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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/efs/symlink.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.bz2 linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'fs/efs/symlink.c')
-rw-r--r-- | fs/efs/symlink.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/fs/efs/symlink.c b/fs/efs/symlink.c new file mode 100644 index 000000000000..3d9a350e3e7f --- /dev/null +++ b/fs/efs/symlink.c @@ -0,0 +1,58 @@ +/* + * symlink.c + * + * Copyright (c) 1999 Al Smith + * + * Portions derived from work (c) 1995,1996 Christian Vogelgsang. + */ + +#include <linux/string.h> +#include <linux/efs_fs.h> +#include <linux/pagemap.h> +#include <linux/buffer_head.h> +#include <linux/smp_lock.h> + +static int efs_symlink_readpage(struct file *file, struct page *page) +{ + char *link = kmap(page); + struct buffer_head * bh; + struct inode * inode = page->mapping->host; + efs_block_t size = inode->i_size; + int err; + + err = -ENAMETOOLONG; + if (size > 2 * EFS_BLOCKSIZE) + goto fail; + + lock_kernel(); + /* read first 512 bytes of link target */ + err = -EIO; + bh = sb_bread(inode->i_sb, efs_bmap(inode, 0)); + if (!bh) + goto fail; + memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size); + brelse(bh); + if (size > EFS_BLOCKSIZE) { + bh = sb_bread(inode->i_sb, efs_bmap(inode, 1)); + if (!bh) + goto fail; + memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE); + brelse(bh); + } + link[size] = '\0'; + unlock_kernel(); + SetPageUptodate(page); + kunmap(page); + unlock_page(page); + return 0; +fail: + unlock_kernel(); + SetPageError(page); + kunmap(page); + unlock_page(page); + return err; +} + +struct address_space_operations efs_symlink_aops = { + .readpage = efs_symlink_readpage +}; |