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authorArtem B. Bityuckiy <dedekind@infradead.org>2005-03-01 10:50:52 +0000
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-05-23 12:48:15 +0200
commit32f1a95d505b99b1f01b6aeea36ec3f97245b357 (patch)
tree5da0e8b01362cf6b0cc79f11e5e9b3fd4ad169d6 /fs/jffs2/dir.c
parent20a6c211903dce92a0db7f19c221cfa3f2cb4c32 (diff)
[JFFS2] Add symlink caching support.
Signed-off-by: Artem B. Bityuckiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/jffs2/dir.c')
-rw-r--r--fs/jffs2/dir.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index 757306fa3ff4..6421be874ce3 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -7,7 +7,7 @@
*
* For licensing information, see the file 'LICENCE' in this directory.
*
- * $Id: dir.c,v 1.84 2004/11/16 20:36:11 dwmw2 Exp $
+ * $Id: dir.c,v 1.85 2005/03/01 10:34:03 dedekind Exp $
*
*/
@@ -296,11 +296,11 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
struct jffs2_full_dirent *fd;
int namelen;
uint32_t alloclen, phys_ofs;
- int ret;
+ int ret, targetlen = strlen(target);
/* FIXME: If you care. We'd need to use frags for the target
if it grows much more than this */
- if (strlen(target) > 254)
+ if (targetlen > 254)
return -EINVAL;
ri = jffs2_alloc_raw_inode();
@@ -314,7 +314,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
* Just the node will do for now, though
*/
namelen = dentry->d_name.len;
- ret = jffs2_reserve_space(c, sizeof(*ri) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL);
+ ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &phys_ofs, &alloclen, ALLOC_NORMAL);
if (ret) {
jffs2_free_raw_inode(ri);
@@ -333,16 +333,16 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
f = JFFS2_INODE_INFO(inode);
- inode->i_size = strlen(target);
+ inode->i_size = targetlen;
ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
ri->compr = JFFS2_COMPR_NONE;
- ri->data_crc = cpu_to_je32(crc32(0, target, strlen(target)));
+ ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
- fn = jffs2_write_dnode(c, f, ri, target, strlen(target), phys_ofs, ALLOC_NORMAL);
+ fn = jffs2_write_dnode(c, f, ri, target, targetlen, phys_ofs, ALLOC_NORMAL);
jffs2_free_raw_inode(ri);
@@ -353,6 +353,20 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
jffs2_clear_inode(inode);
return PTR_ERR(fn);
}
+
+ /* We use f->dents field to store the target path. */
+ f->dents = kmalloc(targetlen + 1, GFP_KERNEL);
+ if (!f->dents) {
+ printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
+ up(&f->sem);
+ jffs2_complete_reservation(c);
+ jffs2_clear_inode(inode);
+ return -ENOMEM;
+ }
+
+ memcpy(f->dents, target, targetlen + 1);
+ D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->dents));
+
/* No data here. Only a metadata node, which will be
obsoleted by the first data write
*/