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author | Artem B. Bityuckiy <dedekind@infradead.org> | 2005-03-01 10:50:52 +0000 |
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committer | Thomas Gleixner <tglx@mtd.linutronix.de> | 2005-05-23 12:48:15 +0200 |
commit | 32f1a95d505b99b1f01b6aeea36ec3f97245b357 (patch) | |
tree | 5da0e8b01362cf6b0cc79f11e5e9b3fd4ad169d6 /fs/jffs2/readinode.c | |
parent | 20a6c211903dce92a0db7f19c221cfa3f2cb4c32 (diff) | |
download | kernel_samsung_smdk4412-32f1a95d505b99b1f01b6aeea36ec3f97245b357.zip kernel_samsung_smdk4412-32f1a95d505b99b1f01b6aeea36ec3f97245b357.tar.gz kernel_samsung_smdk4412-32f1a95d505b99b1f01b6aeea36ec3f97245b357.tar.bz2 |
[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/readinode.c')
-rw-r--r-- | fs/jffs2/readinode.c | 54 |
1 files changed, 48 insertions, 6 deletions
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c index a1980a9..ef55247 100644 --- a/fs/jffs2/readinode.c +++ b/fs/jffs2/readinode.c @@ -7,7 +7,7 @@ * * For licensing information, see the file 'LICENCE' in this directory. * - * $Id: readinode.c,v 1.118 2005/02/27 23:01:33 dwmw2 Exp $ + * $Id: readinode.c,v 1.119 2005/03/01 10:34:03 dedekind Exp $ * */ @@ -623,6 +623,40 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c, case. */ if (!je32_to_cpu(latest_node->isize)) latest_node->isize = latest_node->dsize; + + if (f->inocache->state != INO_STATE_CHECKING) { + /* Symlink's inode data is the target path. Read it and + * keep in RAM to facilitate quick follow symlink operation. + * We use f->dents field to store the target path, which + * is somewhat ugly. */ + f->dents = kmalloc(je32_to_cpu(latest_node->csize) + 1, GFP_KERNEL); + if (!f->dents) { + printk(KERN_WARNING "Can't allocate %d bytes of memory " + "for the symlink target path cache\n", + je32_to_cpu(latest_node->csize)); + up(&f->sem); + jffs2_do_clear_inode(c, f); + return -ENOMEM; + } + + ret = jffs2_flash_read(c, ref_offset(fn->raw) + sizeof(*latest_node), + je32_to_cpu(latest_node->csize), &retlen, (char *)f->dents); + + if (ret || retlen != je32_to_cpu(latest_node->csize)) { + if (retlen != je32_to_cpu(latest_node->csize)) + ret = -EIO; + kfree(f->dents); + f->dents = NULL; + up(&f->sem); + jffs2_do_clear_inode(c, f); + return -ret; + } + + ((char *)f->dents)[je32_to_cpu(latest_node->csize)] = '\0'; + D1(printk(KERN_DEBUG "jffs2_do_read_inode(): symlink's target '%s' cached\n", + (char *)f->dents)); + } + /* fall through... */ case S_IFBLK: @@ -683,12 +717,20 @@ void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f) jffs2_kill_fragtree(&f->fragtree, deleted?c:NULL); - fds = f->dents; + /* For symlink inodes we us f->dents to store the target path name */ + if (S_ISLNK(OFNI_EDONI_2SFFJ(f)->i_mode)) { + if (f->dents) { + kfree(f->dents); + f->dents = NULL; + } + } else { + fds = f->dents; - while(fds) { - fd = fds; - fds = fd->next; - jffs2_free_full_dirent(fd); + while(fds) { + fd = fds; + fds = fd->next; + jffs2_free_full_dirent(fd); + } } if (f->inocache && f->inocache->state != INO_STATE_CHECKING) { |