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Diffstat (limited to 'fs/reiserfs/ioctl.c')
-rw-r--r--fs/reiserfs/ioctl.c197
1 files changed, 101 insertions, 96 deletions
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index 76caedf737f2..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
@@ -19,69 +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 if (!reiserfs_attrs (inode->i_sb)) 39 if (!reiserfs_attrs(inode->i_sb))
40 return -ENOTTY; 40 return -ENOTTY;
41 41
42 flags = REISERFS_I(inode) -> i_attrs; 42 flags = REISERFS_I(inode)->i_attrs;
43 i_attrs_to_sd_attrs( inode, ( __u16 * ) &flags ); 43 i_attrs_to_sd_attrs(inode, (__u16 *) & flags);
44 return put_user(flags, (int __user *) arg); 44 return put_user(flags, (int __user *)arg);
45 case REISERFS_IOC_SETFLAGS: { 45 case REISERFS_IOC_SETFLAGS:{
46 if (!reiserfs_attrs (inode->i_sb)) 46 if (!reiserfs_attrs(inode->i_sb))
47 return -ENOTTY; 47 return -ENOTTY;
48 48
49 if (IS_RDONLY(inode)) 49 if (IS_RDONLY(inode))
50 return -EROFS; 50 return -EROFS;
51 51
52 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) 52 if ((current->fsuid != inode->i_uid)
53 return -EPERM; 53 && !capable(CAP_FOWNER))
54 return -EPERM;
54 55
55 if (get_user(flags, (int __user *) arg)) 56 if (get_user(flags, (int __user *)arg))
56 return -EFAULT; 57 return -EFAULT;
57 58
58 if ( ( ( flags ^ REISERFS_I(inode) -> i_attrs) & ( REISERFS_IMMUTABLE_FL | REISERFS_APPEND_FL)) && 59 if (((flags ^ REISERFS_I(inode)->
59 !capable( CAP_LINUX_IMMUTABLE ) ) 60 i_attrs) & (REISERFS_IMMUTABLE_FL |
60 return -EPERM; 61 REISERFS_APPEND_FL))
61 62 && !capable(CAP_LINUX_IMMUTABLE))
62 if( ( flags & REISERFS_NOTAIL_FL ) && 63 return -EPERM;
63 S_ISREG( inode -> i_mode ) ) { 64
65 if ((flags & REISERFS_NOTAIL_FL) &&
66 S_ISREG(inode->i_mode)) {
64 int result; 67 int result;
65 68
66 result = reiserfs_unpack( inode, filp ); 69 result = reiserfs_unpack(inode, filp);
67 if( result ) 70 if (result)
68 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;
69 } 78 }
70 sd_attrs_to_i_attrs( flags, inode );
71 REISERFS_I(inode) -> i_attrs = flags;
72 inode->i_ctime = CURRENT_TIME_SEC;
73 mark_inode_dirty(inode);
74 return 0;
75 }
76 case REISERFS_IOC_GETVERSION: 79 case REISERFS_IOC_GETVERSION:
77 return put_user(inode->i_generation, (int __user *) arg); 80 return put_user(inode->i_generation, (int __user *)arg);
78 case REISERFS_IOC_SETVERSION: 81 case REISERFS_IOC_SETVERSION:
79 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) 82 if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
80 return -EPERM; 83 return -EPERM;
81 if (IS_RDONLY(inode)) 84 if (IS_RDONLY(inode))
82 return -EROFS; 85 return -EROFS;
83 if (get_user(inode->i_generation, (int __user *) arg)) 86 if (get_user(inode->i_generation, (int __user *)arg))
84 return -EFAULT; 87 return -EFAULT;
85 inode->i_ctime = CURRENT_TIME_SEC; 88 inode->i_ctime = CURRENT_TIME_SEC;
86 mark_inode_dirty(inode); 89 mark_inode_dirty(inode);
87 return 0; 90 return 0;
@@ -95,63 +98,65 @@ int reiserfs_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
95** Function try to convert tail from direct item into indirect. 98** Function try to convert tail from direct item into indirect.
96** It set up nopack attribute in the REISERFS_I(inode)->nopack 99** It set up nopack attribute in the REISERFS_I(inode)->nopack
97*/ 100*/
98static int reiserfs_unpack (struct inode * inode, struct file * filp) 101static int reiserfs_unpack(struct inode *inode, struct file *filp)
99{ 102{
100 int retval = 0; 103 int retval = 0;
101 int index ; 104 int index;
102 struct page *page ; 105 struct page *page;
103 struct address_space *mapping ; 106 struct address_space *mapping;
104 unsigned long write_from ; 107 unsigned long write_from;
105 unsigned long blocksize = inode->i_sb->s_blocksize ; 108 unsigned long blocksize = inode->i_sb->s_blocksize;
106 109
107 if (inode->i_size == 0) { 110 if (inode->i_size == 0) {
108 REISERFS_I(inode)->i_flags |= i_nopack_mask; 111 REISERFS_I(inode)->i_flags |= i_nopack_mask;
109 return 0 ; 112 return 0;
110 } 113 }
111 /* ioctl already done */ 114 /* ioctl already done */
112 if (REISERFS_I(inode)->i_flags & i_nopack_mask) { 115 if (REISERFS_I(inode)->i_flags & i_nopack_mask) {
113 return 0 ; 116 return 0;
114 } 117 }
115 reiserfs_write_lock(inode->i_sb); 118 reiserfs_write_lock(inode->i_sb);
116 119
117 /* 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
118 ** us 121 ** us
119 */ 122 */
120 down(&inode->i_sem) ; 123 down(&inode->i_sem);
121 124
122 write_from = inode->i_size & (blocksize - 1) ; 125 write_from = inode->i_size & (blocksize - 1);
123 /* if we are on a block boundary, we are already unpacked. */ 126 /* if we are on a block boundary, we are already unpacked. */
124 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);
125 REISERFS_I(inode)->i_flags |= i_nopack_mask; 152 REISERFS_I(inode)->i_flags |= i_nopack_mask;
126 goto out ; 153
127 } 154 out_unlock:
128 155 unlock_page(page);
129 /* we unpack by finding the page with the tail, and calling 156 page_cache_release(page);
130 ** reiserfs_prepare_write on that page. This will force a 157
131 ** reiserfs_get_block to unpack the tail for us. 158 out:
132 */ 159 up(&inode->i_sem);
133 index = inode->i_size >> PAGE_CACHE_SHIFT ; 160 reiserfs_write_unlock(inode->i_sb);
134 mapping = inode->i_mapping ; 161 return retval;
135 page = grab_cache_page(mapping, index) ;
136 retval = -ENOMEM;
137 if (!page) {
138 goto out ;
139 }
140 retval = mapping->a_ops->prepare_write(NULL, page, write_from, write_from) ;
141 if (retval)
142 goto out_unlock ;
143
144 /* conversion can change page contents, must flush */
145 flush_dcache_page(page) ;
146 retval = mapping->a_ops->commit_write(NULL, page, write_from, write_from) ;
147 REISERFS_I(inode)->i_flags |= i_nopack_mask;
148
149out_unlock:
150 unlock_page(page) ;
151 page_cache_release(page) ;
152
153out:
154 up(&inode->i_sem) ;
155 reiserfs_write_unlock(inode->i_sb);
156 return retval;
157} 162}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-27 14:13:59 -0500