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path: root/drivers/md/dm-stripe.c
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Diffstat (limited to 'drivers/md/dm-stripe.c')
-rw-r--r--drivers/md/dm-stripe.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index 08328a8f5a3c..6c29fcecd892 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -12,6 +12,8 @@
12#include <linux/bio.h> 12#include <linux/bio.h>
13#include <linux/slab.h> 13#include <linux/slab.h>
14 14
15#define DM_MSG_PREFIX "striped"
16
15struct stripe { 17struct stripe {
16 struct dm_dev *dev; 18 struct dm_dev *dev;
17 sector_t physical_start; 19 sector_t physical_start;
@@ -78,19 +80,19 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
78 unsigned int i; 80 unsigned int i;
79 81
80 if (argc < 2) { 82 if (argc < 2) {
81 ti->error = "dm-stripe: Not enough arguments"; 83 ti->error = "Not enough arguments";
82 return -EINVAL; 84 return -EINVAL;
83 } 85 }
84 86
85 stripes = simple_strtoul(argv[0], &end, 10); 87 stripes = simple_strtoul(argv[0], &end, 10);
86 if (*end) { 88 if (*end) {
87 ti->error = "dm-stripe: Invalid stripe count"; 89 ti->error = "Invalid stripe count";
88 return -EINVAL; 90 return -EINVAL;
89 } 91 }
90 92
91 chunk_size = simple_strtoul(argv[1], &end, 10); 93 chunk_size = simple_strtoul(argv[1], &end, 10);
92 if (*end) { 94 if (*end) {
93 ti->error = "dm-stripe: Invalid chunk_size"; 95 ti->error = "Invalid chunk_size";
94 return -EINVAL; 96 return -EINVAL;
95 } 97 }
96 98
@@ -99,19 +101,19 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
99 */ 101 */
100 if (!chunk_size || (chunk_size & (chunk_size - 1)) || 102 if (!chunk_size || (chunk_size & (chunk_size - 1)) ||
101 (chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) { 103 (chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) {
102 ti->error = "dm-stripe: Invalid chunk size"; 104 ti->error = "Invalid chunk size";
103 return -EINVAL; 105 return -EINVAL;
104 } 106 }
105 107
106 if (ti->len & (chunk_size - 1)) { 108 if (ti->len & (chunk_size - 1)) {
107 ti->error = "dm-stripe: Target length not divisible by " 109 ti->error = "Target length not divisible by "
108 "chunk size"; 110 "chunk size";
109 return -EINVAL; 111 return -EINVAL;
110 } 112 }
111 113
112 width = ti->len; 114 width = ti->len;
113 if (sector_div(width, stripes)) { 115 if (sector_div(width, stripes)) {
114 ti->error = "dm-stripe: Target length not divisible by " 116 ti->error = "Target length not divisible by "
115 "number of stripes"; 117 "number of stripes";
116 return -EINVAL; 118 return -EINVAL;
117 } 119 }
@@ -120,14 +122,14 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
120 * Do we have enough arguments for that many stripes ? 122 * Do we have enough arguments for that many stripes ?
121 */ 123 */
122 if (argc != (2 + 2 * stripes)) { 124 if (argc != (2 + 2 * stripes)) {
123 ti->error = "dm-stripe: Not enough destinations " 125 ti->error = "Not enough destinations "
124 "specified"; 126 "specified";
125 return -EINVAL; 127 return -EINVAL;
126 } 128 }
127 129
128 sc = alloc_context(stripes); 130 sc = alloc_context(stripes);
129 if (!sc) { 131 if (!sc) {
130 ti->error = "dm-stripe: Memory allocation for striped context " 132 ti->error = "Memory allocation for striped context "
131 "failed"; 133 "failed";
132 return -ENOMEM; 134 return -ENOMEM;
133 } 135 }
@@ -149,8 +151,7 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
149 151
150 r = get_stripe(ti, sc, i, argv); 152 r = get_stripe(ti, sc, i, argv);
151 if (r < 0) { 153 if (r < 0) {
152 ti->error = "dm-stripe: Couldn't parse stripe " 154 ti->error = "Couldn't parse stripe destination";
153 "destination";
154 while (i--) 155 while (i--)
155 dm_put_device(ti, sc->stripe[i].dev); 156 dm_put_device(ti, sc->stripe[i].dev);
156 kfree(sc); 157 kfree(sc);
@@ -227,7 +228,7 @@ int __init dm_stripe_init(void)
227 228
228 r = dm_register_target(&stripe_target); 229 r = dm_register_target(&stripe_target);
229 if (r < 0) 230 if (r < 0)
230 DMWARN("striped target registration failed"); 231 DMWARN("target registration failed");
231 232
232 return r; 233 return r;
233} 234}
@@ -235,7 +236,7 @@ int __init dm_stripe_init(void)
235void dm_stripe_exit(void) 236void dm_stripe_exit(void)
236{ 237{
237 if (dm_unregister_target(&stripe_target)) 238 if (dm_unregister_target(&stripe_target))
238 DMWARN("striped target unregistration failed"); 239 DMWARN("target unregistration failed");
239 240
240 return; 241 return;
241} 242}