/* ARGSUSED7 */ int /* ERRNO if error, 0 if successful. */ sam_create_ino( sam_node_t *pip, /* pointer to parent directory inode. */ char *cp, /* pointer to the component name to create. */ vattr_t *vap, /* vattr ptr for type & mode information. */ vcexcl_t ex, /* exclusive create flag. */ int mode, /* file mode information. */ vnode_t **vpp, /* pointer pointer to returned vnode. */ cred_t *credp, /* credentials pointer. */ int filemode) /* open file mode */ { int error = 0; sam_node_t *ip; struct sam_name name; /* If no entry, slot info is returned here */ int trans_size; int issync; int truncflag = 0; int terr = 0; #ifdef LQFS_TODO_LOCKFS struct ulockfs *ulp; #endif /* LQFS_TODO_LOCKFS */ /* * Cannot set sticky bit unless superuser. */ if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(credp)) { vap->va_mode &= ~VSVTX; } lookup_name: #ifdef LQFS_TODO_LOCKFS error = qfs_lockfs_begin(pip->mp, &ulp, ULOCKFS_CREATE_MASK); if (error) { return (error); } if (ulp) { #endif /* LQFS_TODO_LOCKFS */ /* Start LQFS create transaction */ trans_size = (int)TOP_CREATE_SIZE(pip); TRANS_BEGIN_CSYNC(pip->mp, issync, TOP_CREATE, trans_size); #ifdef LQFS_TODO_LOCKFS } #endif /* LQFS_TODO_LOCKFS */ RW_LOCK_OS(&pip->data_rwl, RW_WRITER); name.operation = SAM_CREATE; if ((error = sam_lookup_name(pip, cp, &ip, &name, credp)) == ENOENT) { if (((error = sam_create_name(pip, cp, &ip, &name, vap, credp)) != 0) && IS_SAM_ENOSPC(error)) { RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER); /* * Temporarily end LQFS create transaction */ #ifdef LQFS_TODO_LOCKFS if (ulp) { #endif /* LQFS_TODO_LOCKFS */ TRANS_END_CSYNC(pip->mp, terr, issync, TOP_CREATE, trans_size); #ifdef LQFS_TODO_LOCKFS } #endif /* LQFS_TODO_LOCKFS */ error = sam_wait_space(pip, error); if (error == 0) { error = terr; } if (error) { return (error); } goto lookup_name; } RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER); } else if (error == 0) { /* If entry already exists. */ RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER); error = EEXIST; if (ex == NONEXCL) { /* If non-exclusive create */ if ((S_ISDIR(ip->di.mode) || S_ISATTRDIR(ip->di.mode)) && (mode & S_IWRITE)) { /* Cannot create over an existing dir. */ error = EISDIR; } else if (SAM_PRIVILEGE_INO(ip->di.version, ip->di.id.ino)) { /* Cannot create over privileged inodes */ error = EPERM; } else if (mode) { /* Check mode if set */ error = sam_access_ino(ip, mode, FALSE, credp); } else { error = 0; } if ((error == 0) && S_ISREG(ip->di.mode) && (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { /* * If logging, do the truncate after the * LQFS create transaction is logged. */ if (TRANS_ISTRANS(ip->mp)) { truncflag++; } else { RW_LOCK_OS(&ip->inode_rwl, RW_WRITER); error = sam_clear_file(ip, 0, STALE_ARCHIVE, credp); RW_UNLOCK_OS(&ip->inode_rwl, RW_WRITER); } if (error == 0) { VNEVENT_CREATE_OS(SAM_ITOV(ip), NULL); } } } /* * Cannot do the following as it caused a stale of * offline copies. */ #if 0 if ((error == 0) && ((mode & O_CREAT) == 0)) { TRANS_INODE(ip->mp, ip); sam_mark_ino(ip, SAM_UPDATED|SAM_CHANGED); } #endif if (error) { VN_RELE(SAM_ITOV(ip)); /* Decrement v_count if error */ } } else { RW_UNLOCK_OS(&pip->data_rwl, RW_WRITER); } #ifdef LQFS_TODO_LOCKFS if (ulp) { #endif /* LQFS_TODO_LOCKFS */ TRANS_END_CSYNC(pip->mp, terr, issync, TOP_CREATE, trans_size); /* * If we haven't had a more interesting failure * already, then anything that might've happened * here should be reported. */ if (error == 0) { error = terr; } #ifdef LQFS_TODO_LOCKFS } #endif /* LQFS_TODO_LOCKFS */ if (!error && truncflag) { (void) TRANS_ITRUNC(ip, (u_offset_t)0, STALE_ARCHIVE, credp); } #ifdef LQFS_TODO_LOCKFS if (ulp) { qfs_lockfs_end(ulp); } #endif /* LQFS_TODO_LOCKFS */ if (error == 0) { *vpp = SAM_ITOV(ip); TRACE(T_SAM_CREATE_RET, SAM_ITOV(pip), (sam_tr_t)* vpp, ip->di.id.ino, error); } return (error); }
/* * ufs_alloc_data - supports allocating space and reads or writes * that involve changes to file length or space allocation. * * This function is more expensive, because of the UFS log transaction, * so ufs_rdwr_data() should be used when space or file length changes * will not occur. * * Inputs: * fdb - A null pointer instructs this function to only allocate * space for the specified offset and length. * An actual fdbuffer instructs this function to perform * the read or write operation. * flags - defaults (zero value) to synchronous write * B_READ - indicates read operation * B_ASYNC - indicates perform operation asynchronously */ int ufs_alloc_data( vnode_t *vnodep, u_offset_t offset, size_t *len, fdbuffer_t *fdbp, int flags, cred_t *credp) { struct inode *ip = VTOI(vnodep); size_t done_len, io_len; int contig; u_offset_t uoff, io_off; int error = 0; /* No error occured */ int offsetn; /* Start point this IO */ int nbytes; /* Number bytes in this IO */ daddr_t bn; struct fs *fs; struct ufsvfs *ufsvfsp = ip->i_ufsvfs; int i_size_changed = 0; u_offset_t old_i_size; struct ulockfs *ulp; int trans_size; int issync; /* UFS Log transaction */ /* synchronous when non-zero */ int io_started = 0; /* No IO started */ uint_t protp = PROT_ALL; ASSERT((flags & B_WRITE) == 0); /* * Obey the lockfs protocol */ error = ufs_lockfs_begin_getpage(ufsvfsp, &ulp, segkmap, 0, &protp); if (error) { if ((fdbp != NULL) && (flags & B_ASYNC)) { fdb_ioerrdone(fdbp, error); } return (error); } if (ulp) { /* * Try to begin a UFS log transaction */ trans_size = TOP_GETPAGE_SIZE(ip); TRANS_TRY_BEGIN_CSYNC(ufsvfsp, issync, TOP_GETPAGE, trans_size, error); if (error == EWOULDBLOCK) { ufs_lockfs_end(ulp); if ((fdbp != NULL) && (flags & B_ASYNC)) { fdb_ioerrdone(fdbp, EDEADLK); } return (EDEADLK); } } uoff = offset; io_off = offset; io_len = *len; done_len = 0; DEBUGF((CE_CONT, "?ufs_alloc: off %llx len %lx size %llx fdb: %p\n", uoff, (io_len - done_len), ip->i_size, (void *)fdbp)); rw_enter(&ip->i_ufsvfs->vfs_dqrwlock, RW_READER); rw_enter(&ip->i_contents, RW_WRITER); ASSERT((ip->i_mode & IFMT) == IFREG); fs = ip->i_fs; while (error == 0 && done_len < io_len) { uoff = (u_offset_t)(io_off + done_len); offsetn = (int)blkoff(fs, uoff); nbytes = (int)MIN(fs->fs_bsize - offsetn, io_len - done_len); DEBUGF((CE_CONT, "?ufs_alloc_data: offset: %llx len %x\n", uoff, nbytes)); if (uoff + nbytes > ip->i_size) { /* * We are extending the length of the file. * bmap is used so that we are sure that * if we need to allocate new blocks, that it * is done here before we up the file size. */ DEBUGF((CE_CONT, "?ufs_alloc_data: grow %llx -> %llx\n", ip->i_size, uoff + nbytes)); error = bmap_write(ip, uoff, (offsetn + nbytes), BI_ALLOC_ONLY, NULL, credp); if (ip->i_flag & (ICHG|IUPD)) ip->i_seq++; if (error) { DEBUGF((CE_CONT, "?ufs_alloc_data: grow " "failed err: %d\n", error)); break; } if (fdbp != NULL) { if (uoff >= ip->i_size) { /* * Desired offset is past end of bytes * in file, so we have a hole. */ fdb_add_hole(fdbp, uoff - offset, nbytes); } else { int contig; buf_t *bp; error = bmap_read(ip, uoff, &bn, &contig); if (error) { break; } contig = ip->i_size - uoff; contig = P2ROUNDUP(contig, DEV_BSIZE); bp = fdb_iosetup(fdbp, uoff - offset, contig, vnodep, flags); bp->b_edev = ip->i_dev; bp->b_dev = cmpdev(ip->i_dev); bp->b_blkno = bn; bp->b_file = ip->i_vnode; bp->b_offset = (offset_t)uoff; if (ufsvfsp->vfs_snapshot) { fssnap_strategy( &ufsvfsp->vfs_snapshot, bp); } else { (void) bdev_strategy(bp); } io_started = 1; lwp_stat_update(LWP_STAT_OUBLK, 1); if ((flags & B_ASYNC) == 0) { error = biowait(bp); fdb_iodone(bp); if (error) { break; } } if (contig > (ip->i_size - uoff)) { contig -= ip->i_size - uoff; fdb_add_hole(fdbp, ip->i_size - offset, contig); } } } i_size_changed = 1; old_i_size = ip->i_size; UFS_SET_ISIZE(uoff + nbytes, ip); TRANS_INODE(ip->i_ufsvfs, ip); /* * file has grown larger than 2GB. Set flag * in superblock to indicate this, if it * is not already set. */ if ((ip->i_size > MAXOFF32_T) && !(fs->fs_flags & FSLARGEFILES)) { ASSERT(ufsvfsp->vfs_lfflags & UFS_LARGEFILES); mutex_enter(&ufsvfsp->vfs_lock); fs->fs_flags |= FSLARGEFILES; ufs_sbwrite(ufsvfsp); mutex_exit(&ufsvfsp->vfs_lock); } } else { /* * The file length is not being extended. */ error = bmap_read(ip, uoff, &bn, &contig); if (error) { DEBUGF((CE_CONT, "?ufs_alloc_data: " "bmap_read err: %d\n", error)); break; } if (bn != UFS_HOLE) { /* * Did not map a hole in the file */ int contig = P2ROUNDUP(nbytes, DEV_BSIZE); buf_t *bp; if (fdbp != NULL) { bp = fdb_iosetup(fdbp, uoff - offset, contig, vnodep, flags); bp->b_edev = ip->i_dev; bp->b_dev = cmpdev(ip->i_dev); bp->b_blkno = bn; bp->b_file = ip->i_vnode; bp->b_offset = (offset_t)uoff; if (ufsvfsp->vfs_snapshot) { fssnap_strategy( &ufsvfsp->vfs_snapshot, bp); } else { (void) bdev_strategy(bp); } io_started = 1; lwp_stat_update(LWP_STAT_OUBLK, 1); if ((flags & B_ASYNC) == 0) { error = biowait(bp); fdb_iodone(bp); if (error) { break; } } } } else { /* * We read a hole in the file. * We have to allocate blocks for the hole. */ error = bmap_write(ip, uoff, (offsetn + nbytes), BI_ALLOC_ONLY, NULL, credp); if (ip->i_flag & (ICHG|IUPD)) ip->i_seq++; if (error) { DEBUGF((CE_CONT, "?ufs_alloc_data: fill" " hole failed error: %d\n", error)); break; } if (fdbp != NULL) { fdb_add_hole(fdbp, uoff - offset, nbytes); } } } done_len += nbytes; } if (error) { if (i_size_changed) { /* * Allocation of the blocks for the file failed. * So truncate the file size back to its original size. */ (void) ufs_itrunc(ip, old_i_size, 0, credp); } } DEBUGF((CE_CONT, "?ufs_alloc: uoff %llx len %lx\n", uoff, (io_len - done_len))); if ((offset + *len) < (NDADDR * fs->fs_bsize)) { *len = (size_t)(roundup(offset + *len, fs->fs_fsize) - offset); } else { *len = (size_t)(roundup(offset + *len, fs->fs_bsize) - offset); } /* * Flush cached pages. * * XXX - There should be no pages involved, since the I/O was performed * through the device strategy routine and the page cache was bypassed. * However, testing has demonstrated that this VOP_PUTPAGE is * necessary. Without this, data might not always be read back as it * was written. * */ (void) VOP_PUTPAGE(vnodep, 0, 0, B_INVAL, credp); rw_exit(&ip->i_contents); rw_exit(&ip->i_ufsvfs->vfs_dqrwlock); if ((fdbp != NULL) && (flags & B_ASYNC)) { /* * Show that no more asynchronous IO will be added */ fdb_ioerrdone(fdbp, error); } if (ulp) { /* * End the UFS Log transaction */ TRANS_END_CSYNC(ufsvfsp, error, issync, TOP_GETPAGE, trans_size); ufs_lockfs_end(ulp); } if (io_started && (flags & B_ASYNC)) { return (0); } else { return (error); } }