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author | 2015-08-04 12:17:53 -0700 | |
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committer | 2015-08-04 15:44:42 -0700 | |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/fs/befs/io.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/fs/befs/io.c')
-rw-r--r-- | kernel/fs/befs/io.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/kernel/fs/befs/io.c b/kernel/fs/befs/io.c new file mode 100644 index 000000000..7a5b4ec21 --- /dev/null +++ b/kernel/fs/befs/io.c @@ -0,0 +1,85 @@ +/* + * linux/fs/befs/io.c + * + * Copyright (C) 2001 Will Dyson <will_dyson@pobox.com + * + * Based on portions of file.c and inode.c + * by Makoto Kato (m_kato@ga2.so-net.ne.jp) + * + * Many thanks to Dominic Giampaolo, author of Practical File System + * Design with the Be File System, for such a helpful book. + * + */ + +#include <linux/buffer_head.h> + +#include "befs.h" +#include "io.h" + +/* + * Converts befs notion of disk addr to a disk offset and uses + * linux kernel function sb_bread() to get the buffer containing + * the offset. -Will Dyson + * + */ + +struct buffer_head * +befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr) +{ + struct buffer_head *bh = NULL; + befs_blocknr_t block = 0; + struct befs_sb_info *befs_sb = BEFS_SB(sb); + + befs_debug(sb, "---> Enter %s " + "[%u, %hu, %hu]", __func__, iaddr.allocation_group, + iaddr.start, iaddr.len); + + if (iaddr.allocation_group > befs_sb->num_ags) { + befs_error(sb, "BEFS: Invalid allocation group %u, max is %u", + iaddr.allocation_group, befs_sb->num_ags); + goto error; + } + + block = iaddr2blockno(sb, &iaddr); + + befs_debug(sb, "%s: offset = %lu", __func__, (unsigned long)block); + + bh = sb_bread(sb, block); + + if (bh == NULL) { + befs_error(sb, "Failed to read block %lu", + (unsigned long)block); + goto error; + } + + befs_debug(sb, "<--- %s", __func__); + return bh; + + error: + befs_debug(sb, "<--- %s ERROR", __func__); + return NULL; +} + +struct buffer_head * +befs_bread(struct super_block *sb, befs_blocknr_t block) +{ + struct buffer_head *bh = NULL; + + befs_debug(sb, "---> Enter %s %lu", __func__, (unsigned long)block); + + bh = sb_bread(sb, block); + + if (bh == NULL) { + befs_error(sb, "Failed to read block %lu", + (unsigned long)block); + goto error; + } + + befs_debug(sb, "<--- %s", __func__); + + return bh; + + error: + befs_debug(sb, "<--- %s ERROR", __func__); + return NULL; +} |