kernel/linux.git/init/do_mounts.c, branch v4.11.5

init: reduce rootwait polling interval time to 5ms

2016-12-13T02:55:10+00:00

For several devices, the rootwait time is sensitive because it directly affects booting time. The polling interval of rootwait is currently 100ms. To save unnessesary waiting time, reduce the polling interval to 5 ms. [akpm@linux-foundation.org: remove used-once #define] Link: http://lkml.kernel.org/r/20161207060743.1728-1-js07.lee@samsung.com Signed-off-by: Jungseung Lee Cc: Al Viro Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

init/do_mounts.c: add create_dev() failure log

2015-06-26T00:00:42+00:00

If create_dev() function fails to create the root mount device (/dev/root), then it goes to panic as root device not found but there is no printk in this case. So I have added the log in case it fails to create the root device. It will help in debugging. [akpm@linux-foundation.org: simplify printk(), use pr_emerg(), display errno] Signed-off-by: Vishnu Pratap Singh Acked-by: Pavel Machek Cc: Paul Gortmaker Cc: Mike Snitzer Cc: Dan Ehrenberg Cc: Miklos Szeredi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

init: fix regression by supporting devices with major:minor:offset format

2015-05-05T16:31:37+00:00

Commit 283e7ad02 ("init: stricter checking of major:minor root= values") was so strict that it exposed the fact that a previously unknown device format was being used. Distributions like Ubuntu uses klibc (rather than uswsusp) to resume system from hibernation. klibc expressed the swap partition/file in the form of major:minor:offset. For example, 8:3:0 represents a swap partition in klibc, and klibc's resume process in initrd will finally echo 8:3:0 to /sys/power/resume for manually resuming. However, due to commit 283e7ad02's stricter checking, 8:3:0 will be treated as an invalid device format, and manual resuming from hibernation will fail. Fix this by adding support for devices with major:minor:offset format when resuming from hibernation. Reported-by: Prigent, Christophe Signed-off-by: Chen Yu Acked-by: Rafael J. Wysocki Signed-off-by: Mike Snitzer

init: stricter checking of major:minor root= values

2015-04-15T16:10:19+00:00

In the kernel command-line, previously, root=1:2jakshflaksjdhfa would be accepted and interpreted just like root=1:2. This patch adds stricter checking so that additional characters after major:minor are rejected by root=. The goal of this change is to help in unifying DM's interpretation of its block device argument by using existing kernel code (name_to_dev_t). But DM rejects malformed major:minor pairs, it seems reasonable for root= to reject them as well. Signed-off-by: Dan Ehrenberg Signed-off-by: Mike Snitzer

init: export name_to_dev_t and mark name argument as const

2015-04-15T16:10:18+00:00

DM will switch its device lookup code to using name_to_dev_t() so it must be exported. Also, the @name argument should be marked const. Signed-off-by: Dan Ehrenberg Signed-off-by: Mike Snitzer

init: fix read-write root mount

2014-12-17T13:27:14+00:00

If mount flags don't have MS_RDONLY, iso9660 returns EACCES without actually checking if it's an iso image. This tricks mount_block_root() into retrying with MS_RDONLY. This results in a read-only root despite the "rw" boot parameter if the actual filesystem was checked after iso9660. I believe the behavior of iso9660 is okay, while that of mount_block_root() is not. It should rather try all types without MS_RDONLY and only then retry with MS_RDONLY. This change also makes the code more robust against the case when EACCES is returned despite MS_RDONLY, which would've resulted in a lockup. Signed-off-by: Miklos Szeredi Signed-off-by: Al Viro

init/do_mounts: better syntax description

2014-08-28T12:46:26+00:00

Specify hex device number unambiquously. Signed-off-by: Pavel Machek Signed-off-by: Jiri Kosina

init/do_mounts.c: fix comment error

2014-04-03T23:21:16+00:00

Signed-off-by: chishanmingshen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

init/do_mounts.c: add maj:min syntax comment

2013-11-13T03:09:12+00:00

The name_to_dev_t function has a comment block which lists the supported syntaxes for the device name. Add a bullet for the : syntax, which is already supported in the code Signed-off-by: Sebastian Capella Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

initmpfs: use initramfs if rootfstype= or root= specified

2013-09-11T22:59:38+00:00

Command line option rootfstype=ramfs to obtain old initramfs behavior, and use ramfs instead of tmpfs for stub when root= defined (for cosmetic reasons). [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Rob Landley Cc: Jeff Layton Cc: Jens Axboe Cc: Stephen Warren Cc: Rusty Russell Cc: Jim Cromie Cc: Sam Ravnborg Cc: Greg Kroah-Hartman Cc: "Eric W. Biederman" Cc: Alexander Viro Cc: "H. Peter Anvin" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds