip routine (although that would be OK). |
| */ |
| xfs_refcache_purge_ip(ip); |
| |
| vn_trace_exit(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
| |
| /* |
| * Let interposed file systems know about removed links. |
| */ |
| bhv_vop_link_removed(XFS_ITOV(ip), dir_vp, link_zero); |
| |
| IRELE(ip); |
| |
| /* Fall through to std_return with error = 0 */ |
| std_return: |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, |
| DM_EVENT_POSTREMOVE)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, |
| dir_vp, DM_RIGHT_NULL, |
| NULL, DM_RIGHT_NULL, |
| name, NULL, dm_di_mode, error, 0); |
| } |
| return error; |
| |
| error1: |
| xfs_bmap_cancel(&free_list); |
| cancel_flags |= XFS_TRANS_ABORT; |
| xfs_trans_cancel(tp, cancel_flags); |
| goto std_return; |
| |
| error_rele: |
| /* |
| * In this case make sure to not release the inode until after |
| * the current transaction is aborted. Releasing it beforehand |
| * can cause us to go to xfs_inactive and start a recursive |
| * transaction which can easily deadlock with the current one. |
| */ |
| xfs_bmap_cancel(&free_list); |
| cancel_flags |= XFS_TRANS_ABORT; |
| xfs_trans_cancel(tp, cancel_flags); |
| |
| /* |
| * Before we drop our extra reference to the inode, purge it |
| * from the refcache if it is there. By waiting until afterwards |
| * to do the IRELE, we ensure that we won't go inactive in the |
| * xfs_refcache_purge_ip routine (although that would be OK). |
| */ |
| xfs_refcache_purge_ip(ip); |
| |
| IRELE(ip); |
| |
| goto std_return; |
| } |
| |
| |
| /* |
| * xfs_link |
| * |
| */ |
| STATIC int |
| xfs_link( |
| bhv_desc_t *target_dir_bdp, |
| bhv_vnode_t *src_vp, |
| bhv_vname_t *dentry, |
| cred_t *credp) |
| { |
| xfs_inode_t *tdp, *sip; |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| xfs_inode_t *ips[2]; |
| int error; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| int cancel_flags; |
| int committed; |
| bhv_vnode_t *target_dir_vp; |
| int resblks; |
| char *target_name = VNAME(dentry); |
| int target_namelen; |
| |
| target_dir_vp = BHV_TO_VNODE(target_dir_bdp); |
| vn_trace_entry(target_dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| vn_trace_entry(src_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| target_namelen = VNAMELEN(dentry); |
| ASSERT(!VN_ISDIR(src_vp)); |
| |
| sip = xfs_vtoi(src_vp); |
| tdp = XFS_BHVTOI(target_dir_bdp); |
| mp = tdp->i_mount; |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| if (DM_EVENT_ENABLED(src_vp->v_vfsp, tdp, DM_EVENT_LINK)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_LINK, |
| target_dir_vp, DM_RIGHT_NULL, |
| src_vp, DM_RIGHT_NULL, |
| target_name, NULL, 0, 0, 0); |
| if (error) |
| return error; |
| } |
| |
| /* Return through std_return after this point. */ |
| |
| error = XFS_QM_DQATTACH(mp, sip, 0); |
| if (!error && sip != tdp) |
| error = XFS_QM_DQATTACH(mp, tdp, 0); |
| if (error) |
| goto std_return; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_LINK); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| resblks = XFS_LINK_SPACE_RES(mp, target_namelen); |
| error = xfs_trans_reserve(tp, resblks, XFS_LINK_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| if (error == ENOSPC) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_LINK_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_LINK_LOG_COUNT); |
| } |
| if (error) { |
| cancel_flags = 0; |
| goto error_return; |
| } |
| |
| if (sip->i_ino < tdp->i_ino) { |
| ips[0] = sip; |
| ips[1] = tdp; |
| } else { |
| ips[0] = tdp; |
| ips[1] = sip; |
| } |
| |
| xfs_lock_inodes(ips, 2, 0, XFS_ILOCK_EXCL); |
| |
| /* |
| * Increment vnode ref counts since xfs_trans_commit & |
| * xfs_trans_cancel will both unlock the inodes and |
| * decrement the associated ref counts. |
| */ |
| VN_HOLD(src_vp); |
| VN_HOLD(target_dir_vp); |
| xfs_trans_ijoin(tp, sip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, tdp, XFS_ILOCK_EXCL); |
| |
| /* |
| * If the source has too many links, we can't make any more to it. |
| */ |
| if (sip->i_d.di_nlink >= XFS_MAXLINK) { |
| error = XFS_ERROR(EMLINK); |
| goto error_return; |
| } |
| |
| /* |
| * If we are using project inheritance, we only allow hard link |
| * creation in our tree when the project IDs are the same; else |
| * the tree quota mechanism could be circumvented. |
| */ |
| if (unlikely((tdp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) && |
| (tdp->i_d.di_projid != sip->i_d.di_projid))) { |
| error = XFS_ERROR(EXDEV); |
| goto error_return; |
| } |
| |
| if (resblks == 0 && |
| (error = xfs_dir_canenter(tp, tdp, target_name, target_namelen))) |
| goto error_return; |
| |
| XFS_BMAP_INIT(&free_list, &first_block); |
| |
| error = xfs_dir_createname(tp, tdp, target_name, target_namelen, |
| sip->i_ino, &first_block, &free_list, |
| resblks); |
| if (error) |
| goto abort_return; |
| xfs_ichgtime(tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| tdp->i_gen++; |
| xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE); |
| |
| error = xfs_bumplink(tp, sip); |
| if (error) |
| goto abort_return; |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * link transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| error = xfs_bmap_finish (&tp, &free_list, first_block, &committed); |
| if (error) { |
| xfs_bmap_cancel(&free_list); |
| goto abort_return; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| if (error) |
| goto std_return; |
| |
| /* Fall through to std_return with error = 0. */ |
| std_return: |
| if (DM_EVENT_ENABLED(src_vp->v_vfsp, sip, |
| DM_EVENT_POSTLINK)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTLINK, |
| target_dir_vp, DM_RIGHT_NULL, |
| src_vp, DM_RIGHT_NULL, |
| target_name, NULL, 0, error, 0); |
| } |
| return error; |
| |
| abort_return: |
| cancel_flags |= XFS_TRANS_ABORT; |
| /* FALLTHROUGH */ |
| |
| error_return: |
| xfs_trans_cancel(tp, cancel_flags); |
| goto std_return; |
| } |
| |
| |
| /* |
| * xfs_mkdir |
| * |
| */ |
| STATIC int |
| xfs_mkdir( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| bhv_vattr_t *vap, |
| bhv_vnode_t **vpp, |
| cred_t *credp) |
| { |
| char *dir_name = VNAME(dentry); |
| xfs_inode_t *dp; |
| xfs_inode_t *cdp; /* inode of created dir */ |
| bhv_vnode_t *cvp; /* vnode of created dir */ |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| int cancel_flags; |
| int error; |
| int committed; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| bhv_vnode_t *dir_vp; |
| boolean_t dp_joined_to_trans; |
| boolean_t created = B_FALSE; |
| int dm_event_sent = 0; |
| xfs_prid_t prid; |
| struct xfs_dquot *udqp, *gdqp; |
| uint resblks; |
| int dm_di_mode; |
| int dir_namelen; |
| |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| dp = XFS_BHVTOI(dir_bdp); |
| mp = dp->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| dir_namelen = VNAMELEN(dentry); |
| |
| tp = NULL; |
| dp_joined_to_trans = B_FALSE; |
| dm_di_mode = vap->va_mode; |
| |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_CREATE)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_CREATE, |
| dir_vp, DM_RIGHT_NULL, NULL, |
| DM_RIGHT_NULL, dir_name, NULL, |
| dm_di_mode, 0, 0); |
| if (error) |
| return error; |
| dm_event_sent = 1; |
| } |
| |
| /* Return through std_return after this point. */ |
| |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| mp = dp->i_mount; |
| udqp = gdqp = NULL; |
| if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| prid = dp->i_d.di_projid; |
| else if (vap->va_mask & XFS_AT_PROJID) |
| prid = (xfs_prid_t)vap->va_projid; |
| else |
| prid = (xfs_prid_t)dfltprid; |
| |
| /* |
| * Make sure that we have allocated dquot(s) on disk. |
| */ |
| error = XFS_QM_DQVOPALLOC(mp, dp, |
| current_fsuid(credp), current_fsgid(credp), prid, |
| XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| if (error) |
| goto std_return; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_MKDIR); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| resblks = XFS_MKDIR_SPACE_RES(mp, dir_namelen); |
| error = xfs_trans_reserve(tp, resblks, XFS_MKDIR_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_MKDIR_LOG_COUNT); |
| if (error == ENOSPC) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_MKDIR_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, |
| XFS_MKDIR_LOG_COUNT); |
| } |
| if (error) { |
| cancel_flags = 0; |
| dp = NULL; |
| goto error_return; |
| } |
| |
| xfs_ilock(dp, XFS_ILOCK_EXCL); |
| |
| /* |
| * Check for directory link count overflow. |
| */ |
| if (dp->i_d.di_nlink >= XFS_MAXLINK) { |
| error = XFS_ERROR(EMLINK); |
| goto error_return; |
| } |
| |
| /* |
| * Reserve disk quota and the inode. |
| */ |
| error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| if (error) |
| goto error_return; |
| |
| if (resblks == 0 && |
| (error = xfs_dir_canenter(tp, dp, dir_name, dir_namelen))) |
| goto error_return; |
| /* |
| * create the directory inode. |
| */ |
| error = xfs_dir_ialloc(&tp, dp, vap->va_mode, 2, |
| 0, credp, prid, resblks > 0, |
| &cdp, NULL); |
| if (error) { |
| if (error == ENOSPC) |
| goto error_return; |
| goto abort_return; |
| } |
| ITRACE(cdp); |
| |
| /* |
| * Now we add the directory inode to the transaction. |
| * We waited until now since xfs_dir_ialloc might start |
| * a new transaction. Had we joined the transaction |
| * earlier, the locks might have gotten released. |
| */ |
| VN_HOLD(dir_vp); |
| xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| dp_joined_to_trans = B_TRUE; |
| |
| XFS_BMAP_INIT(&free_list, &first_block); |
| |
| error = xfs_dir_createname(tp, dp, dir_name, dir_namelen, cdp->i_ino, |
| &first_block, &free_list, resblks ? |
| resblks - XFS_IALLOC_SPACE_RES(mp) : 0); |
| if (error) { |
| ASSERT(error != ENOSPC); |
| goto error1; |
| } |
| xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| |
| /* |
| * Bump the in memory version number of the parent directory |
| * so that other processes accessing it will recognize that |
| * the directory has changed. |
| */ |
| dp->i_gen++; |
| |
| error = xfs_dir_init(tp, cdp, dp); |
| if (error) |
| goto error2; |
| |
| cdp->i_gen = 1; |
| error = xfs_bumplink(tp, dp); |
| if (error) |
| goto error2; |
| |
| cvp = XFS_ITOV(cdp); |
| |
| created = B_TRUE; |
| |
| *vpp = cvp; |
| IHOLD(cdp); |
| |
| /* |
| * Attach the dquots to the new inode and modify the icount incore. |
| */ |
| XFS_QM_DQVOPCREATE(mp, tp, cdp, udqp, gdqp); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * mkdir transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| if (error) { |
| IRELE(cdp); |
| goto error2; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| if (error) { |
| IRELE(cdp); |
| } |
| |
| /* Fall through to std_return with error = 0 or errno from |
| * xfs_trans_commit. */ |
| |
| std_return: |
| if ( (created || (error != 0 && dm_event_sent != 0)) && |
| DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| DM_EVENT_POSTCREATE)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTCREATE, |
| dir_vp, DM_RIGHT_NULL, |
| created ? XFS_ITOV(cdp):NULL, |
| DM_RIGHT_NULL, |
| dir_name, NULL, |
| dm_di_mode, error, 0); |
| } |
| return error; |
| |
| error2: |
| error1: |
| xfs_bmap_cancel(&free_list); |
| abort_return: |
| cancel_flags |= XFS_TRANS_ABORT; |
| error_return: |
| xfs_trans_cancel(tp, cancel_flags); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| if (!dp_joined_to_trans && (dp != NULL)) { |
| xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| } |
| |
| goto std_return; |
| } |
| |
| |
| /* |
| * xfs_rmdir |
| * |
| */ |
| STATIC int |
| xfs_rmdir( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| cred_t *credp) |
| { |
| char *name = VNAME(dentry); |
| xfs_inode_t *dp; |
| xfs_inode_t *cdp; /* child directory */ |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| int error; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| int cancel_flags; |
| int committed; |
| bhv_vnode_t *dir_vp; |
| int dm_di_mode = S_IFDIR; |
| int last_cdp_link; |
| int namelen; |
| uint resblks; |
| |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| dp = XFS_BHVTOI(dir_bdp); |
| mp = dp->i_mount; |
| |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| if (XFS_FORCED_SHUTDOWN(XFS_BHVTOI(dir_bdp)->i_mount)) |
| return XFS_ERROR(EIO); |
| namelen = VNAMELEN(dentry); |
| |
| if (!xfs_get_dir_entry(dentry, &cdp)) { |
| dm_di_mode = cdp->i_d.di_mode; |
| IRELE(cdp); |
| } |
| |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_REMOVE)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_REMOVE, |
| dir_vp, DM_RIGHT_NULL, |
| NULL, DM_RIGHT_NULL, |
| name, NULL, dm_di_mode, 0, 0); |
| if (error) |
| return XFS_ERROR(error); |
| } |
| |
| /* Return through std_return after this point. */ |
| |
| cdp = NULL; |
| |
| /* |
| * We need to get a reference to cdp before we get our log |
| * reservation. The reason for this is that we cannot call |
| * xfs_iget for an inode for which we do not have a reference |
| * once we've acquired a log reservation. This is because the |
| * inode we are trying to get might be in xfs_inactive going |
| * for a log reservation. Since we'll have to wait for the |
| * inactive code to complete before returning from xfs_iget, |
| * we need to make sure that we don't have log space reserved |
| * when we call xfs_iget. Instead we get an unlocked reference |
| * to the inode before getting our log reservation. |
| */ |
| error = xfs_get_dir_entry(dentry, &cdp); |
| if (error) { |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto std_return; |
| } |
| mp = dp->i_mount; |
| dm_di_mode = cdp->i_d.di_mode; |
| |
| /* |
| * Get the dquots for the inodes. |
| */ |
| error = XFS_QM_DQATTACH(mp, dp, 0); |
| if (!error && dp != cdp) |
| error = XFS_QM_DQATTACH(mp, cdp, 0); |
| if (error) { |
| IRELE(cdp); |
| REMOVE_DEBUG_TRACE(__LINE__); |
| goto std_return; |
| } |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_RMDIR); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| /* |
| * We try to get the real space reservation first, |
| * allowing for directory btree deletion(s) implying |
| * possible bmap insert(s). If we can't get the space |
| * reservation then we use 0 instead, and avoid the bmap |
| * btree insert(s) in the directory code by, if the bmap |
| * insert tries to happen, instead trimming the LAST |
| * block from the directory. |
| */ |
| resblks = XFS_REMOVE_SPACE_RES(mp); |
| error = xfs_trans_reserve(tp, resblks, XFS_REMOVE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); |
| if (error == ENOSPC) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_REMOVE_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_DEFAULT_LOG_COUNT); |
| } |
| if (error) { |
| ASSERT(error != ENOSPC); |
| cancel_flags = 0; |
| IRELE(cdp); |
| goto error_return; |
| } |
| XFS_BMAP_INIT(&free_list, &first_block); |
| |
| /* |
| * Now lock the child directory inode and the parent directory |
| * inode in the proper order. This will take care of validating |
| * that the directory entry for the child directory inode has |
| * not changed while we were obtaining a log reservation. |
| */ |
| error = xfs_lock_dir_and_entry(dp, dentry, cdp); |
| if (error) { |
| xfs_trans_cancel(tp, cancel_flags); |
| IRELE(cdp); |
| goto std_return; |
| } |
| |
| xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| if (dp != cdp) { |
| /* |
| * Only increment the parent directory vnode count if |
| * we didn't bump it in looking up cdp. The only time |
| * we don't bump it is when we're looking up ".". |
| */ |
| VN_HOLD(dir_vp); |
| } |
| |
| ITRACE(cdp); |
| xfs_trans_ijoin(tp, cdp, XFS_ILOCK_EXCL); |
| |
| ASSERT(cdp->i_d.di_nlink >= 2); |
| if (cdp->i_d.di_nlink != 2) { |
| error = XFS_ERROR(ENOTEMPTY); |
| goto error_return; |
| } |
| if (!xfs_dir_isempty(cdp)) { |
| error = XFS_ERROR(ENOTEMPTY); |
| goto error_return; |
| } |
| |
| error = xfs_dir_removename(tp, dp, name, namelen, cdp->i_ino, |
| &first_block, &free_list, resblks); |
| if (error) |
| goto error1; |
| |
| xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| |
| /* |
| * Bump the in memory generation count on the parent |
| * directory so that other can know that it has changed. |
| */ |
| dp->i_gen++; |
| |
| /* |
| * Drop the link from cdp's "..". |
| */ |
| error = xfs_droplink(tp, dp); |
| if (error) { |
| goto error1; |
| } |
| |
| /* |
| * Drop the link from dp to cdp. |
| */ |
| error = xfs_droplink(tp, cdp); |
| if (error) { |
| goto error1; |
| } |
| |
| /* |
| * Drop the "." link from cdp to self. |
| */ |
| error = xfs_droplink(tp, cdp); |
| if (error) { |
| goto error1; |
| } |
| |
| /* Determine these before committing transaction */ |
| last_cdp_link = (cdp)->i_d.di_nlink==0; |
| |
| /* |
| * Take an extra ref on the child vnode so that it |
| * does not go to xfs_inactive() from within the commit. |
| */ |
| IHOLD(cdp); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * rmdir transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| error = xfs_bmap_finish (&tp, &free_list, first_block, &committed); |
| if (error) { |
| xfs_bmap_cancel(&free_list); |
| xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES | |
| XFS_TRANS_ABORT)); |
| IRELE(cdp); |
| goto std_return; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| if (error) { |
| IRELE(cdp); |
| goto std_return; |
| } |
| |
| |
| /* |
| * Let interposed file systems know about removed links. |
| */ |
| bhv_vop_link_removed(XFS_ITOV(cdp), dir_vp, last_cdp_link); |
| |
| IRELE(cdp); |
| |
| /* Fall through to std_return with error = 0 or the errno |
| * from xfs_trans_commit. */ |
| std_return: |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_POSTREMOVE)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTREMOVE, |
| dir_vp, DM_RIGHT_NULL, |
| NULL, DM_RIGHT_NULL, |
| name, NULL, dm_di_mode, |
| error, 0); |
| } |
| return error; |
| |
| error1: |
| xfs_bmap_cancel(&free_list); |
| cancel_flags |= XFS_TRANS_ABORT; |
| /* FALLTHROUGH */ |
| |
| error_return: |
| xfs_trans_cancel(tp, cancel_flags); |
| goto std_return; |
| } |
| |
| |
| /* |
| * Read dp's entries starting at uiop->uio_offset and translate them into |
| * bufsize bytes worth of struct dirents starting at bufbase. |
| */ |
| STATIC int |
| xfs_readdir( |
| bhv_desc_t *dir_bdp, |
| uio_t *uiop, |
| cred_t *credp, |
| int *eofp) |
| { |
| xfs_inode_t *dp; |
| xfs_trans_t *tp = NULL; |
| int error = 0; |
| uint lock_mode; |
| |
| vn_trace_entry(BHV_TO_VNODE(dir_bdp), __FUNCTION__, |
| (inst_t *)__return_address); |
| dp = XFS_BHVTOI(dir_bdp); |
| |
| if (XFS_FORCED_SHUTDOWN(dp->i_mount)) |
| return XFS_ERROR(EIO); |
| |
| lock_mode = xfs_ilock_map_shared(dp); |
| error = xfs_dir_getdents(tp, dp, uiop, eofp); |
| xfs_iunlock_map_shared(dp, lock_mode); |
| return error; |
| } |
| |
| |
| STATIC int |
| xfs_symlink( |
| bhv_desc_t *dir_bdp, |
| bhv_vname_t *dentry, |
| bhv_vattr_t *vap, |
| char *target_path, |
| bhv_vnode_t **vpp, |
| cred_t *credp) |
| { |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| xfs_inode_t *dp; |
| xfs_inode_t *ip; |
| int error; |
| int pathlen; |
| xfs_bmap_free_t free_list; |
| xfs_fsblock_t first_block; |
| boolean_t dp_joined_to_trans; |
| bhv_vnode_t *dir_vp; |
| uint cancel_flags; |
| int committed; |
| xfs_fileoff_t first_fsb; |
| xfs_filblks_t fs_blocks; |
| int nmaps; |
| xfs_bmbt_irec_t mval[SYMLINK_MAPS]; |
| xfs_daddr_t d; |
| char *cur_chunk; |
| int byte_cnt; |
| int n; |
| xfs_buf_t *bp; |
| xfs_prid_t prid; |
| struct xfs_dquot *udqp, *gdqp; |
| uint resblks; |
| char *link_name = VNAME(dentry); |
| int link_namelen; |
| |
| *vpp = NULL; |
| dir_vp = BHV_TO_VNODE(dir_bdp); |
| dp = XFS_BHVTOI(dir_bdp); |
| dp_joined_to_trans = B_FALSE; |
| error = 0; |
| ip = NULL; |
| tp = NULL; |
| |
| vn_trace_entry(dir_vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| mp = dp->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| link_namelen = VNAMELEN(dentry); |
| |
| /* |
| * Check component lengths of the target path name. |
| */ |
| pathlen = strlen(target_path); |
| if (pathlen >= MAXPATHLEN) /* total string too long */ |
| return XFS_ERROR(ENAMETOOLONG); |
| if (pathlen >= MAXNAMELEN) { /* is any component too long? */ |
| int len, total; |
| char *path; |
| |
| for (total = 0, path = target_path; total < pathlen;) { |
| /* |
| * Skip any slashes. |
| */ |
| while(*path == '/') { |
| total++; |
| path++; |
| } |
| |
| /* |
| * Count up to the next slash or end of path. |
| * Error out if the component is bigger than MAXNAMELEN. |
| */ |
| for(len = 0; *path != '/' && total < pathlen;total++, path++) { |
| if (++len >= MAXNAMELEN) { |
| error = ENAMETOOLONG; |
| return error; |
| } |
| } |
| } |
| } |
| |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, dp, DM_EVENT_SYMLINK)) { |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_SYMLINK, dir_vp, |
| DM_RIGHT_NULL, NULL, DM_RIGHT_NULL, |
| link_name, target_path, 0, 0, 0); |
| if (error) |
| return error; |
| } |
| |
| /* Return through std_return after this point. */ |
| |
| udqp = gdqp = NULL; |
| if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) |
| prid = dp->i_d.di_projid; |
| else if (vap->va_mask & XFS_AT_PROJID) |
| prid = (xfs_prid_t)vap->va_projid; |
| else |
| prid = (xfs_prid_t)dfltprid; |
| |
| /* |
| * Make sure that we have allocated dquot(s) on disk. |
| */ |
| error = XFS_QM_DQVOPALLOC(mp, dp, |
| current_fsuid(credp), current_fsgid(credp), prid, |
| XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp); |
| if (error) |
| goto std_return; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK); |
| cancel_flags = XFS_TRANS_RELEASE_LOG_RES; |
| /* |
| * The symlink will fit into the inode data fork? |
| * There can't be any attributes so we get the whole variable part. |
| */ |
| if (pathlen <= XFS_LITINO(mp)) |
| fs_blocks = 0; |
| else |
| fs_blocks = XFS_B_TO_FSB(mp, pathlen); |
| resblks = XFS_SYMLINK_SPACE_RES(mp, link_namelen, fs_blocks); |
| error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| if (error == ENOSPC && fs_blocks == 0) { |
| resblks = 0; |
| error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0, |
| XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT); |
| } |
| if (error) { |
| cancel_flags = 0; |
| dp = NULL; |
| goto error_return; |
| } |
| |
| xfs_ilock(dp, XFS_ILOCK_EXCL); |
| |
| /* |
| * Check whether the directory allows new symlinks or not. |
| */ |
| if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) { |
| error = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| |
| /* |
| * Reserve disk quota : blocks and inode. |
| */ |
| error = XFS_TRANS_RESERVE_QUOTA(mp, tp, udqp, gdqp, resblks, 1, 0); |
| if (error) |
| goto error_return; |
| |
| /* |
| * Check for ability to enter directory entry, if no space reserved. |
| */ |
| if (resblks == 0 && |
| (error = xfs_dir_canenter(tp, dp, link_name, link_namelen))) |
| goto error_return; |
| /* |
| * Initialize the bmap freelist prior to calling either |
| * bmapi or the directory create code. |
| */ |
| XFS_BMAP_INIT(&free_list, &first_block); |
| |
| /* |
| * Allocate an inode for the symlink. |
| */ |
| error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (vap->va_mode&~S_IFMT), |
| 1, 0, credp, prid, resblks > 0, &ip, NULL); |
| if (error) { |
| if (error == ENOSPC) |
| goto error_return; |
| goto error1; |
| } |
| ITRACE(ip); |
| |
| VN_HOLD(dir_vp); |
| xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL); |
| dp_joined_to_trans = B_TRUE; |
| |
| /* |
| * Also attach the dquot(s) to it, if applicable. |
| */ |
| XFS_QM_DQVOPCREATE(mp, tp, ip, udqp, gdqp); |
| |
| if (resblks) |
| resblks -= XFS_IALLOC_SPACE_RES(mp); |
| /* |
| * If the symlink will fit into the inode, write it inline. |
| */ |
| if (pathlen <= XFS_IFORK_DSIZE(ip)) { |
| xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK); |
| memcpy(ip->i_df.if_u1.if_data, target_path, pathlen); |
| ip->i_d.di_size = pathlen; |
| |
| /* |
| * The inode was initially created in extent format. |
| */ |
| ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT); |
| ip->i_df.if_flags |= XFS_IFINLINE; |
| |
| ip->i_d.di_format = XFS_DINODE_FMT_LOCAL; |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE); |
| |
| } else { |
| first_fsb = 0; |
| nmaps = SYMLINK_MAPS; |
| |
| error = xfs_bmapi(tp, ip, first_fsb, fs_blocks, |
| XFS_BMAPI_WRITE | XFS_BMAPI_METADATA, |
| &first_block, resblks, mval, &nmaps, |
| &free_list, NULL); |
| if (error) { |
| goto error1; |
| } |
| |
| if (resblks) |
| resblks -= fs_blocks; |
| ip->i_d.di_size = pathlen; |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| |
| cur_chunk = target_path; |
| for (n = 0; n < nmaps; n++) { |
| d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock); |
| byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount); |
| bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d, |
| BTOBB(byte_cnt), 0); |
| ASSERT(bp && !XFS_BUF_GETERROR(bp)); |
| if (pathlen < byte_cnt) { |
| byte_cnt = pathlen; |
| } |
| pathlen -= byte_cnt; |
| |
| memcpy(XFS_BUF_PTR(bp), cur_chunk, byte_cnt); |
| cur_chunk += byte_cnt; |
| |
| xfs_trans_log_buf(tp, bp, 0, byte_cnt - 1); |
| } |
| } |
| |
| /* |
| * Create the directory entry for the symlink. |
| */ |
| error = xfs_dir_createname(tp, dp, link_name, link_namelen, ip->i_ino, |
| &first_block, &free_list, resblks); |
| if (error) |
| goto error1; |
| xfs_ichgtime(dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE); |
| |
| /* |
| * Bump the in memory version number of the parent directory |
| * so that other processes accessing it will recognize that |
| * the directory has changed. |
| */ |
| dp->i_gen++; |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * symlink transaction goes to disk before returning to |
| * the user. |
| */ |
| if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) { |
| xfs_trans_set_sync(tp); |
| } |
| |
| /* |
| * xfs_trans_commit normally decrements the vnode ref count |
| * when it unlocks the inode. Since we want to return the |
| * vnode to the caller, we bump the vnode ref count now. |
| */ |
| IHOLD(ip); |
| |
| error = xfs_bmap_finish(&tp, &free_list, first_block, &committed); |
| if (error) { |
| goto error2; |
| } |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| /* Fall through to std_return with error = 0 or errno from |
| * xfs_trans_commit */ |
| std_return: |
| if (DM_EVENT_ENABLED(dir_vp->v_vfsp, XFS_BHVTOI(dir_bdp), |
| DM_EVENT_POSTSYMLINK)) { |
| (void) XFS_SEND_NAMESP(mp, DM_EVENT_POSTSYMLINK, |
| dir_vp, DM_RIGHT_NULL, |
| error ? NULL : XFS_ITOV(ip), |
| DM_RIGHT_NULL, link_name, target_path, |
| 0, error, 0); |
| } |
| |
| if (!error) { |
| bhv_vnode_t *vp; |
| |
| ASSERT(ip); |
| vp = XFS_ITOV(ip); |
| *vpp = vp; |
| } |
| return error; |
| |
| error2: |
| IRELE(ip); |
| error1: |
| xfs_bmap_cancel(&free_list); |
| cancel_flags |= XFS_TRANS_ABORT; |
| error_return: |
| xfs_trans_cancel(tp, cancel_flags); |
| XFS_QM_DQRELE(mp, udqp); |
| XFS_QM_DQRELE(mp, gdqp); |
| |
| if (!dp_joined_to_trans && (dp != NULL)) { |
| xfs_iunlock(dp, XFS_ILOCK_EXCL); |
| } |
| |
| goto std_return; |
| } |
| |
| |
| /* |
| * xfs_fid2 |
| * |
| * A fid routine that takes a pointer to a previously allocated |
| * fid structure (like xfs_fast_fid) but uses a 64 bit inode number. |
| */ |
| STATIC int |
| xfs_fid2( |
| bhv_desc_t *bdp, |
| fid_t *fidp) |
| { |
| xfs_inode_t *ip; |
| xfs_fid2_t *xfid; |
| |
| vn_trace_entry(BHV_TO_VNODE(bdp), __FUNCTION__, |
| (inst_t *)__return_address); |
| ASSERT(sizeof(fid_t) >= sizeof(xfs_fid2_t)); |
| |
| xfid = (xfs_fid2_t *)fidp; |
| ip = XFS_BHVTOI(bdp); |
| xfid->fid_len = sizeof(xfs_fid2_t) - sizeof(xfid->fid_len); |
| xfid->fid_pad = 0; |
| /* |
| * use memcpy because the inode is a long long and there's no |
| * assurance that xfid->fid_ino is properly aligned. |
| */ |
| memcpy(&xfid->fid_ino, &ip->i_ino, sizeof(xfid->fid_ino)); |
| xfid->fid_gen = ip->i_d.di_gen; |
| |
| return 0; |
| } |
| |
| |
| /* |
| * xfs_rwlock |
| */ |
| int |
| xfs_rwlock( |
| bhv_desc_t *bdp, |
| bhv_vrwlock_t locktype) |
| { |
| xfs_inode_t *ip; |
| bhv_vnode_t *vp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| if (VN_ISDIR(vp)) |
| return 1; |
| ip = XFS_BHVTOI(bdp); |
| if (locktype == VRWLOCK_WRITE) { |
| xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| } else if (locktype == VRWLOCK_TRY_READ) { |
| return xfs_ilock_nowait(ip, XFS_IOLOCK_SHARED); |
| } else if (locktype == VRWLOCK_TRY_WRITE) { |
| return xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL); |
| } else { |
| ASSERT((locktype == VRWLOCK_READ) || |
| (locktype == VRWLOCK_WRITE_DIRECT)); |
| xfs_ilock(ip, XFS_IOLOCK_SHARED); |
| } |
| |
| return 1; |
| } |
| |
| |
| /* |
| * xfs_rwunlock |
| */ |
| void |
| xfs_rwunlock( |
| bhv_desc_t *bdp, |
| bhv_vrwlock_t locktype) |
| { |
| xfs_inode_t *ip; |
| bhv_vnode_t *vp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| if (VN_ISDIR(vp)) |
| return; |
| ip = XFS_BHVTOI(bdp); |
| if (locktype == VRWLOCK_WRITE) { |
| /* |
| * In the write case, we may have added a new entry to |
| * the reference cache. This might store a pointer to |
| * an inode to be released in this inode. If it is there, |
| * clear the pointer and release the inode after unlocking |
| * this one. |
| */ |
| xfs_refcache_iunlock(ip, XFS_IOLOCK_EXCL); |
| } else { |
| ASSERT((locktype == VRWLOCK_READ) || |
| (locktype == VRWLOCK_WRITE_DIRECT)); |
| xfs_iunlock(ip, XFS_IOLOCK_SHARED); |
| } |
| return; |
| } |
| |
| STATIC int |
| xfs_inode_flush( |
| bhv_desc_t *bdp, |
| int flags) |
| { |
| xfs_inode_t *ip; |
| xfs_mount_t *mp; |
| xfs_inode_log_item_t *iip; |
| int error = 0; |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| iip = ip->i_itemp; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| /* |
| * Bypass inodes which have already been cleaned by |
| * the inode flush clustering code inside xfs_iflush |
| */ |
| if ((ip->i_update_core == 0) && |
| ((iip == NULL) || !(iip->ili_format.ilf_fields & XFS_ILOG_ALL))) |
| return 0; |
| |
| if (flags & FLUSH_LOG) { |
| if (iip && iip->ili_last_lsn) { |
| xlog_t *log = mp->m_log; |
| xfs_lsn_t sync_lsn; |
| int s, log_flags = XFS_LOG_FORCE; |
| |
| s = GRANT_LOCK(log); |
| sync_lsn = log->l_last_sync_lsn; |
| GRANT_UNLOCK(log, s); |
| |
| if ((XFS_LSN_CMP(iip->ili_last_lsn, sync_lsn) <= 0)) |
| return 0; |
| |
| if (flags & FLUSH_SYNC) |
| log_flags |= XFS_LOG_SYNC; |
| return xfs_log_force(mp, iip->ili_last_lsn, log_flags); |
| } |
| } |
| |
| /* |
| * 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 (flags & FLUSH_INODE) { |
| int flush_flags; |
| |
| if (xfs_ipincount(ip)) |
| return EAGAIN; |
| |
| if (flags & FLUSH_SYNC) { |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| xfs_iflock(ip); |
| } else if (xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { |
| if (xfs_ipincount(ip) || !xfs_iflock_nowait(ip)) { |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| return EAGAIN; |
| } |
| } else { |
| return EAGAIN; |
| } |
| |
| if (flags & FLUSH_SYNC) |
| flush_flags = XFS_IFLUSH_SYNC; |
| else |
| flush_flags = XFS_IFLUSH_ASYNC; |
| |
| error = xfs_iflush(ip, flush_flags); |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| } |
| |
| return error; |
| } |
| |
| int |
| xfs_set_dmattrs ( |
| bhv_desc_t *bdp, |
| u_int evmask, |
| u_int16_t state, |
| cred_t *credp) |
| { |
| xfs_inode_t *ip; |
| xfs_trans_t *tp; |
| xfs_mount_t *mp; |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return XFS_ERROR(EPERM); |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); |
| error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); |
| if (error) { |
| xfs_trans_cancel(tp, 0); |
| return error; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| |
| ip->i_iocore.io_dmevmask = ip->i_d.di_dmevmask = evmask; |
| ip->i_iocore.io_dmstate = ip->i_d.di_dmstate = state; |
| |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| IHOLD(ip); |
| error = xfs_trans_commit(tp, 0, NULL); |
| |
| return error; |
| } |
| |
| STATIC int |
| xfs_reclaim( |
| bhv_desc_t *bdp) |
| { |
| xfs_inode_t *ip; |
| bhv_vnode_t *vp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| ip = XFS_BHVTOI(bdp); |
| |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| ASSERT(!VN_MAPPED(vp)); |
| |
| /* bad inode, get out here ASAP */ |
| if (VN_BAD(vp)) { |
| xfs_ireclaim(ip); |
| return 0; |
| } |
| |
| vn_iowait(vp); |
| |
| ASSERT(XFS_FORCED_SHUTDOWN(ip->i_mount) || ip->i_delayed_blks == 0); |
| |
| /* |
| * Make sure the atime in the XFS inode is correct before freeing the |
| * Linux inode. |
| */ |
| xfs_synchronize_atime(ip); |
| |
| /* |
| * If we have nothing to flush with this inode then complete the |
| * teardown now, otherwise break the link between the xfs inode and the |
| * linux inode and clean up the xfs inode later. This avoids flushing |
| * the inode to disk during the delete operation itself. |
| * |
| * When breaking the link, we need to set the XFS_IRECLAIMABLE flag |
| * first to ensure that xfs_iunpin() will never see an xfs inode |
| * that has a linux inode being reclaimed. Synchronisation is provided |
| * by the i_flags_lock. |
| */ |
| if (!ip->i_update_core && (ip->i_itemp == NULL)) { |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_iflock(ip); |
| return xfs_finish_reclaim(ip, 1, XFS_IFLUSH_DELWRI_ELSE_SYNC); |
| } else { |
| xfs_mount_t *mp = ip->i_mount; |
| |
| /* Protect sync and unpin from us */ |
| XFS_MOUNT_ILOCK(mp); |
| spin_lock(&ip->i_flags_lock); |
| __xfs_iflags_set(ip, XFS_IRECLAIMABLE); |
| vn_bhv_remove(VN_BHV_HEAD(vp), XFS_ITOBHV(ip)); |
| spin_unlock(&ip->i_flags_lock); |
| list_add_tail(&ip->i_reclaim, &mp->m_del_inodes); |
| XFS_MOUNT_IUNLOCK(mp); |
| } |
| return 0; |
| } |
| |
| int |
| xfs_finish_reclaim( |
| xfs_inode_t *ip, |
| int locked, |
| int sync_mode) |
| { |
| xfs_ihash_t *ih = ip->i_hash; |
| bhv_vnode_t *vp = XFS_ITOV_NULL(ip); |
| int error; |
| |
| if (vp && VN_BAD(vp)) |
| goto reclaim; |
| |
| /* The hash lock here protects a thread in xfs_iget_core from |
| * racing with us on linking the inode back with a vnode. |
| * Once we have the XFS_IRECLAIM flag set it will not touch |
| * us. |
| */ |
| write_lock(&ih->ih_lock); |
| spin_lock(&ip->i_flags_lock); |
| if (__xfs_iflags_test(ip, XFS_IRECLAIM) || |
| (!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) && vp == NULL)) { |
| spin_unlock(&ip->i_flags_lock); |
| write_unlock(&ih->ih_lock); |
| if (locked) { |
| xfs_ifunlock(ip); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| } |
| return 1; |
| } |
| __xfs_iflags_set(ip, XFS_IRECLAIM); |
| spin_unlock(&ip->i_flags_lock); |
| write_unlock(&ih->ih_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. |
| */ |
| if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| if (!locked) { |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_iflock(ip); |
| } |
| |
| if (ip->i_update_core || |
| ((ip->i_itemp != NULL) && |
| (ip->i_itemp->ili_format.ilf_fields != 0))) { |
| error = xfs_iflush(ip, sync_mode); |
| /* |
| * If we hit an error, typically because of filesystem |
| * shutdown, we don't need to let vn_reclaim to know |
| * because we're gonna reclaim the inode anyway. |
| */ |
| if (error) { |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| goto reclaim; |
| } |
| xfs_iflock(ip); /* synchronize with xfs_iflush_done */ |
| } |
| |
| ASSERT(ip->i_update_core == 0); |
| ASSERT(ip->i_itemp == NULL || |
| ip->i_itemp->ili_format.ilf_fields == 0); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| } else if (locked) { |
| /* |
| * We are not interested in doing an iflush if we're |
| * in the process of shutting down the filesystem forcibly. |
| * So, just reclaim the inode. |
| */ |
| xfs_ifunlock(ip); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| } |
| |
| reclaim: |
| xfs_ireclaim(ip); |
| return 0; |
| } |
| |
| int |
| xfs_finish_reclaim_all(xfs_mount_t *mp, int noblock) |
| { |
| int purged; |
| xfs_inode_t *ip, *n; |
| int done = 0; |
| |
| while (!done) { |
| purged = 0; |
| XFS_MOUNT_ILOCK(mp); |
| list_for_each_entry_safe(ip, n, &mp->m_del_inodes, i_reclaim) { |
| if (noblock) { |
| if (xfs_ilock_nowait(ip, XFS_ILOCK_EXCL) == 0) |
| continue; |
| if (xfs_ipincount(ip) || |
| !xfs_iflock_nowait(ip)) { |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| continue; |
| } |
| } |
| XFS_MOUNT_IUNLOCK(mp); |
| if (xfs_finish_reclaim(ip, noblock, |
| XFS_IFLUSH_DELWRI_ELSE_ASYNC)) |
| delay(1); |
| purged = 1; |
| break; |
| } |
| |
| done = !purged; |
| } |
| |
| XFS_MOUNT_IUNLOCK(mp); |
| return 0; |
| } |
| |
| /* |
| * xfs_alloc_file_space() |
| * This routine allocates disk space for the given file. |
| * |
| * If alloc_type == 0, this request is for an ALLOCSP type |
| * request which will change the file size. In this case, no |
| * DMAPI event will be generated by the call. A TRUNCATE event |
| * will be generated later by xfs_setattr. |
| * |
| * If alloc_type != 0, this request is for a RESVSP type |
| * request, and a DMAPI DM_EVENT_WRITE will be generated if the |
| * lower block boundary byte address is less than the file's |
| * length. |
| * |
| * RETURNS: |
| * 0 on success |
| * errno on error |
| * |
| */ |
| STATIC int |
| xfs_alloc_file_space( |
| xfs_inode_t *ip, |
| xfs_off_t offset, |
| xfs_off_t len, |
| int alloc_type, |
| int attr_flags) |
| { |
| xfs_mount_t *mp = ip->i_mount; |
| xfs_off_t count; |
| xfs_filblks_t allocated_fsb; |
| xfs_filblks_t allocatesize_fsb; |
| xfs_extlen_t extsz, temp; |
| xfs_fileoff_t startoffset_fsb; |
| xfs_fsblock_t firstfsb; |
| int nimaps; |
| int bmapi_flag; |
| int quota_flag; |
| int rt; |
| xfs_trans_t *tp; |
| xfs_bmbt_irec_t imaps[1], *imapp; |
| xfs_bmap_free_t free_list; |
| uint qblocks, resblks, resrtextents; |
| int committed; |
| int error; |
| |
| vn_trace_entry(XFS_ITOV(ip), __FUNCTION__, (inst_t *)__return_address); |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| rt = XFS_IS_REALTIME_INODE(ip); |
| if (unlikely(rt)) { |
| if (!(extsz = ip->i_d.di_extsize)) |
| extsz = mp->m_sb.sb_rextsize; |
| } else { |
| extsz = ip->i_d.di_extsize; |
| } |
| |
| if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| return error; |
| |
| if (len <= 0) |
| return XFS_ERROR(EINVAL); |
| |
| count = len; |
| error = 0; |
| imapp = &imaps[0]; |
| nimaps = 1; |
| bmapi_flag = XFS_BMAPI_WRITE | (alloc_type ? XFS_BMAPI_PREALLOC : 0); |
| startoffset_fsb = XFS_B_TO_FSBT(mp, offset); |
| allocatesize_fsb = XFS_B_TO_FSB(mp, count); |
| |
| /* Generate a DMAPI event if needed. */ |
| if (alloc_type != 0 && offset < ip->i_d.di_size && |
| (attr_flags&ATTR_DMI) == 0 && |
| DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { |
| xfs_off_t end_dmi_offset; |
| |
| end_dmi_offset = offset+len; |
| if (end_dmi_offset > ip->i_d.di_size) |
| end_dmi_offset = ip->i_d.di_size; |
| error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, XFS_ITOV(ip), |
| offset, end_dmi_offset - offset, |
| 0, NULL); |
| if (error) |
| return error; |
| } |
| |
| /* |
| * Allocate file space until done or until there is an error |
| */ |
| retry: |
| while (allocatesize_fsb && !error) { |
| xfs_fileoff_t s, e; |
| |
| /* |
| * Determine space reservations for data/realtime. |
| */ |
| if (unlikely(extsz)) { |
| s = startoffset_fsb; |
| do_div(s, extsz); |
| s *= extsz; |
| e = startoffset_fsb + allocatesize_fsb; |
| if ((temp = do_mod(startoffset_fsb, extsz))) |
| e += temp; |
| if ((temp = do_mod(e, extsz))) |
| e += extsz - temp; |
| } else { |
| s = 0; |
| e = allocatesize_fsb; |
| } |
| |
| if (unlikely(rt)) { |
| resrtextents = qblocks = (uint)(e - s); |
| resrtextents /= mp->m_sb.sb_rextsize; |
| resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| quota_flag = XFS_QMOPT_RES_RTBLKS; |
| } else { |
| resrtextents = 0; |
| resblks = qblocks = \ |
| XFS_DIOSTRAT_SPACE_RES(mp, (uint)(e - s)); |
| quota_flag = XFS_QMOPT_RES_REGBLKS; |
| } |
| |
| /* |
| * Allocate and setup the transaction. |
| */ |
| tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
| error = xfs_trans_reserve(tp, resblks, |
| XFS_WRITE_LOG_RES(mp), resrtextents, |
| XFS_TRANS_PERM_LOG_RES, |
| XFS_WRITE_LOG_COUNT); |
| /* |
| * Check for running out of space |
| */ |
| if (error) { |
| /* |
| * Free the transaction structure. |
| */ |
| ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| break; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| error = XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, |
| qblocks, 0, quota_flag); |
| if (error) |
| goto error1; |
| |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| |
| /* |
| * Issue the xfs_bmapi() call to allocate the blocks |
| */ |
| XFS_BMAP_INIT(&free_list, &firstfsb); |
| error = XFS_BMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
| allocatesize_fsb, bmapi_flag, |
| &firstfsb, 0, imapp, &nimaps, |
| &free_list, NULL); |
| if (error) { |
| goto error0; |
| } |
| |
| /* |
| * Complete the transaction |
| */ |
| error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed); |
| if (error) { |
| goto error0; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| if (error) { |
| break; |
| } |
| |
| allocated_fsb = imapp->br_blockcount; |
| |
| if (nimaps == 0) { |
| error = XFS_ERROR(ENOSPC); |
| break; |
| } |
| |
| startoffset_fsb += allocated_fsb; |
| allocatesize_fsb -= allocated_fsb; |
| } |
| dmapi_enospc_check: |
| if (error == ENOSPC && (attr_flags&ATTR_DMI) == 0 && |
| DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_NOSPACE)) { |
| |
| error = XFS_SEND_NAMESP(mp, DM_EVENT_NOSPACE, |
| XFS_ITOV(ip), DM_RIGHT_NULL, |
| XFS_ITOV(ip), DM_RIGHT_NULL, |
| NULL, NULL, 0, 0, 0); /* Delay flag intentionally unused */ |
| if (error == 0) |
| goto retry; /* Maybe DMAPI app. has made space */ |
| /* else fall through with error from XFS_SEND_DATA */ |
| } |
| |
| return error; |
| |
| error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ |
| xfs_bmap_cancel(&free_list); |
| XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, qblocks, 0, quota_flag); |
| |
| error1: /* Just cancel transaction */ |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| goto dmapi_enospc_check; |
| } |
| |
| /* |
| * Zero file bytes between startoff and endoff inclusive. |
| * The iolock is held exclusive and no blocks are buffered. |
| */ |
| STATIC int |
| xfs_zero_remaining_bytes( |
| xfs_inode_t *ip, |
| xfs_off_t startoff, |
| xfs_off_t endoff) |
| { |
| xfs_bmbt_irec_t imap; |
| xfs_fileoff_t offset_fsb; |
| xfs_off_t lastoffset; |
| xfs_off_t offset; |
| xfs_buf_t *bp; |
| xfs_mount_t *mp = ip->i_mount; |
| int nimap; |
| int error = 0; |
| |
| bp = xfs_buf_get_noaddr(mp->m_sb.sb_blocksize, |
| ip->i_d.di_flags & XFS_DIFLAG_REALTIME ? |
| mp->m_rtdev_targp : mp->m_ddev_targp); |
| |
| for (offset = startoff; offset <= endoff; offset = lastoffset + 1) { |
| offset_fsb = XFS_B_TO_FSBT(mp, offset); |
| nimap = 1; |
| error = XFS_BMAPI(mp, NULL, &ip->i_iocore, offset_fsb, 1, 0, |
| NULL, 0, &imap, &nimap, NULL, NULL); |
| if (error || nimap < 1) |
| break; |
| ASSERT(imap.br_blockcount >= 1); |
| ASSERT(imap.br_startoff == offset_fsb); |
| lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1; |
| if (lastoffset > endoff) |
| lastoffset = endoff; |
| if (imap.br_startblock == HOLESTARTBLOCK) |
| continue; |
| ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| if (imap.br_state == XFS_EXT_UNWRITTEN) |
| continue; |
| XFS_BUF_UNDONE(bp); |
| XFS_BUF_UNWRITE(bp); |
| XFS_BUF_READ(bp); |
| XFS_BUF_SET_ADDR(bp, XFS_FSB_TO_DB(ip, imap.br_startblock)); |
| xfsbdstrat(mp, bp); |
| if ((error = xfs_iowait(bp))) { |
| xfs_ioerror_alert("xfs_zero_remaining_bytes(read)", |
| mp, bp, XFS_BUF_ADDR(bp)); |
| break; |
| } |
| memset(XFS_BUF_PTR(bp) + |
| (offset - XFS_FSB_TO_B(mp, imap.br_startoff)), |
| 0, lastoffset - offset + 1); |
| XFS_BUF_UNDONE(bp); |
| XFS_BUF_UNREAD(bp); |
| XFS_BUF_WRITE(bp); |
| xfsbdstrat(mp, bp); |
| if ((error = xfs_iowait(bp))) { |
| xfs_ioerror_alert("xfs_zero_remaining_bytes(write)", |
| mp, bp, XFS_BUF_ADDR(bp)); |
| break; |
| } |
| } |
| xfs_buf_free(bp); |
| return error; |
| } |
| |
| /* |
| * xfs_free_file_space() |
| * This routine frees disk space for the given file. |
| * |
| * This routine is only called by xfs_change_file_space |
| * for an UNRESVSP type call. |
| * |
| * RETURNS: |
| * 0 on success |
| * errno on error |
| * |
| */ |
| STATIC int |
| xfs_free_file_space( |
| xfs_inode_t *ip, |
| xfs_off_t offset, |
| xfs_off_t len, |
| int attr_flags) |
| { |
| bhv_vnode_t *vp; |
| int committed; |
| int done; |
| xfs_off_t end_dmi_offset; |
| xfs_fileoff_t endoffset_fsb; |
| int error; |
| xfs_fsblock_t firstfsb; |
| xfs_bmap_free_t free_list; |
| xfs_off_t ilen; |
| xfs_bmbt_irec_t imap; |
| xfs_off_t ioffset; |
| xfs_extlen_t mod=0; |
| xfs_mount_t *mp; |
| int nimap; |
| uint resblks; |
| uint rounding; |
| int rt; |
| xfs_fileoff_t startoffset_fsb; |
| xfs_trans_t *tp; |
| int need_iolock = 1; |
| |
| vp = XFS_ITOV(ip); |
| mp = ip->i_mount; |
| |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| if ((error = XFS_QM_DQATTACH(mp, ip, 0))) |
| return error; |
| |
| error = 0; |
| if (len <= 0) /* if nothing being freed */ |
| return error; |
| rt = (ip->i_d.di_flags & XFS_DIFLAG_REALTIME); |
| startoffset_fsb = XFS_B_TO_FSB(mp, offset); |
| end_dmi_offset = offset + len; |
| endoffset_fsb = XFS_B_TO_FSBT(mp, end_dmi_offset); |
| |
| if (offset < ip->i_d.di_size && |
| (attr_flags & ATTR_DMI) == 0 && |
| DM_EVENT_ENABLED(XFS_MTOVFS(mp), ip, DM_EVENT_WRITE)) { |
| if (end_dmi_offset > ip->i_d.di_size) |
| end_dmi_offset = ip->i_d.di_size; |
| error = XFS_SEND_DATA(mp, DM_EVENT_WRITE, vp, |
| offset, end_dmi_offset - offset, |
| AT_DELAY_FLAG(attr_flags), NULL); |
| if (error) |
| return error; |
| } |
| |
| if (attr_flags & ATTR_NOLOCK) |
| need_iolock = 0; |
| if (need_iolock) { |
| xfs_ilock(ip, XFS_IOLOCK_EXCL); |
| vn_iowait(vp); /* wait for the completion of any pending DIOs */ |
| } |
| |
| rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, NBPP); |
| ilen = len + (offset & (rounding - 1)); |
| ioffset = offset & ~(rounding - 1); |
| if (ilen & (rounding - 1)) |
| ilen = (ilen + rounding) & ~(rounding - 1); |
| |
| if (VN_CACHED(vp) != 0) { |
| xfs_inval_cached_trace(&ip->i_iocore, ioffset, -1, |
| ctooff(offtoct(ioffset)), -1); |
| bhv_vop_flushinval_pages(vp, ctooff(offtoct(ioffset)), |
| -1, FI_REMAPF_LOCKED); |
| } |
| |
| /* |
| * Need to zero the stuff we're not freeing, on disk. |
| * If its a realtime file & can't use unwritten extents then we |
| * actually need to zero the extent edges. Otherwise xfs_bunmapi |
| * will take care of it for us. |
| */ |
| if (rt && !XFS_SB_VERSION_HASEXTFLGBIT(&mp->m_sb)) { |
| nimap = 1; |
| error = XFS_BMAPI(mp, NULL, &ip->i_iocore, startoffset_fsb, |
| 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
| if (error) |
| goto out_unlock_iolock; |
| ASSERT(nimap == 0 || nimap == 1); |
| if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| xfs_daddr_t block; |
| |
| ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| block = imap.br_startblock; |
| mod = do_div(block, mp->m_sb.sb_rextsize); |
| if (mod) |
| startoffset_fsb += mp->m_sb.sb_rextsize - mod; |
| } |
| nimap = 1; |
| error = XFS_BMAPI(mp, NULL, &ip->i_iocore, endoffset_fsb - 1, |
| 1, 0, NULL, 0, &imap, &nimap, NULL, NULL); |
| if (error) |
| goto out_unlock_iolock; |
| ASSERT(nimap == 0 || nimap == 1); |
| if (nimap && imap.br_startblock != HOLESTARTBLOCK) { |
| ASSERT(imap.br_startblock != DELAYSTARTBLOCK); |
| mod++; |
| if (mod && (mod != mp->m_sb.sb_rextsize)) |
| endoffset_fsb -= mod; |
| } |
| } |
| if ((done = (endoffset_fsb <= startoffset_fsb))) |
| /* |
| * One contiguous piece to clear |
| */ |
| error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1); |
| else { |
| /* |
| * Some full blocks, possibly two pieces to clear |
| */ |
| if (offset < XFS_FSB_TO_B(mp, startoffset_fsb)) |
| error = xfs_zero_remaining_bytes(ip, offset, |
| XFS_FSB_TO_B(mp, startoffset_fsb) - 1); |
| if (!error && |
| XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len) |
| error = xfs_zero_remaining_bytes(ip, |
| XFS_FSB_TO_B(mp, endoffset_fsb), |
| offset + len - 1); |
| } |
| |
| /* |
| * free file space until done or until there is an error |
| */ |
| resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0); |
| while (!error && !done) { |
| |
| /* |
| * allocate and setup the transaction |
| */ |
| tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT); |
| error = xfs_trans_reserve(tp, |
| resblks, |
| XFS_WRITE_LOG_RES(mp), |
| 0, |
| XFS_TRANS_PERM_LOG_RES, |
| XFS_WRITE_LOG_COUNT); |
| |
| /* |
| * check for running out of space |
| */ |
| if (error) { |
| /* |
| * Free the transaction structure. |
| */ |
| ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp)); |
| xfs_trans_cancel(tp, 0); |
| break; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| error = XFS_TRANS_RESERVE_QUOTA(mp, tp, |
| ip->i_udquot, ip->i_gdquot, resblks, 0, |
| XFS_QMOPT_RES_REGBLKS); |
| if (error) |
| goto error1; |
| |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| |
| /* |
| * issue the bunmapi() call to free the blocks |
| */ |
| XFS_BMAP_INIT(&free_list, &firstfsb); |
| error = XFS_BUNMAPI(mp, tp, &ip->i_iocore, startoffset_fsb, |
| endoffset_fsb - startoffset_fsb, |
| 0, 2, &firstfsb, &free_list, NULL, &done); |
| if (error) { |
| goto error0; |
| } |
| |
| /* |
| * complete the transaction |
| */ |
| error = xfs_bmap_finish(&tp, &free_list, firstfsb, &committed); |
| if (error) { |
| goto error0; |
| } |
| |
| error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL); |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| } |
| |
| out_unlock_iolock: |
| if (need_iolock) |
| xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| return error; |
| |
| error0: |
| xfs_bmap_cancel(&free_list); |
| error1: |
| xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); |
| xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) : |
| XFS_ILOCK_EXCL); |
| return error; |
| } |
| |
| /* |
| * xfs_change_file_space() |
| * This routine allocates or frees disk space for the given file. |
| * The user specified parameters are checked for alignment and size |
| * limitations. |
| * |
| * RETURNS: |
| * 0 on success |
| * errno on error |
| * |
| */ |
| int |
| xfs_change_file_space( |
| bhv_desc_t *bdp, |
| int cmd, |
| xfs_flock64_t *bf, |
| xfs_off_t offset, |
| cred_t *credp, |
| int attr_flags) |
| { |
| int clrprealloc; |
| int error; |
| xfs_fsize_t fsize; |
| xfs_inode_t *ip; |
| xfs_mount_t *mp; |
| int setprealloc; |
| xfs_off_t startoffset; |
| xfs_off_t llen; |
| xfs_trans_t *tp; |
| bhv_vattr_t va; |
| bhv_vnode_t *vp; |
| |
| vp = BHV_TO_VNODE(bdp); |
| vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
| |
| ip = XFS_BHVTOI(bdp); |
| mp = ip->i_mount; |
| |
| /* |
| * must be a regular file and have write permission |
| */ |
| if (!VN_ISREG(vp)) |
| return XFS_ERROR(EINVAL); |
| |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| |
| if ((error = xfs_iaccess(ip, S_IWUSR, credp))) { |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| return error; |
| } |
| |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| |
| switch (bf->l_whence) { |
| case 0: /*SEEK_SET*/ |
| break; |
| case 1: /*SEEK_CUR*/ |
| bf->l_start += offset; |
| break; |
| case 2: /*SEEK_END*/ |
| bf->l_start += ip->i_d.di_size; |
| break; |
| default: |
| return XFS_ERROR(EINVAL); |
| } |
| |
| llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len; |
| |
| if ( (bf->l_start < 0) |
| || (bf->l_start > XFS_MAXIOFFSET(mp)) |
| || (bf->l_start + llen < 0) |
| || (bf->l_start + llen > XFS_MAXIOFFSET(mp))) |
| return XFS_ERROR(EINVAL); |
| |
| bf->l_whence = 0; |
| |
| startoffset = bf->l_start; |
| fsize = ip->i_d.di_size; |
| |
| /* |
| * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve |
| * file space. |
| * These calls do NOT zero the data space allocated to the file, |
| * nor do they change the file size. |
| * |
| * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file |
| * space. |
| * These calls cause the new file data to be zeroed and the file |
| * size to be changed. |
| */ |
| setprealloc = clrprealloc = 0; |
| |
| switch (cmd) { |
| case XFS_IOC_RESVSP: |
| case XFS_IOC_RESVSP64: |
| error = xfs_alloc_file_space(ip, startoffset, bf->l_len, |
| 1, attr_flags); |
| if (error) |
| return error; |
| setprealloc = 1; |
| break; |
| |
| case XFS_IOC_UNRESVSP: |
| case XFS_IOC_UNRESVSP64: |
| if ((error = xfs_free_file_space(ip, startoffset, bf->l_len, |
| attr_flags))) |
| return error; |
| break; |
| |
| case XFS_IOC_ALLOCSP: |
| case XFS_IOC_ALLOCSP64: |
| case XFS_IOC_FREESP: |
| case XFS_IOC_FREESP64: |
| if (startoffset > fsize) { |
| error = xfs_alloc_file_space(ip, fsize, |
| startoffset - fsize, 0, attr_flags); |
| if (error) |
| break; |
| } |
| |
| va.va_mask = XFS_AT_SIZE; |
| va.va_size = startoffset; |
| |
| error = xfs_setattr(bdp, &va, attr_flags, credp); |
| |
| if (error) |
| return error; |
| |
| clrprealloc = 1; |
| break; |
| |
| default: |
| ASSERT(0); |
| return XFS_ERROR(EINVAL); |
| } |
| |
| /* |
| * update the inode timestamp, mode, and prealloc flag bits |
| */ |
| tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); |
| |
| if ((error = xfs_trans_reserve(tp, 0, XFS_WRITEID_LOG_RES(mp), |
| 0, 0, 0))) { |
| /* ASSERT(0); */ |
| xfs_trans_cancel(tp, 0); |
| return error; |
| } |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| xfs_trans_ihold(tp, ip); |
| |
| if ((attr_flags & ATTR_DMI) == 0) { |
| ip->i_d.di_mode &= ~S_ISUID; |
| |
| /* |
| * Note that we don't have to worry about mandatory |
| * file locking being disabled here because we only |
| * clear the S_ISGID bit if the Group execute bit is |
| * on, but if it was on then mandatory locking wouldn't |
| * have been enabled. |
| */ |
| if (ip->i_d.di_mode & S_IXGRP) |
| ip->i_d.di_mode &= ~S_ISGID; |
| |
| xfs_ichgtime(ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); |
| } |
| if (setprealloc) |
| ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; |
| else if (clrprealloc) |
| ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; |
| |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| xfs_trans_set_sync(tp); |
| |
| error = xfs_trans_commit(tp, 0, NULL); |
| |
| xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| |
| return error; |
| } |
| |
| bhv_vnodeops_t xfs_vnodeops = { |
| BHV_IDENTITY_INIT(VN_BHV_XFS,VNODE_POSITION_XFS), |
| .vop_open = xfs_open, |
| .vop_close = xfs_close, |
| .vop_read = xfs_read, |
| #ifdef HAVE_SENDFILE |
| .vop_sendfile = xfs_sendfile, |
| #endif |
| #ifdef HAVE_SPLICE |
| .vop_splice_read = xfs_splice_read, |
| .vop_splice_write = xfs_splice_write, |
| #endif |
| .vop_write = xfs_write, |
| .vop_ioctl = xfs_ioctl, |
| .vop_getattr = xfs_getattr, |
| .vop_setattr = xfs_setattr, |
| .vop_access = xfs_access, |
| .vop_lookup = xfs_lookup, |
| .vop_create = xfs_create, |
| .vop_remove = xfs_remove, |
| .vop_link = xfs_link, |
| .vop_rename = xfs_rename, |
| .vop_mkdir = xfs_mkdir, |
| .vop_rmdir = xfs_rmdir, |
| .vop_readdir = xfs_readdir, |
| .vop_symlink = xfs_symlink, |
| .vop_readlink = xfs_readlink, |
| .vop_fsync = xfs_fsync, |
| .vop_inactive = xfs_inactive, |
| .vop_fid2 = xfs_fid2, |
| .vop_rwlock = xfs_rwlock, |
| .vop_rwunlock = xfs_rwunlock, |
| .vop_bmap = xfs_bmap, |
| .vop_reclaim = xfs_reclaim, |
| .vop_attr_get = xfs_attr_get, |
| .vop_attr_set = xfs_attr_set, |
| .vop_attr_remove = xfs_attr_remove, |
| .vop_attr_list = xfs_attr_list, |
| .vop_link_removed = (vop_link_removed_t)fs_noval, |
| .vop_vnode_change = (vop_vnode_change_t)fs_noval, |
| .vop_tosspages = fs_tosspages, |
| .vop_flushinval_pages = fs_flushinval_pages, |
| .vop_flush_pages = fs_flush_pages, |
| .vop_release = xfs_release, |
| .vop_iflush = xfs_inode_flush, |
| }; |
