64 lines
1.9 KiB
Diff
64 lines
1.9 KiB
Diff
From 53799c2c610f43e9be3aeefcee00977aed7d736b Mon Sep 17 00:00:00 2001
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From: Stephen Warren <swarren@nvidia.com>
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Date: Thu, 23 Jan 2014 12:56:59 -0700
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Subject: [PATCH 11/13] ext4: implement exists() for ext4fs
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This hooks into the generic "file exists" support added in an earlier
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patch, and provides an implementation for the ext4 filesystem.
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Signed-off-by: Stephen Warren <swarren@nvidia.com>
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Acked-by: Simon Glass <sjg@chromium.org>
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---
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fs/ext4/ext4fs.c | 8 ++++++++
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fs/fs.c | 2 +-
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include/ext4fs.h | 1 +
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3 files changed, 10 insertions(+), 1 deletion(-)
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diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
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index 735b256..71ecdd8 100644
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--- a/fs/ext4/ext4fs.c
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+++ b/fs/ext4/ext4fs.c
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@@ -174,6 +174,14 @@ int ext4fs_ls(const char *dirname)
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return 0;
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}
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+int ext4fs_exists(const char *filename)
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+{
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+ int file_len;
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+
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+ file_len = ext4fs_open(filename);
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+ return (file_len >= 0) ? 0 : 1;
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+}
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+
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int ext4fs_read(char *buf, unsigned len)
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{
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if (ext4fs_root == NULL || ext4fs_file == NULL)
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diff --git a/fs/fs.c b/fs/fs.c
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index 4f344c6..3f14d01 100644
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--- a/fs/fs.c
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+++ b/fs/fs.c
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@@ -91,7 +91,7 @@ static struct fstype_info fstypes[] = {
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.probe = ext4fs_probe,
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.close = ext4fs_close,
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.ls = ext4fs_ls,
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- .exists = fs_exists_unsupported,
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+ .exists = ext4fs_exists,
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.read = ext4_read_file,
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.write = fs_write_unsupported,
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},
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diff --git a/include/ext4fs.h b/include/ext4fs.h
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index 2429380..aacb147 100644
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--- a/include/ext4fs.h
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+++ b/include/ext4fs.h
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@@ -134,6 +134,7 @@ int ext4fs_read(char *buf, unsigned len);
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int ext4fs_mount(unsigned part_length);
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void ext4fs_close(void);
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int ext4fs_ls(const char *dirname);
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+int ext4fs_exists(const char *filename);
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void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot);
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int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf);
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void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
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--
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1.8.5.3
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