4c728ef583
Fsync currently has a fdatawrite/fdatawait pair around the method call, and a mutex_lock/unlock of the inode mutex. All callers of fsync have to duplicate this, but we have a few and most of them don't quite get it right. This patch adds a new vfs_fsync that takes care of this. It's a little more complicated as usual as ->fsync might get a NULL file pointer and just a dentry from nfsd, but otherwise gets afile and we want to take the mapping and file operations from it when it is there. Notes on the fsync callers: - ecryptfs wasn't calling filemap_fdatawrite / filemap_fdatawait on the lower file - coda wasn't calling filemap_fdatawrite / filemap_fdatawait on the host file, and returning 0 when ->fsync was missing - shm wasn't calling either filemap_fdatawrite / filemap_fdatawait nor taking i_mutex. Now given that shared memory doesn't have disk backing not doing anything in fsync seems fine and I left it out of the vfs_fsync conversion for now, but in that case we might just not pass it through to the lower file at all but just call the no-op simple_sync_file directly. [and now actually export vfs_fsync] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> |
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| amd5536udc.c | ||
| amd5536udc.h | ||
| at91_udc.c | ||
| at91_udc.h | ||
| atmel_usba_udc.c | ||
| atmel_usba_udc.h | ||
| cdc2.c | ||
| composite.c | ||
| config.c | ||
| dummy_hcd.c | ||
| epautoconf.c | ||
| ether.c | ||
| f_acm.c | ||
| f_ecm.c | ||
| f_loopback.c | ||
| f_obex.c | ||
| f_phonet.c | ||
| f_rndis.c | ||
| f_serial.c | ||
| f_sourcesink.c | ||
| f_subset.c | ||
| file_storage.c | ||
| fsl_qe_udc.c | ||
| fsl_qe_udc.h | ||
| fsl_usb2_udc.c | ||
| fsl_usb2_udc.h | ||
| g_zero.h | ||
| gadget_chips.h | ||
| gmidi.c | ||
| goku_udc.c | ||
| goku_udc.h | ||
| inode.c | ||
| lh7a40x_udc.c | ||
| lh7a40x_udc.h | ||
| m66592-udc.c | ||
| m66592-udc.h | ||
| ndis.h | ||
| net2280.c | ||
| net2280.h | ||
| omap_udc.c | ||
| omap_udc.h | ||
| printer.c | ||
| pxa25x_udc.c | ||
| pxa25x_udc.h | ||
| pxa27x_udc.c | ||
| pxa27x_udc.h | ||
| rndis.c | ||
| rndis.h | ||
| s3c2410_udc.c | ||
| s3c2410_udc.h | ||
| serial.c | ||
| u_ether.c | ||
| u_ether.h | ||
| u_phonet.h | ||
| u_serial.c | ||
| u_serial.h | ||
| usbstring.c | ||
| zero.c | ||