From 30c40d2c01f68c7eb1a41ab3552bdaf5dbf300d4 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 22 Feb 2008 19:50:45 -0500 Subject: [PATCH] propagate mode through open_bdev_excl/close_bdev_excl replace open_bdev_excl/close_bdev_excl with variants taking fmode_t. superblock gets the value used to mount it stored in sb->s_mode Signed-off-by: Al Viro --- fs/super.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'fs/super.c') diff --git a/fs/super.c b/fs/super.c index e931ae9..0d77ac2 100644 --- a/fs/super.c +++ b/fs/super.c @@ -760,9 +760,13 @@ int get_sb_bdev(struct file_system_type *fs_type, { struct block_device *bdev; struct super_block *s; + fmode_t mode = FMODE_READ; int error = 0; - bdev = open_bdev_excl(dev_name, flags, fs_type); + if (!(flags & MS_RDONLY)) + mode |= FMODE_WRITE; + + bdev = open_bdev_exclusive(dev_name, mode, fs_type); if (IS_ERR(bdev)) return PTR_ERR(bdev); @@ -785,11 +789,12 @@ int get_sb_bdev(struct file_system_type *fs_type, goto error_bdev; } - close_bdev_excl(bdev); + close_bdev_exclusive(bdev, mode); } else { char b[BDEVNAME_SIZE]; s->s_flags = flags; + s->s_mode = mode; strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); sb_set_blocksize(s, block_size(bdev)); error = fill_super(s, data, flags & MS_SILENT ? 1 : 0); @@ -807,7 +812,7 @@ int get_sb_bdev(struct file_system_type *fs_type, error_s: error = PTR_ERR(s); error_bdev: - close_bdev_excl(bdev); + close_bdev_exclusive(bdev, mode); error: return error; } @@ -817,10 +822,11 @@ EXPORT_SYMBOL(get_sb_bdev); void kill_block_super(struct super_block *sb) { struct block_device *bdev = sb->s_bdev; + fmode_t mode = sb->s_mode; generic_shutdown_super(sb); sync_blockdev(bdev); - close_bdev_excl(bdev); + close_bdev_exclusive(bdev, mode); } EXPORT_SYMBOL(kill_block_super); -- cgit v1.1 From 6de24f0ed08054b2a202902e4d63beff27654db8 Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 28 Aug 2008 06:25:49 +0400 Subject: [PATCH 1/2] anondev: init IDR statically Signed-off-by: Alexey Dobriyan --- fs/super.c | 7 +------ 1 file changed, 1 insertion(+), 6 deletions(-) (limited to 'fs/super.c') diff --git a/fs/super.c b/fs/super.c index e931ae9..dd23bf9 100644 --- a/fs/super.c +++ b/fs/super.c @@ -682,7 +682,7 @@ void emergency_remount(void) * filesystems which don't use real block-devices. -- jrs */ -static struct idr unnamed_dev_idr; +static DEFINE_IDR(unnamed_dev_idr); static DEFINE_SPINLOCK(unnamed_dev_lock);/* protects the above */ int set_anon_super(struct super_block *s, void *data) @@ -726,11 +726,6 @@ void kill_anon_super(struct super_block *sb) EXPORT_SYMBOL(kill_anon_super); -void __init unnamed_dev_init(void) -{ - idr_init(&unnamed_dev_idr); -} - void kill_litter_super(struct super_block *sb) { if (sb->s_root) -- cgit v1.1 From ad76cbc63b9db7c98da49af3182a783ca1c80a5d Mon Sep 17 00:00:00 2001 From: Alexey Dobriyan Date: Thu, 28 Aug 2008 06:26:23 +0400 Subject: [PATCH 2/2] anondev: switch to IDA Signed-off-by: Alexey Dobriyan --- fs/super.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'fs/super.c') diff --git a/fs/super.c b/fs/super.c index dd23bf9..f31ef82 100644 --- a/fs/super.c +++ b/fs/super.c @@ -682,7 +682,7 @@ void emergency_remount(void) * filesystems which don't use real block-devices. -- jrs */ -static DEFINE_IDR(unnamed_dev_idr); +static DEFINE_IDA(unnamed_dev_ida); static DEFINE_SPINLOCK(unnamed_dev_lock);/* protects the above */ int set_anon_super(struct super_block *s, void *data) @@ -691,10 +691,10 @@ int set_anon_super(struct super_block *s, void *data) int error; retry: - if (idr_pre_get(&unnamed_dev_idr, GFP_ATOMIC) == 0) + if (ida_pre_get(&unnamed_dev_ida, GFP_ATOMIC) == 0) return -ENOMEM; spin_lock(&unnamed_dev_lock); - error = idr_get_new(&unnamed_dev_idr, NULL, &dev); + error = ida_get_new(&unnamed_dev_ida, &dev); spin_unlock(&unnamed_dev_lock); if (error == -EAGAIN) /* We raced and lost with another CPU. */ @@ -704,7 +704,7 @@ int set_anon_super(struct super_block *s, void *data) if ((dev & MAX_ID_MASK) == (1 << MINORBITS)) { spin_lock(&unnamed_dev_lock); - idr_remove(&unnamed_dev_idr, dev); + ida_remove(&unnamed_dev_ida, dev); spin_unlock(&unnamed_dev_lock); return -EMFILE; } @@ -720,7 +720,7 @@ void kill_anon_super(struct super_block *sb) generic_shutdown_super(sb); spin_lock(&unnamed_dev_lock); - idr_remove(&unnamed_dev_idr, slot); + ida_remove(&unnamed_dev_ida, slot); spin_unlock(&unnamed_dev_lock); } -- cgit v1.1