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-rw-r--r--fs/reiserfs/ioctl.c197
1 files changed, 104 insertions, 93 deletions
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 94dc42475a04..81fc00285f60 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -9,7 +9,7 @@
9#include <linux/pagemap.h> 9#include <linux/pagemap.h>
10#include <linux/smp_lock.h> 10#include <linux/smp_lock.h>
11 11
12static int reiserfs_unpack (struct inode * inode, struct file * filp); 12static int reiserfs_unpack(struct inode *inode, struct file *filp);
13 13
14/* 14/*
15** reiserfs_ioctl - handler for ioctl for inode 15** reiserfs_ioctl - handler for ioctl for inode
@@ -19,63 +19,72 @@ static int reiserfs_unpack (struct inode * inode, struct file * filp);
19** 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION 19** 2) REISERFS_IOC_[GS]ETFLAGS, REISERFS_IOC_[GS]ETVERSION
20** 3) That's all for a while ... 20** 3) That's all for a while ...
21*/ 21*/
22int reiserfs_ioctl (struct inode * inode, struct file * filp, unsigned int cmd, 22int reiserfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
23 unsigned long arg) 23 unsigned long arg)
24{ 24{
25 unsigned int flags; 25 unsigned int flags;
26 26
27 switch (cmd) { 27 switch (cmd) {
28 case REISERFS_IOC_UNPACK: 28 case REISERFS_IOC_UNPACK:
29 if( S_ISREG( inode -> i_mode ) ) { 29 if (S_ISREG(inode->i_mode)) {
30 if (arg) 30 if (arg)
31 return reiserfs_unpack (inode, filp); 31 return reiserfs_unpack(inode, filp);
32 else 32 else
33 return 0; 33 return 0;
34 } else 34 } else
35 return -ENOTTY; 35 return -ENOTTY;
36 /* following two cases are taken from fs/ext2/ioctl.c by Remy 36 /* following two cases are taken from fs/ext2/ioctl.c by Remy
37 Card (card@masi.ibp.fr) */ 37 Card (card@masi.ibp.fr) */
38 case REISERFS_IOC_GETFLAGS: 38 case REISERFS_IOC_GETFLAGS:
39 flags = REISERFS_I(inode) -> i_attrs; 39 if (!reiserfs_attrs(inode->i_sb))
40 i_attrs_to_sd_attrs( inode, ( __u16 * ) &flags ); 40 return -ENOTTY;
41 return put_user(flags, (int __user *) arg);
42 case REISERFS_IOC_SETFLAGS: {
43 if (IS_RDONLY(inode))
44 return -EROFS;
45 41
46 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) 42 flags = REISERFS_I(inode)->i_attrs;
47 return -EPERM; 43 i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
44 return put_user(flags, (int __user *)arg);
45 case REISERFS_IOC_SETFLAGS:{
46 if (!reiserfs_attrs(inode->i_sb))
47 return -ENOTTY;
48 48
49 if (get_user(flags, (int __user *) arg)) 49 if (IS_RDONLY(inode))
50 return -EFAULT; 50 return -EROFS;
51 51
52 if ( ( ( flags ^ REISERFS_I(inode) -> i_attrs) & ( REISERFS_IMMUTABLE_FL | REISERFS_APPEND_FL)) && 52 if ((current->fsuid != inode->i_uid)
53 !capable( CAP_LINUX_IMMUTABLE ) ) 53 && !capable(CAP_FOWNER))
54 return -EPERM; 54 return -EPERM;
55 55
56 if( ( flags & REISERFS_NOTAIL_FL ) && 56 if (get_user(flags, (int __user *)arg))
57 S_ISREG( inode -> i_mode ) ) { 57 return -EFAULT;
58
59 if (((flags ^ REISERFS_I(inode)->
60 i_attrs) & (REISERFS_IMMUTABLE_FL |
61 REISERFS_APPEND_FL))
62 && !capable(CAP_LINUX_IMMUTABLE))
63 return -EPERM;
64
65 if ((flags & REISERFS_NOTAIL_FL) &&
66 S_ISREG(inode->i_mode)) {
58 int result; 67 int result;
59 68
60 result = reiserfs_unpack( inode, filp ); 69 result = reiserfs_unpack(inode, filp);
61 if( result ) 70 if (result)
62 return result; 71 return result;
72 }
73 sd_attrs_to_i_attrs(flags, inode);
74 REISERFS_I(inode)->i_attrs = flags;
75 inode->i_ctime = CURRENT_TIME_SEC;
76 mark_inode_dirty(inode);
77 return 0;
63 } 78 }
64 sd_attrs_to_i_attrs( flags, inode );
65 REISERFS_I(inode) -> i_attrs = flags;
66 inode->i_ctime = CURRENT_TIME_SEC;
67 mark_inode_dirty(inode);
68 return 0;
69 }
70 case REISERFS_IOC_GETVERSION: 79 case REISERFS_IOC_GETVERSION:
71 return put_user(inode->i_generation, (int __user *) arg); 80 return put_user(inode->i_generation, (int __user *)arg);
72 case REISERFS_IOC_SETVERSION: 81 case REISERFS_IOC_SETVERSION:
73 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) 82 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
74 return -EPERM; 83 return -EPERM;
75 if (IS_RDONLY(inode)) 84 if (IS_RDONLY(inode))
76 return -EROFS; 85 return -EROFS;
77 if (get_user(inode->i_generation, (int __user *) arg)) 86 if (get_user(inode->i_generation, (int __user *)arg))
78 return -EFAULT; 87 return -EFAULT;
79 inode->i_ctime = CURRENT_TIME_SEC; 88 inode->i_ctime = CURRENT_TIME_SEC;
80 mark_inode_dirty(inode); 89 mark_inode_dirty(inode);
81 return 0; 90 return 0;
@@ -89,63 +98,65 @@ int reiserfs_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
89** Function try to convert tail from direct item into indirect. 98** Function try to convert tail from direct item into indirect.
90** It set up nopack attribute in the REISERFS_I(inode)->nopack 99** It set up nopack attribute in the REISERFS_I(inode)->nopack
91*/ 100*/
92static int reiserfs_unpack (struct inode * inode, struct file * filp) 101static int reiserfs_unpack(struct inode *inode, struct file *filp)
93{ 102{
94 int retval = 0; 103 int retval = 0;
95 int index ; 104 int index;
96 struct page *page ; 105 struct page *page;
97 struct address_space *mapping ; 106 struct address_space *mapping;
98 unsigned long write_from ; 107 unsigned long write_from;
99 unsigned long blocksize = inode->i_sb->s_blocksize ; 108 unsigned long blocksize = inode->i_sb->s_blocksize;
100 109
101 if (inode->i_size == 0) { 110 if (inode->i_size == 0) {
102 REISERFS_I(inode)->i_flags |= i_nopack_mask; 111 REISERFS_I(inode)->i_flags |= i_nopack_mask;
103 return 0 ; 112 return 0;
104 } 113 }
105 /* ioctl already done */ 114 /* ioctl already done */
106 if (REISERFS_I(inode)->i_flags & i_nopack_mask) { 115 if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
107 return 0 ; 116 return 0;
108 } 117 }
109 reiserfs_write_lock(inode->i_sb); 118 reiserfs_write_lock(inode->i_sb);
110 119
111 /* we need to make sure nobody is changing the file size beneath 120 /* we need to make sure nobody is changing the file size beneath
112 ** us 121 ** us
113 */ 122 */
114 down(&inode->i_sem) ; 123 down(&inode->i_sem);
115 124
116 write_from = inode->i_size & (blocksize - 1) ; 125 write_from = inode->i_size & (blocksize - 1);
117 /* if we are on a block boundary, we are already unpacked. */ 126 /* if we are on a block boundary, we are already unpacked. */
118 if ( write_from == 0) { 127 if (write_from == 0) {
128 REISERFS_I(inode)->i_flags |= i_nopack_mask;
129 goto out;
130 }
131
132 /* we unpack by finding the page with the tail, and calling
133 ** reiserfs_prepare_write on that page. This will force a
134 ** reiserfs_get_block to unpack the tail for us.
135 */
136 index = inode->i_size >> PAGE_CACHE_SHIFT;
137 mapping = inode->i_mapping;
138 page = grab_cache_page(mapping, index);
139 retval = -ENOMEM;
140 if (!page) {
141 goto out;
142 }
143 retval =
144 mapping->a_ops->prepare_write(NULL, page, write_from, write_from);
145 if (retval)
146 goto out_unlock;
147
148 /* conversion can change page contents, must flush */
149 flush_dcache_page(page);
150 retval =
151 mapping->a_ops->commit_write(NULL, page, write_from, write_from);
119 REISERFS_I(inode)->i_flags |= i_nopack_mask; 152 REISERFS_I(inode)->i_flags |= i_nopack_mask;
120 goto out ; 153
121 } 154 out_unlock:
122 155 unlock_page(page);
123 /* we unpack by finding the page with the tail, and calling 156 page_cache_release(page);
124 ** reiserfs_prepare_write on that page. This will force a 157
125 ** reiserfs_get_block to unpack the tail for us. 158 out:
126 */ 159 up(&inode->i_sem);
127 index = inode->i_size >> PAGE_CACHE_SHIFT ; 160 reiserfs_write_unlock(inode->i_sb);
128 mapping = inode->i_mapping ; 161 return retval;
129 page = grab_cache_page(mapping, index) ;
130 retval = -ENOMEM;
131 if (!page) {
132 goto out ;
133 }
134 retval = mapping->a_ops->prepare_write(NULL, page, write_from, write_from) ;
135 if (retval)
136 goto out_unlock ;
137
138 /* conversion can change page contents, must flush */
139 flush_dcache_page(page) ;
140 retval = mapping->a_ops->commit_write(NULL, page, write_from, write_from) ;
141 REISERFS_I(inode)->i_flags |= i_nopack_mask;
142
143out_unlock:
144 unlock_page(page) ;
145 page_cache_release(page) ;
146
147out:
148 up(&inode->i_sem) ;
149 reiserfs_write_unlock(inode->i_sb);
150 return retval;
151} 162}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-26 05:01:57 -0500