diff options
| author | Michal Nazarewicz <m.nazarewicz@samsung.com> | 2009-10-28 16:57:16 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 11:55:18 -0800 |
| commit | e909ef5def59236b91fa9ee83446084eb6f48d1a (patch) | |
| tree | 16ace044a13fac99c58444dd99ffa9a5b1a65aca | |
| parent | d6181702f510302dce5666a50344b5acb196ab4e (diff) | |
USB: g_file_storage: per-LUN ro, removable and cdrom flags handling changed
removable and cdrom flag has been added to the fsg_lun structure
removing any references to mod_data object from storage_common.c.
As of read-only flag, previously it was set if a read-only
backing file was specified (which is good) and remained set
even after the file has been closed (which may be considered an
issue). Currently, the initial read-only flag is preserved so
if it was unset each time file is opened code will try to open
it read-write even if previous file was opened read-only.
Signed-off-by: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/gadget/file_storage.c | 12 | ||||
| -rw-r--r-- | drivers/usb/gadget/storage_common.c | 7 |
2 files changed, 13 insertions, 6 deletions
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c index 90233f4f360..ee712a5715e 100644 --- a/drivers/usb/gadget/file_storage.c +++ b/drivers/usb/gadget/file_storage.c @@ -3138,7 +3138,9 @@ static ssize_t show_ro(struct device *dev, struct device_attribute *attr, char * { struct fsg_lun *curlun = fsg_lun_from_dev(dev); - return sprintf(buf, "%d\n", curlun->ro); + return sprintf(buf, "%d\n", fsg_lun_is_open(curlun) + ? curlun->ro + : curlun->initially_ro); } static ssize_t show_file(struct device *dev, struct device_attribute *attr, @@ -3188,6 +3190,7 @@ static ssize_t store_ro(struct device *dev, struct device_attribute *attr, rc = -EBUSY; } else { curlun->ro = !!i; + curlun->initially_ro = !!i; LDBG(curlun, "read-only status set to %d\n", curlun->ro); } up_read(&fsg->filesem); @@ -3433,9 +3436,10 @@ static int __init fsg_bind(struct usb_gadget *gadget) for (i = 0; i < fsg->nluns; ++i) { curlun = &fsg->luns[i]; - curlun->ro = mod_data.ro[i]; - if (mod_data.cdrom) - curlun->ro = 1; + curlun->cdrom = !!mod_data.cdrom; + curlun->ro = mod_data.cdrom || mod_data.ro[i]; + curlun->initially_ro = curlun->ro; + curlun->removable = mod_data.removable; curlun->dev.release = lun_release; curlun->dev.parent = &gadget->dev; curlun->dev.driver = &fsg_driver.driver; diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c index 19bf1e330dd..affd23b5436 100644 --- a/drivers/usb/gadget/storage_common.c +++ b/drivers/usb/gadget/storage_common.c @@ -225,7 +225,10 @@ struct fsg_lun { loff_t file_length; loff_t num_sectors; + unsigned int initially_ro : 1; unsigned int ro : 1; + unsigned int removable : 1; + unsigned int cdrom : 1; unsigned int prevent_medium_removal : 1; unsigned int registered : 1; unsigned int info_valid : 1; @@ -478,7 +481,7 @@ static int fsg_lun_open(struct fsg_lun *curlun, const char *filename) loff_t min_sectors; /* R/W if we can, R/O if we must */ - ro = curlun->ro; + ro = curlun->initially_ro; if (!ro) { filp = filp_open(filename, O_RDWR | O_LARGEFILE, 0); if (-EROFS == PTR_ERR(filp)) @@ -521,7 +524,7 @@ static int fsg_lun_open(struct fsg_lun *curlun, const char *filename) } num_sectors = size >> 9; // File size in 512-byte blocks min_sectors = 1; - if (mod_data.cdrom) { + if (curlun->cdrom) { num_sectors &= ~3; // Reduce to a multiple of 2048 min_sectors = 300*4; // Smallest track is 300 frames if (num_sectors >= 256*60*75*4) { |