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authorMark Fasheh <mark.fasheh@oracle.com>2007-03-09 19:53:21 -0500
committerMark Fasheh <mark.fasheh@oracle.com>2007-07-10 20:32:09 -0400
commitb25801038da5823bba1b5440a57ca68afc51b6bd (patch)
tree3a6f10f8ddb3a7552630d60aabbb790d1b5a7a77 /fs
parent063c4561f52a74de686fe0ff2f96f4f54c9fecd2 (diff)
ocfs2: Support xfs style space reservation ioctls
We re-use the RESVSP/UNRESVSP ioctls from xfs which allow the user to allocate and deallocate regions to a file without zeroing data or changing i_size. Though renamed, the structure passed in from user is identical to struct xfs_flock64. The three fields that are actually used right now are l_whence, l_start and l_len. This should get ocfs2 immediate compatibility with userspace software using the pre-existing xfs ioctls. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/ocfs2/file.c182
-rw-r--r--fs/ocfs2/file.h3
-rw-r--r--fs/ocfs2/ioctl.c15
-rw-r--r--fs/ocfs2/ocfs2_fs.h26
-rw-r--r--fs/ocfs2/super.c4
-rw-r--r--fs/ocfs2/super.h2
6 files changed, 216 insertions, 16 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 11f7cf9f2511..f04c7aa834cb 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1111,17 +1111,16 @@ out:
1111 return ret; 1111 return ret;
1112} 1112}
1113 1113
1114static int ocfs2_write_remove_suid(struct inode *inode) 1114static int __ocfs2_write_remove_suid(struct inode *inode,
1115 struct buffer_head *bh)
1115{ 1116{
1116 int ret; 1117 int ret;
1117 struct buffer_head *bh = NULL;
1118 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1119 handle_t *handle; 1118 handle_t *handle;
1120 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); 1119 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1121 struct ocfs2_dinode *di; 1120 struct ocfs2_dinode *di;
1122 1121
1123 mlog_entry("(Inode %llu, mode 0%o)\n", 1122 mlog_entry("(Inode %llu, mode 0%o)\n",
1124 (unsigned long long)oi->ip_blkno, inode->i_mode); 1123 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_mode);
1125 1124
1126 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); 1125 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1127 if (handle == NULL) { 1126 if (handle == NULL) {
@@ -1130,17 +1129,11 @@ static int ocfs2_write_remove_suid(struct inode *inode)
1130 goto out; 1129 goto out;
1131 } 1130 }
1132 1131
1133 ret = ocfs2_read_block(osb, oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
1134 if (ret < 0) {
1135 mlog_errno(ret);
1136 goto out_trans;
1137 }
1138
1139 ret = ocfs2_journal_access(handle, inode, bh, 1132 ret = ocfs2_journal_access(handle, inode, bh,
1140 OCFS2_JOURNAL_ACCESS_WRITE); 1133 OCFS2_JOURNAL_ACCESS_WRITE);
1141 if (ret < 0) { 1134 if (ret < 0) {
1142 mlog_errno(ret); 1135 mlog_errno(ret);
1143 goto out_bh; 1136 goto out_trans;
1144 } 1137 }
1145 1138
1146 inode->i_mode &= ~S_ISUID; 1139 inode->i_mode &= ~S_ISUID;
@@ -1153,8 +1146,7 @@ static int ocfs2_write_remove_suid(struct inode *inode)
1153 ret = ocfs2_journal_dirty(handle, bh); 1146 ret = ocfs2_journal_dirty(handle, bh);
1154 if (ret < 0) 1147 if (ret < 0)
1155 mlog_errno(ret); 1148 mlog_errno(ret);
1156out_bh: 1149
1157 brelse(bh);
1158out_trans: 1150out_trans:
1159 ocfs2_commit_trans(osb, handle); 1151 ocfs2_commit_trans(osb, handle);
1160out: 1152out:
@@ -1200,6 +1192,25 @@ out:
1200 return ret; 1192 return ret;
1201} 1193}
1202 1194
1195static int ocfs2_write_remove_suid(struct inode *inode)
1196{
1197 int ret;
1198 struct buffer_head *bh = NULL;
1199 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1200
1201 ret = ocfs2_read_block(OCFS2_SB(inode->i_sb),
1202 oi->ip_blkno, &bh, OCFS2_BH_CACHED, inode);
1203 if (ret < 0) {
1204 mlog_errno(ret);
1205 goto out;
1206 }
1207
1208 ret = __ocfs2_write_remove_suid(inode, bh);
1209out:
1210 brelse(bh);
1211 return ret;
1212}
1213
1203/* 1214/*
1204 * Allocate enough extents to cover the region starting at byte offset 1215 * Allocate enough extents to cover the region starting at byte offset
1205 * start for len bytes. Existing extents are skipped, any extents 1216 * start for len bytes. Existing extents are skipped, any extents
@@ -1490,6 +1501,151 @@ out:
1490 return ret; 1501 return ret;
1491} 1502}
1492 1503
1504/*
1505 * Parts of this function taken from xfs_change_file_space()
1506 */
1507int ocfs2_change_file_space(struct file *file, unsigned int cmd,
1508 struct ocfs2_space_resv *sr)
1509{
1510 int ret;
1511 s64 llen;
1512 struct inode *inode = file->f_path.dentry->d_inode;
1513 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
1514 struct buffer_head *di_bh = NULL;
1515 handle_t *handle;
1516 unsigned long long max_off = ocfs2_max_file_offset(inode->i_sb->s_blocksize_bits);
1517
1518 if ((cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) &&
1519 !ocfs2_writes_unwritten_extents(osb))
1520 return -ENOTTY;
1521 else if ((cmd == OCFS2_IOC_UNRESVSP || cmd == OCFS2_IOC_UNRESVSP64) &&
1522 !ocfs2_sparse_alloc(osb))
1523 return -ENOTTY;
1524
1525 if (!S_ISREG(inode->i_mode))
1526 return -EINVAL;
1527
1528 if (!(file->f_mode & FMODE_WRITE))
1529 return -EBADF;
1530
1531 if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
1532 return -EROFS;
1533
1534 mutex_lock(&inode->i_mutex);
1535
1536 /*
1537 * This prevents concurrent writes on other nodes
1538 */
1539 ret = ocfs2_rw_lock(inode, 1);
1540 if (ret) {
1541 mlog_errno(ret);
1542 goto out;
1543 }
1544
1545 ret = ocfs2_meta_lock(inode, &di_bh, 1);
1546 if (ret) {
1547 mlog_errno(ret);
1548 goto out_rw_unlock;
1549 }
1550
1551 if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
1552 ret = -EPERM;
1553 goto out_meta_unlock;
1554 }
1555
1556 switch (sr->l_whence) {
1557 case 0: /*SEEK_SET*/
1558 break;
1559 case 1: /*SEEK_CUR*/
1560 sr->l_start += file->f_pos;
1561 break;
1562 case 2: /*SEEK_END*/
1563 sr->l_start += i_size_read(inode);
1564 break;
1565 default:
1566 ret = -EINVAL;
1567 goto out_meta_unlock;
1568 }
1569 sr->l_whence = 0;
1570
1571 llen = sr->l_len > 0 ? sr->l_len - 1 : sr->l_len;
1572
1573 if (sr->l_start < 0
1574 || sr->l_start > max_off
1575 || (sr->l_start + llen) < 0
1576 || (sr->l_start + llen) > max_off) {
1577 ret = -EINVAL;
1578 goto out_meta_unlock;
1579 }
1580
1581 if (cmd == OCFS2_IOC_RESVSP || cmd == OCFS2_IOC_RESVSP64) {
1582 if (sr->l_len <= 0) {
1583 ret = -EINVAL;
1584 goto out_meta_unlock;
1585 }
1586 }
1587
1588 if (should_remove_suid(file->f_path.dentry)) {
1589 ret = __ocfs2_write_remove_suid(inode, di_bh);
1590 if (ret) {
1591 mlog_errno(ret);
1592 goto out_meta_unlock;
1593 }
1594 }
1595
1596 down_write(&OCFS2_I(inode)->ip_alloc_sem);
1597 switch (cmd) {
1598 case OCFS2_IOC_RESVSP:
1599 case OCFS2_IOC_RESVSP64:
1600 /*
1601 * This takes unsigned offsets, but the signed ones we
1602 * pass have been checked against overflow above.
1603 */
1604 ret = ocfs2_allocate_unwritten_extents(inode, sr->l_start,
1605 sr->l_len);
1606 break;
1607 case OCFS2_IOC_UNRESVSP:
1608 case OCFS2_IOC_UNRESVSP64:
1609 ret = ocfs2_remove_inode_range(inode, di_bh, sr->l_start,
1610 sr->l_len);
1611 break;
1612 default:
1613 ret = -EINVAL;
1614 }
1615 up_write(&OCFS2_I(inode)->ip_alloc_sem);
1616 if (ret) {
1617 mlog_errno(ret);
1618 goto out_meta_unlock;
1619 }
1620
1621 /*
1622 * We update c/mtime for these changes
1623 */
1624 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
1625 if (IS_ERR(handle)) {
1626 ret = PTR_ERR(handle);
1627 mlog_errno(ret);
1628 goto out_meta_unlock;
1629 }
1630
1631 inode->i_ctime = inode->i_mtime = CURRENT_TIME;
1632 ret = ocfs2_mark_inode_dirty(handle, inode, di_bh);
1633 if (ret < 0)
1634 mlog_errno(ret);
1635
1636 ocfs2_commit_trans(osb, handle);
1637
1638out_meta_unlock:
1639 brelse(di_bh);
1640 ocfs2_meta_unlock(inode, 1);
1641out_rw_unlock:
1642 ocfs2_rw_unlock(inode, 1);
1643
1644 mutex_unlock(&inode->i_mutex);
1645out:
1646 return ret;
1647}
1648
1493static int ocfs2_prepare_inode_for_write(struct dentry *dentry, 1649static int ocfs2_prepare_inode_for_write(struct dentry *dentry,
1494 loff_t *ppos, 1650 loff_t *ppos,
1495 size_t count, 1651 size_t count,
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 79115c92dc30..36fe27f268ee 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -62,4 +62,7 @@ int ocfs2_should_update_atime(struct inode *inode,
62int ocfs2_update_inode_atime(struct inode *inode, 62int ocfs2_update_inode_atime(struct inode *inode,
63 struct buffer_head *bh); 63 struct buffer_head *bh);
64 64
65int ocfs2_change_file_space(struct file *file, unsigned int cmd,
66 struct ocfs2_space_resv *sr);
67
65#endif /* OCFS2_FILE_H */ 68#endif /* OCFS2_FILE_H */
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index f3ad21ad9aed..bd68c3f2afbe 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -14,6 +14,7 @@
14#include "ocfs2.h" 14#include "ocfs2.h"
15#include "alloc.h" 15#include "alloc.h"
16#include "dlmglue.h" 16#include "dlmglue.h"
17#include "file.h"
17#include "inode.h" 18#include "inode.h"
18#include "journal.h" 19#include "journal.h"
19 20
@@ -115,6 +116,7 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
115{ 116{
116 unsigned int flags; 117 unsigned int flags;
117 int status; 118 int status;
119 struct ocfs2_space_resv sr;
118 120
119 switch (cmd) { 121 switch (cmd) {
120 case OCFS2_IOC_GETFLAGS: 122 case OCFS2_IOC_GETFLAGS:
@@ -130,6 +132,14 @@ int ocfs2_ioctl(struct inode * inode, struct file * filp,
130 132
131 return ocfs2_set_inode_attr(inode, flags, 133 return ocfs2_set_inode_attr(inode, flags,
132 OCFS2_FL_MODIFIABLE); 134 OCFS2_FL_MODIFIABLE);
135 case OCFS2_IOC_RESVSP:
136 case OCFS2_IOC_RESVSP64:
137 case OCFS2_IOC_UNRESVSP:
138 case OCFS2_IOC_UNRESVSP64:
139 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
140 return -EFAULT;
141
142 return ocfs2_change_file_space(filp, cmd, &sr);
133 default: 143 default:
134 return -ENOTTY; 144 return -ENOTTY;
135 } 145 }
@@ -148,6 +158,11 @@ long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
148 case OCFS2_IOC32_SETFLAGS: 158 case OCFS2_IOC32_SETFLAGS:
149 cmd = OCFS2_IOC_SETFLAGS; 159 cmd = OCFS2_IOC_SETFLAGS;
150 break; 160 break;
161 case OCFS2_IOC_RESVSP:
162 case OCFS2_IOC_RESVSP64:
163 case OCFS2_IOC_UNRESVSP:
164 case OCFS2_IOC_UNRESVSP64:
165 break;
151 default: 166 default:
152 return -ENOIOCTLCMD; 167 return -ENOIOCTLCMD;
153 } 168 }
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index c20a74b99d87..82f8a75b207e 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -175,6 +175,32 @@
175#define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int) 175#define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int)
176 176
177/* 177/*
178 * Space reservation / allocation / free ioctls and argument structure
179 * are designed to be compatible with XFS.
180 *
181 * ALLOCSP* and FREESP* are not and will never be supported, but are
182 * included here for completeness.
183 */
184struct ocfs2_space_resv {
185 __s16 l_type;
186 __s16 l_whence;
187 __s64 l_start;
188 __s64 l_len; /* len == 0 means until end of file */
189 __s32 l_sysid;
190 __u32 l_pid;
191 __s32 l_pad[4]; /* reserve area */
192};
193
194#define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
195#define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
196#define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
197#define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
198#define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
199#define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
200#define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
201#define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
202
203/*
178 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) 204 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
179 */ 205 */
180#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ 206#define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index f07718a7552b..3a5a1ed09ac9 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -115,8 +115,6 @@ static void ocfs2_write_super(struct super_block *sb);
115static struct inode *ocfs2_alloc_inode(struct super_block *sb); 115static struct inode *ocfs2_alloc_inode(struct super_block *sb);
116static void ocfs2_destroy_inode(struct inode *inode); 116static void ocfs2_destroy_inode(struct inode *inode);
117 117
118static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
119
120static const struct super_operations ocfs2_sops = { 118static const struct super_operations ocfs2_sops = {
121 .statfs = ocfs2_statfs, 119 .statfs = ocfs2_statfs,
122 .alloc_inode = ocfs2_alloc_inode, 120 .alloc_inode = ocfs2_alloc_inode,
@@ -321,7 +319,7 @@ static void ocfs2_destroy_inode(struct inode *inode)
321/* From xfs_super.c:xfs_max_file_offset 319/* From xfs_super.c:xfs_max_file_offset
322 * Copyright (c) 2000-2004 Silicon Graphics, Inc. 320 * Copyright (c) 2000-2004 Silicon Graphics, Inc.
323 */ 321 */
324static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) 322unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
325{ 323{
326 unsigned int pagefactor = 1; 324 unsigned int pagefactor = 1;
327 unsigned int bitshift = BITS_PER_LONG - 1; 325 unsigned int bitshift = BITS_PER_LONG - 1;
diff --git a/fs/ocfs2/super.h b/fs/ocfs2/super.h
index 783f5270f2a1..3b9cb3d0b008 100644
--- a/fs/ocfs2/super.h
+++ b/fs/ocfs2/super.h
@@ -45,4 +45,6 @@ void __ocfs2_abort(struct super_block *sb,
45 45
46#define ocfs2_abort(sb, fmt, args...) __ocfs2_abort(sb, __PRETTY_FUNCTION__, fmt, ##args) 46#define ocfs2_abort(sb, fmt, args...) __ocfs2_abort(sb, __PRETTY_FUNCTION__, fmt, ##args)
47 47
48unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
49
48#endif /* OCFS2_SUPER_H */ 50#endif /* OCFS2_SUPER_H */